Apple MD094LL/A manuale d’uso

 Apple T echnician Guide iM ac (2 7-inch, M id 20 1 0) 20 1 0-09-09[...]

 Apple Inc. © 20 1 0 Apple Inc. All rights reserved. Under the copyright laws , this document may not be copied , in whole or in part, without the written consent of Apple . Every e ort has been made to ensure that the information in this document is accurat e. Apple is not responsible f or printing or clerical errors. Apple 1 Innite Loop[...]

iM ac (2 7-inch, M id 20 1 0) C ontents About This Guide Updates 1 0 Updated 9 September 2 0 1 0 1 0 Updated 9 August 2 0 1 0 1 0 Apple T echnician Guide introduced 2 7 July 20 1 0 1 0 F eedback 1 0 Basics Overview 1 2 Identifying F eatures 1 3 Pr oduct Congurations 1 3 Safety Preca utions 1 4 Serial Number Location 1 5 New Accessorie s 1 6 Magi[...]

LED F unctions 30 LED Startup S equence 3 1 Logic Board T est P oints 3 2 F unctional O verview 3 3 Block Diagram 34 Symptom Cha r ts 3 5 Startup and Pow er 35 No P ower , Dead Unit 3 5 W on ’t Start Up 3 7 Intermittent S hutdown 39 Kernel P anic, System Crashes 44 No Video 46 Corrupted V ideo 48 Burnt Smell/Odor 5 1 Uncategorized Sympt oms 52 Di[...]

Audio: Built-in Speak ers Have Dist or ted Sound 97 Audio: No Audio from Built-in Speakers 98 Camera Issues 1 0 1 Fir eWire Device Not Recognized 1 02 USB Device Not Recognized 1 04 Wired Keyboard Does Not F unc tion Properly 1 06 Keyboard: Specic Keys Do Not Respond 1 08 Wired Keyboard/Mouse Not Recognized 1 08 Wireless Input Device Does Not P [...]

Camera 1 4 4 Removal 1 45 Reassembly 1 46 L CD Panel 1 47 Removal 1 48 Handling the P anel 1 5 3 Reassembly 1 54 V er tical Sync Cable ( Vsync) 1 5 7 LED T emp Sensor Cable 1 58 Displa yP or t Cable 1 59 Audio P or ts and Cable 1 6 1 AirP or t Antenna 1 63 AirP or t Card 1 65 AirP or t Carrier Board 1 67 AirP or t Cable 1 69 Bluetooth Ant enna 1 7 [...]

Reassembly 1 93 Optical Sensor Cable 1 95 Optical Drive F an 1 97 SD Card Reader 1 99 Removal 200 Reassembly 20 1 SD Card Reader C able 202 IR Board and Cable 204 Logic Board 206 Removal 207 Handling the Logic Board 209 Reassembly 2 1 0 Video Card 2 1 6 Solid State Driv e (SSD) 2 1 9 Removal 2 20 Reassembly 222 SSD Data Cable 22 3 Optical/MXM Pr es[...]

Stand 248 Removal 2 49 Reassembly 250 Mechanism 25 2 Bluetooth Cable 254 Camera C able 25 7 Cable , A C/DC P ower/Backlight/SA T A 260 Cable , A C/DC P ower/Backlight/SA T A, SSD 262 Microphone Cable 265 Rear Housing 266 Reassembly 267 Additional P rocedures Retrieving Mechanism 27 2 Views Exploded V iews 27 7 Exploded View #1 277 Exploded View #2 [...]

© 2009 Apple Inc . All rights reserved.  Apple T echnician Guide About This Guide iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) About T his Guide — Updates 1 0 20 1 0-09-09 Updat es Updated 9 September 20 1 0 T roubleshooting: • Display: several symptoms: Modied steps to allow unit to warm up for about a minute (instead of 1 5 minutes) before e valuating front-of-scr een per formance. T ake Apar t: • L CD P anel: Added not e that overtigh[...]

© 20 1 0 Apple Inc. All r ights reserved.  Apple T echnician Guide Basics iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 2 20 1 0-09-09 O v er view Introducing the iMac (27-inch, M id 20 1 0) with the latest Intel Cor e i3, Core i5 and C ore i7 processors and pow er ful new graphics. The new iM ac line is the fastest ev er with dual-core processor s peeds up to 3.6 GHz, quad-core speeds up to 2. 93 GHz and discret e g[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 3 20 1 0-09-09 Identifying F eatures The iMac (27-inch, Late 20 1 0) computer f eatures include: • 27-inch displa y 2560 x 1 4 40 LED-backlit display • Increased processor s peeds: • 3.2 0 GHz Intel Core i3 with 4MB shar ed L3 cache • 2.80 GHz Intel C ore i5 (CTO) • 3.60 GHz Quad-C ore Int[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 4 20 1 0-09-09 Safety Pr ecautions W ARNING: HIGH VOL T AGE : The AC/DC pow er supply PCB remains power ed up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the fr ont bezel remo ved . Important : If the compu[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 5 20 1 0-09-09 Serial Number Location The iMac (27-inch, M id 20 1 0) serial number is located on the base of the stand . When replacing a stand, transfer the serial number to the new stand .[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 6 20 1 0-09-09 New A ccessories Magic T rackpad The wireless Magic T rackpad uses Bluetooth® technology to connect to the Mac and comes with two AA batteries installed . T o use the M agic Tr ackpad and its full features, update your Mac to Mac OS X version 1 0.6.4 or later , and then install the l[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 7 20 1 0-09-09 P airing the Magic T rackpad T o pair your trackpad: 1 . Choose Apple () > System P references , and then click T rack pad. 2. Click “Set Up Bluetooth T rack pad …” in the lower-right corner . 3. Pr ess the On/o button on your trackpad to turn it on. 4. Click Continue w[...]

iMac (27-inch, Mid 20 1 0) Basics — O verview 1 8 20 1 0-09-09 Apple Battery Charger Use the Apple Battery Charger to charge r echargeable NiMH batteries for your Apple pr oducts that use AA batteries. Each Apple Battery Charger comes with six high-performance AA NiMH batteries: two for your keyboard , two for your mouse or trackpad , and two for[...]

© 20 1 0 Apple Inc. All r ights reserved.  Apple T echnician Guide T roubleshooting iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 20 20 1 0-09-09 General T roubleshooting Wirele ss T roubleshooting If you ’ re having issues with Bluet ooth and wireless connectivity issues, refer to the following: • TS304 8 T roubleshooting wireless mouse and ke yboard issues • HT3887 W ireless input devic es: Bluetooth frequently [...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 2 1 20 1 0-09-09 Hardwa re vs . S oftware F or information on how to isolat e a hardware issue from a software issue , refer to: kBase #TS1 388: Isolating issues in Mac OS X F or information on how to trouble shoot a software issue, refer to: kBase #HT1 1 99: Mac OS X: How to troubleshoot a s[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 22 20 1 0-09-09 Resetting the Sy stem Management C ontroller (SMC) The Syst em Management Controller (SMC) is a chip on logic board tha t controls all pow er functions. If computer is experiencing any pow er issue, such as not star ting up, not displaying video , sleep issues, battery managem[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 23 20 1 0-09-09 Starting Up in S afe Mode A Safe Boot is a special way t o star t Mac OS X when troubleshooting . T o start up in S afe Mode: 1 . Make sure computer is shut down. 2. Pre ss power button. 3. Immediately after you hear the startup tone, press and hold Shift key . Note: The Shift[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 24 20 1 0-09-09 Removing the Batt er y , Measuring DC V oltage 1 . Unplug the computer . Allow several minutes for po wer supply to discharge . 2. Remove logic board . 3. Remove coin batt er y for 1-2 minutes . The coin batter y is located on the back side of the logic board (see graphic belo[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 25 20 1 0-09-09 Diagnostics The follo wing diagnostics are required for this pr oduct: • Apple Ser vice Diagnostic (ASD), version 3S1 40 • F or iM ac (27-inch, Mid 20 1 0): Apple Hardwar e T est (AHT ), version 3A202 • Bluetooth Ser vice Diagnostic (BSD) 1 . 1 Sensors Errors Run latest [...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 26 20 1 0-09-09 TS2P Excessiv e upper internal enclosure temperatur e, or Skin temp sensor damaged/ disconnected from top of logic board . V erify that the skin temp sensor cable is securely connected to the top of the logic board and sensor is attached to rear housing (near the camera). Repl[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 27 20 1 0-09-09 Sensor Locations T emp sensors and fan connector locations are shown in the next two graphics. Ensure cables are correctly routed and the sensors and fans are pr operly connected. If a sensor or fan is faulty or not connected, Apple Hardware T est will generate an error code .[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 28 20 1 0-09-09 Sensor Connector Location: Back Side of Logic Board[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 29 20 1 0-09-09 Diagnostic LEDs The iMac (27-inch, M id 20 1 0) computer has four built-in diagnostic LEDs on the main logic board that can help you to tr oubleshoot the computer . T he LEDs are located on the bottom left edge of the logic board (under a piece of black mylar tape) and can onl[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 30 20 1 0-09-09 LED F unc tions LED #1 • Indicates that trickle voltage from power supply has been detected by logic board . This LED will remain ON whenever the iMac is connected to a working AC po wer source. The LED will remain ON even when comput er has been shut down or put to sleep . [...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 3 1 20 1 0-09-09 LED Startup S equence LED #1 = P ower a vailable . If no LED is visible: • Verify A C power source • Verify known-good AC cable is connected • Verify cable connection between AC inlet and po wer supply • Verify cable connection between power supply and logic boar d ?[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 32 20 1 0-09-09 Logic Board T est P oints Some test points are acc essible on the logic board when the L CD panel is removed . The test poin ts are dened below . Logic Board T est P oint F unction Pin 1 Ground Pin 3 5V power f or Hard Drive(s). Note: If present, the 1 2V power will come di[...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 3 3 20 1 0-09-09 F unc tional O v er view Refer to this diagram f or symptoms related to logic boar d connectors. T o rotate this page in Preview f or easier viewing, go to T ools menu and choose “Rotate L eft ” . C P U Fa n: - sy st em f re ez e s o r ke rn el p a n ic i f C P U ge ts o [...]

iMac (27-inch, Mid 20 1 0) — G eneral Tr oubleshooting 34 20 1 0-09-09 Block Diagram Refer to this diagram t o see how modules are interr elated. SO-DIMM Antenna Antenna Antenna SO-DIMM T emperature Sensor T emperature Sensor Fan MLB SO-DIMM Display AC/DC Power Button Bluetooth Speakers Hard Drive Optional SSD drive Optical Drive AC Inlet T emp S[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 35 20 1 0-09-09 S ymptom Cha r ts F ollow steps in the order indicated belo w . If an action resolves the issue , retest system t o verify . Star tup and P ow er No P ower , Dead Unit Unlikely cause: speakers Quick Check Symptoms Quick Check No P ower , Dead Unit • No power • No [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 36 20 1 0-09-09 3. Pre ss power button while monitoring diagnostic LEDs. V erify if LED #2 turns ON and remains ON after pressing the power button. Y ou may alternately check for a po wer request signal between pin 1 2 and pin 1 of logic board. Y es P ower supply functioning and logi[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 3 7 20 1 0-09-09 W on ’t S tar t Up Quick Check Symptoms Quick Check W on’ t Start Up • No star tup chime. • Error tones during startup. • Grey screen with fan noise , or other noise. • Will not progress beyond Apple logo or spinning gear . 1 . Isolate OS by starting up f[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 38 20 1 0-09-09 3. W ait 1 5 seconds after computer was powered do wn then disconnect AirP or t cable from logic board. V erify if computer star ts up properly now . Y es Go to AirP or t Card Kernel Panic sympt om ow . No Go to step 4. 4. Startup with Alt k ey to select and start [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 39 20 1 0-09-09 Intermitt ent Shutdo wn T roubleshooting Shutdo wn Causes Always run the lat est available A pple ser vice utilities to check f or any abnormal value reading from a thermal, a voltage, or a cur rent sensor , or from a fan s peed meter . The log les may also report [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 40 20 1 0-09-09 3) P ower-related sy stem shut downs: • External power source was remo ved. P ower-rela ted shut downs are due to pow er management, poor connec tions, or defective power sourc es. Suggested steps f or troubleshooting are : • Reset the SMC: Refer to: kBase #HT3964[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 4 1 20 1 0-09-09 Quick Check Symptoms Quick Check Intermitten t Shutdown • P owers o during startup. • P owers o during desktop use . • Computer re star ts spontaneously . • P owers o when waking from sleep. 1 . Make sure that power cord is secur ely attached to the [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 42 20 1 0-09-09 Deep Dive Check Result Action Code 1 . Activity related shutdowns: Reset SMC and PRAM and verify that shutdown issue still happens. Y es Check with known-good bootable drive: go to step 2 No Shutdown cause was rela ted to SMC or PRAM programmed shutdown settings or co[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 43 20 1 0-09-09 7 . Replace DC power cable , which supplies power t o logic board , hard drive , and LED backlight board. V erify if system continue s to restart or shutdown. Y es Go to step 8 No Issue resolved with DC power cable replacement. X03 8. Hardware-rela ted shutdowns: Run [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 44 20 1 0-09-09 Kernel P anic, System C rashes Quick Check Symptoms Quick Check Kernel P anic, System Crashe s • Kernel P anic on star tup or desktop use. • System freez e during use. • System freez e upon wake from sleep. 1 . Isolate OS by starting up from original install med[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 45 20 1 0-09-09 3. Use known-good SDRAM in the system. V erify if system star t without kernel panic now . Y es Install user ’ s SDRAM one by one and retest. If kernel panic repeats, replace a ected SDRAM. V erify if correct SDRAM specication is being used. X0 1 No Go to step[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 46 20 1 0-09-09 No Video Unlikely cause: hard drive , optical drive , s peakers, camera, microphone Quick Check Symptoms Quick Check No Video • No image. • Backlight failure. 1 . Check brightness setting . 2. F or no-video issues, connect an ex ternal display to Verify if iMac vi[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 47 20 1 0-09-09 4. Pivot enclosure t o access lower intake ven t, and locate diagnostic LEDs on edge of logic board. V erify if LED #3 turns on shor tly after system powers on. Y es Logic board communicating with video card . Go to step 5 . No If LED #3 does not turn ON reseat video [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 48 20 1 0-09-09 C orrupted Video Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Corrupted Video • T ext and graphics appear fuzz y • Image corrupted 1 . Using the KBase article http://suppor t.apple.[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 49 20 1 0-09-09 Deep Dive Check Result Action Code 1 . Boot from Install DVD and V erify if issue is still visible. Y es Go to step 2. No Issue likely caused by software or driver issue. T roubleshoot for software issues. Make sure all sof tware and rmware updates ha ve been insta[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 50 20 1 0-09-09 7 . Disconnect DisplayP or t cable between L CD display and logic board , and verify if there is damage to cable or connectors. Repeat with vertical sync cable connected between L CD panel and LED backlight board. Y es Replace DisplayP or t cable or any other damaged [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 5 1 20 1 0-09-09 Burnt Smell/Odor Unlikely cause: speakers , microphone, rear housing Quick Check Symptoms Quick Check Burnt Smell/Odor • Burning smell • Unusual odor 1 . V erify that computer is the source of the odor . 2. If system is new , see kBase #T A22044: New Equipment: O[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Startup and Pow er 52 20 1 0-09-09 3. V erify if source of odor can be located using your nose . Y es Check all AC and DC pow er cables for pinch or damage . Replace a ected module(s) and retest syst em. P08 No Contact Apple f or assistance if you feel tha t there is a possible safety issue with com[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 5 3 20 1 0-09-09 Displa y Backlight Issue/No Back light Unlikely cause: hard drive , optical drive , s peakers, camera, microphone Quick Check Symptoms Quick Check Backlight Issue/No Backlight • No image • P ar tial backlight failure • Backlight ick ers • Display dim 1 . Check for So[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 54 20 1 0-09-09 5. Shine bright (low heat) ashlight onto fron t of L CD . With computer power ed ON verify if a faint image is visible. Y es L CD panel func tional but backlight is missing or dim. Remove L CD panel and inspect and reseat the following cable connections: -Backlight power cabl[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 5 5 20 1 0-09-09 Noise / Unstable Flick ering Unlikely cause: camera, microphone Quick Check Symptoms Quick Check Noise / Unstable Flickering • Flickering image • Horizontal bands of static intermittently appear • Dock and / or menu bar shift positions • Display int ermittently ashes[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 56 20 1 0-09-09 3. When display icker , verify whether one of the following symptoms occurred: • Flickering image • Horizontal bands of static intermittently appear • Dock and / or menu bar shift positions • Display int ermittently ashes on / o Y es Remove glass and L CD panel.[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 5 7 20 1 0-09-09 8. V erify if high pitch noise varies when adjusting brightness level up and down. Y es Noise seems to be generated by vertical sync cable. Inspect and replace cable. Replace the LED Backlight board if problem persists. X03 No Noise is from another source . Go to step 8. 9 . V [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 5 8 20 1 0-09-09 L CD Image Issues Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptom Quick Check L CD Issues • Incorrect/missing colors • Distorted/blurred image • Pixel anomalies • V er tical/horizontal lines • Non-unif[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 5 9 20 1 0-09-09 4. V erify if issue is bright or dark pixel anomalies . Y es Go to pixel anomalie s. No Go to step 5 . 5. V erify if issue is vertical or horizontal lines . Y es Go to vertical/horizontal lines. No Go to step 6. 6. V erify if issue is non-uniform brightness. Y es Go to non-unif[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 60 20 1 0-09-09 Incorrect/Missing Colors Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Incorrect/Missing Colors • Wrong color dis play • Color/contr ast issues 1 . Allow displa y to reach normal operating temp[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 6 1 20 1 0-09-09 4. Set up computer side-by-side with a known-good, same- model computer showing same image. Verify if issue is noticeably worse on displa y being tested . Y es Replace L CD panel. Run Apple Service Display Utility to verify the resolution of issue. Enter the re sulting veric[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 62 20 1 0-09-09 Distor ted/Blurred Image Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Distorted/Blurred Image • T ext and graphics appear fuzz y • Image corrupted 1 . If display icker only occurs when the [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 6 3 20 1 0-09-09 3. V erify if issue is visible on an external display attached to mini DisplayP or t. Y es Issue NO T caused by internal L CD panel. Go to step 7 . No Go to step 4. 4. Inspect glass panel. V erify if issue is ca used by condensation or contaminants on inside sur face of glass p[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 64 20 1 0-09-09 Pix el Anomalies Unlikely cause: logic btoard , po wer supply , hard drive , optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Pixel A nomalies • Dark dot anomalies • Bright dot anomalies • Debris on inside sur face of glass panel • Debri[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 65 20 1 0-09-09 4. Determine if combination of bright/dark pixel defects exceed acc eptable number . See kBase #HT1 72 1: About L CD displa y pixel anomalies. Y es Replace L CD panel. Run Apple Service Display Utility to verify the resolution of issue. Enter the re sulting verication code in[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 66 20 1 0-09-09 V er tical/Horizontal Line s Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check V er tical/Horizontal Lines • V er tical lines • Horizontal lines 1 . Boot from install DVD to determine if potential [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 6 7 20 1 0-09-09 6. V erify if issue is still present with replacement logic board installed. Y es Go to step 7 No Issue resolved . 7 . Reinstall original logic board and verify if issue is still presen t with original logic board reinstalled . Y es Replace L CD panel. Run Apple Ser vice Displa[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 68 20 1 0-09-09 Non-Uniform B rightness / C olor Unlikely cause: pow er supply , har d drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Non-Uniform Brightne ss/Color • Brightness not uniform • Color not uniform • Y ellow tint 1 . V erify System P r[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Display 6 9 20 1 0-09-09 C osmetic Defec ts Symptoms Quick Check Cosmetic Defects to L CD • Cracked glass panel • Cracked L CD • Scratched L CD polarizer • Scorched or melted L CD • L CD impact damage • F oreign material on L CD or back side of glass panel. 1 . Replace glass panel. Refer to[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 70 20 1 0-09-09 Mass Stor age Hard Driv e Not Recognized Unlikely cause: L CD panel, power supply , fans, speakers, camera, micr ophone Quick Check Symptoms Quick Check Drive Not Recogniz ed Drive No Boot • Flashing Question Mark • Boots to Grey Screen • Boots to Blue Screen • Boot[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 1 20 1 0-09-09 5. Check that the 4 wire SA T A power cable (carrying 1 2v and 5v DC) is correctly connected to the Hard Drive (other SA T A power connector has less wire s and is reserved for 5v DC only , optional SSD drive). Inspect internal drive(s) SA T A and power cables and c onnect[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 2 20 1 0-09-09 1 1 . If restore from Install DVD is unsuccessful, star tup a known- good Intel Mac system with T key pressed (to enter T arget Disk Mode), inser t the iMac Install DVD in its optical drive and connect it to the user ’ s system via a F ireWire cable. Startup user ’ s s[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 3 20 1 0-09-09 3. With user ’ s permission, erase internal drive(s) con taining Mac OS X, and reinstall it. V erify if installation process c ompletes. Y es Go to step 6. No Go to step 4. 4. Inspect internal drive(s) SA T A power and data cables and connectors for bent pins , or other [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 4 20 1 0-09-09 Hard Driv e Noisy Unlikely cause: L CD panel, logic board, power supply , speakers, camera, microphone Quick Check Symptoms Quick Check Hard Drive Noisy • Noise during star t up • Noise during operation • Noise when drive is copying or saving data 1 . Boot from Insta[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 5 20 1 0-09-09 6. Remove hard drive and v erify if rubber vibration isolation grommets are properly installed in hard drive bracket (attached to hard drive) and to mechanism in rear housing (where hard drive pins insert). Y es Go to step 7 No If grommets are missing or damaged, replace h[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 6 20 1 0-09-09 Optical Drive Not Rec ognized Unlikely cause: L CD panel, power supply , fans, speakers, camera, micr ophone Quick Check Symptoms Quick Check Drive Not Recogniz ed/Mount • Discs inject and ejec t, but do not appear in Finder • V erify that optical media is not physical[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 77 20 1 0-09-09 5. Connect original optical drive to known-good SA T A cable. V erify if both CD and DVD media are read reliably . Y es SA T A cable issue. Replace SA T A cable. Go to step 6. X03 No Replace optical drive. J03 6. T est read compatible known- good CD and DVD media (Install D[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 78 20 1 0-09-09 4. With known-good optical drive installed, test for media inject/ eject. V erify if drive accepts and ejects k nown-good media. Y es Known-good optical drive resolved inject/eject issue. Replace optical drive. J03 No Go to step 7 . 5. Inspect optical drive slot during disc[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 7 9 20 1 0-09-09 Deep Dive Check Result Action Code 1 . V erify if media is free to spin without optical drive scraping edge or sur face of media. Y es Go to step 3 . No Go to step 2 2. Reseat optical drive in enclosure and verify that a media can be inser ted without being scratched Y es [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 80 20 1 0-09-09 Optical Drive Not P er forming to Specications Unlikely cause: L CD panel, power supply , fans, speakers, camera, micr ophone Quick Check Symptoms Quick Check Optical Drive Not P er forming to Specications • Read or write speeds slower than expected 1 . T est optica[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 8 1 20 1 0-09-09 6. Media that is out of balance may not perform well at higher speeds even though higher speeds may be supported by the optical drive. V erify if slowing requested burn s peed allows discs to be written reliably . Y es Media issue. No repair necessary . No Go to step 7 . 7[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 82 20 1 0-09-09 Optical Drive Noisy Unlikely cause: L CD panel, power supply , fans, speakers, camera, micr ophone Quick Check Symptoms Quick Check Optical Drive Noisy (J04) • Noise during boot • Noise during operation • Noise when drive is copying or writing data 1 . T est optical m[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 83 20 1 0-09-09 SD Car d Will Not Inser t Into Slot Unlikely cause: L CD panel, logic board, optical drive, hard drive Quick Check Symptom Quick Check SD Card will not insert into slot • SD Memor y Card does not fully seat into slot • Card slot does not align with enclosure. 1 . The SD[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 84 20 1 0-09-09 SD Car d Not Recognized Unlikely cause: L CD panel, logic board, optical drive, hard drive Quick Check Symptom Quick Check SD Card Not Rec ognized • Card does not show up on desktop or in Syst em Proler 1 . Inser t user’ s SD card into a known-good system and verify [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mass Storage 85 20 1 0-09-09 5. V erify if a known-good unlocked SD card can now be correctly read and written. Y es Go to step 6. No Replace SD reader board . X24 6. Lock the user’ s SD card and verify if it can ’t be written. Y es Issue resolv ed. No Replace SD reader board . M1 7 Uncategorized S[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 86 20 1 0-09-09 C ommunications AirP or t/Bluetooth Issues Quick Check Symptoms Quick Check AirP or t/Bluetooth Issues • Unable to join networks or pair devices • AirP ort card not available • Intermittent devic e or connection dropouts • Limited wireless range 1 . V erify that A[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 8 7 20 1 0-09-09 Deep Dive Check Result A c tion C ode 1 . Open System P roler . AirP ort is listed under Network, while Bluetooth is listed under USB . V erify if both AirP or t and Bluetooth cards are rec ognized. Y es Install all av ailable software updates f or AirP or t/Bluetooth[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 88 20 1 0-09-09 6. (Bluetooth) Verify that computer and known-good Bluetooth device are both in discover able mode. V erify if you can now succe ssfully and reliably pair the device. Y es Issue resolv ed. No Replace Bluetooth ant enna. Go to step 7 . M1 1 7 . (Bluetooth) Re-test with new[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 89 20 1 0-09-09 AirP or t Card K ernel P anic Quick Check Symptoms Quick Check AirP or t Card Kernel P anic • Kernel P anic on star tup • Kernel P anic or freezing while attempting to connect to WiFi networks • Kernel P anic while transferring data on W iF i networks 1 . Isolate OS[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 90 20 1 0-09-09 Ethernet P or t/Device Issue Unlikely cause: L CD display , power supply , hard drive, optical drive, fans Quick Check Symptoms Quick Check Ethernet P or t/Device Issue • No Ethernet device presen t • Unable to access network resource s • Ethernet device shows no co[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 9 1 20 1 0-09-09 4. Check for speed and duplex issues on network. Open System P referenc e > Network; click the Adv anced button, then the Ethernet tab . V erify if the speed and duplex reported are what is expected. Y es Go to step 5 . No Change speed and duplex settings. See ar ticl[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 9 2 20 1 0-09-09 Deep Dive Check Result A c tion C ode 1 . Without any wired input devices connected , and with a known-good wireless mouse or trackapd in discoverable mode , star tup the computer . V erify if computer shows the Bluetooth Mouse Setup Assistant. Y es Bluetooth hardwar e i[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Communications 9 3 20 1 0-09-09 8. With known-good Bluetooth mouse/trackpad paired, verify if the device stays connected . Y es Issue resolv ed. No Inspect and reseat Bluet ooth antenna cable . Replace a damaged antenna cable , or Bluetooth board if its antenna connector is damaged. Go to step 9 . X03 [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 94 20 1 0-09-09 Input/Output Device s Apple Remote Inoperable Unlikely cause: L CD display , power supply , hard drive, optical drive, fans Quick Check Symptoms Quick Check Apple Remote Inoperable • Apple Remote doesn ’t bring up F ront Row • Apple Remote doesn ’t control i[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 95 20 1 0-09-09 4. After clicking “Unpair ” , verify if the computer now re sponds to the Apple Remote. Y es P airing issue. Issue resolved . No P ossible IR board issue. Go to step 5 . 5. Open Apple System P roler . V erify if “IR Receiver ” is listed in USB list of dev[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 96 20 1 0-09-09 Audio: M icrophone Unlikely cause: L CD display , power supply , hard drive, optical drive, fans Quick Check Symptoms Quick Check Audio: Microphone • Microphone not working • Microphone audio garbled • No sound 1 . V erify that no tape, stick y notes , or othe[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 9 7 20 1 0-09-09 5. Inspect microphone cable routing and verify if cable is pinched or damaged. Y es Replace rear housing (microphone cable not available separ ately). L1 4 No Go to step 6. 6. Record sound sample using GarageBand or iM ovie. V erify if sound quality of sound sample[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 98 20 1 0-09-09 3. Connect external speakers or headphones to audio-out port and play a known-good sound le. Verify if sound quality is acceptable. Y es Suspect bad speaker . Go to step 4. No Audio C ODEC or amplier issue suspected. Replace logic board and retest. M09 4. Insp[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 99 20 1 0-09-09 Deep Dive Check Result Action Code 1 . V erify if boot chime is present when system is power ed ON. M ake sure audio output preferenc es are not set to mute and volume is set to mid-range . Y es Go to step 2. No Reset PRAM and retest. 2. Make sure no cables are conn[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 00 20 1 0-09-09 7 . Connect external speakers or headphones to audio-out port and play a known-good sound le. Verify if sound quality is acceptable. Y es Logic board , in ternal speakers, and audio-out port functioning correctly . Return system to user . No Go to step 8. 8. Di[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 0 1 20 1 0-09-09 Camera I ssues Unlikely cause: L CD display , power supply , hard drive, optical drive, fans, speakers, microphone Quick Check Symptoms Quick Check Camera Issue s • Camera not detected • No green LED for camera • Excessiv e blooming • P oor White Balance [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 02 20 1 0-09-09 F ireWire De vice Not Recognized Unlikely cause: L CD display , power supply , hard drive, optical drive, fans Quick Check Symptoms Quick Check Fir eWire Device Not Rec ognized • Fir eWire hard drive not recognized • Fir eWire optical drive not recognized • [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 03 20 1 0-09-09 4. V erify if FireWir e device is recognized with a known- good Fir eWire cable on user ’ s computer . Y es Fir eWire cable issue. Issue resolved . No Fir eWire device may need additional power . G o to step 5 . 5. Using a power ed FireWire hub , and having inst[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 04 20 1 0-09-09 USB Device Not Rec ognized Unlikely cause: L CD display , power supply , hard drive, optical drive, fans Quick Check Symptoms Quick Check USB Device Not Recogniz ed • USB wired keyboard/mouse not recognized • USB external drive not recognized • USB camera no[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 05 20 1 0-09-09 3. V erify if a known-good USB keyboard and mouse are recognized . Y es T est original USB mouse and keyboard. Replace if still not recognized . G o to step 5 . No External USB por ts not functioning. Replace logic board. M1 5 4. With no USB devices connected, res[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 06 20 1 0-09-09 Wired K eyboar d Does Not F unc tion P roperly Quick Check Symptoms Quick Check Wired K eyboard Does Not F unction Properly • Some or all keys on the keyboard don ’t work • Eject key or Caps Lock key doesn ’t seem to w ork • Some keys don’ t work as ex[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 07 20 1 0-09-09 4. Open System P referenc es > Speech. V erify if the “Speak selected text when the key is pressed” check box is selected. Y es The key combination to speak text cannot be used for any other purpose. Either disable, or change to a more rare key combination [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 08 20 1 0-09-09 Ke yboard: Specic Ke ys Do Not Res pond Quick Check Symptoms Quick Check Keyboar d: Specic Keys Do Not Respond • One or more keys do not respond when pr essed • Key sticks • Keycap missing 1 . If wireless keyboard is being used verify that it is proper[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 09 20 1 0-09-09 Deep Dive Check Result Action Code 1 . V erify if computer recognize s keyboard or mouse when plugged into rear USB ports on back of iMac. Y es T est device in all USB ports to ensure all other USB ports are working as expected. Replace logic board if any USB por [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 0 20 1 0-09-09 Wirele ss Input Device Does Not P air Quick Check Symptoms Quick Check Wireless Input Devic e Does Not Pair with c omputer • Apple Wireless Keyboard/Magic Mouse/Magic T rackpad not recognized when pow ered on. • Unable to pair Bluetooth input device with comp[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 1 20 1 0-09-09 Deep Dive Check Result Action Code 1 . (Apple Wireless Keyboard, Magic Mouse, Magic T rackpad) With known-good charged batteries and known-good up to date Mac OS X computer with the Bluetooth device software installed, run the Bluetooth Ser vice Diagnostic utilit[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 2 20 1 0-09-09 5. Reinstall customer ’ s batteries in device and try to pair Bluetooth device using the Bluetooth Setup Assistant. V erify that device can be recognized and used. Y es Issue solved . No Recommend that customer replace batteries . If device had fully charged Ap[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 3 20 1 0-09-09 Apple Wireless Mouse/Magic T rackpad Erra tic T racking Quick Check Symptoms Quick Check Apple Wireless Mouse/Magic T rackpad erratic tracking. • Cursor tracking is jumpy . • T rack ing /Clicking/T apping actions not working • Unresponsiv e tracking and wro[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 4 20 1 0-09-09 Wirele ss Input Device Lose s Connection Quick Check Symptoms Quick Check Wireless Input Devic e Loses Connection • Apple Wireless keyboard, Magic Mouse, Magic T rackpad or other Bluetooth input device loses connection 1 . Check orientation of wireless devic e [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 5 20 1 0-09-09 2. Make sure device is on. In System P referenc es > Bluetooth, selec t device and from the Action menu (gear) choose “Connect” . V erify if device connects successfully . Y es Go to step 7 . No Delete pairing in System Pr eferences . Go to step 3. 3. With[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 6 20 1 0-09-09 Apple Battery Charger Does Not Char ge Batteries Quick Check Symptoms Quick Check Apple Battery Charger Does Not Charge Batterie s • No Amber/Green status LED visible on charger when batteries are installed and charger is connected to A C. • Amber status LED [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Input/Output Devices 1 1 7 20 1 0-09-09 3. V erify if the charger LED will go green when a known-good set of par tly charged NiMH AA batteries was installed and had been left for some hours (up to 5 hours if a fully discharged set was installed in charger). Note : Status LED ma y turn OFF after charge [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 1 8 20 1 0-09-09 Mechanical Noise/Hum/Vibration Unlikely cause: L CD panel, glass panel, enclosure, cables Quick Check Symptoms Quick Check Noise/Hum/Vibration • Buzzing noise • Rattling noise • Ticking noise • Squeaking noise 1 . V erify that the vents on the bottom and back of th[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 1 9 20 1 0-09-09 Deep Dive Check Result Action Code 1 . V erify if any tape , gasket, cable label, or cable is touching the fan blades and causing a ticking noise. Y es Secure the material so it doesn ’t touch fan blades . If tape adhesive has lost its stickiness, replace that section of[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 20 20 1 0-09-09 7 . Remove fans and rotat e blades. V erify if fan blades spin smoothly without interference from fan housing . Y es Go to step 8 No Replace a ected fan. P04 8. Reinstall fans while carefully ensuring that there are no cables routed under or near fan assembly that might [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 2 1 20 1 0-09-09 F an F ailures / Thermal Issues Unlikely cause: speakers Quick Check Symptoms Quick Check F an Failure s / Thermal Issues • System f eels ver y hot • F an(s) not operating • F an(s) running fast • System is noisy 1 . V erify that vents on bottom and back of syst em[...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 22 20 1 0-09-09 2. V erify if noise sounds like one or more fans running faster than expected. Y es F ans running fast. Reset SMC by disconnecting power cor d for ~1 5 seconds then retest. If issue continues go t o step 3. No Go to step 3 . 3. V erify if any tape , gasket, cable label, or [...]

iMac (27-inch, Mid 20 1 0) Symptom Char ts — Mechanical 1 23 20 1 0-09-09 Ph ysical Damage Symptoms Quick Check Phy sical Damage • Broken glass • Bent stand • Broken hinge • Stripped screw/head • Stripped screw boss • Dent or scratch to chassis 1 . V erify if damage caused by user en vironment, accidental damage , or abuse. If applica[...]

© 20 1 0 Apple Inc. All r ights reserved.  Ser vic e Source T ake Apar t iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 25 20 1 0-09-09 General Inf ormation Opening the Unit • The iMac (27-inch, Mid 20 1 0) has a glass panel that attaches t o the front, which must be removed prior to r eplacing any module on the unit. • Impor tant: The glass panel should only be remov ed by Apple-authorized t echni[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 26 20 1 0-09-09 Required Special T ools for Glass P anel Special tools are required t o remove , handle and clean glass panel. • 9 22-825 2 – Suction cups, Pkg of 2 • 9 22-825 3 – Gloves , lint-free , anti-static, Pkg of 2 • 9 22-825 8 – ESD bags, 24”x20” , Pkg of 5. T[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 27 20 1 0-09-09 Cleaning & Handling the Glass P anel F ollow the cleaning procedures in this manual t o ensure the glass panel is free of dust and other par ticles befor e returning the computer to the customer . • The glass panel is not tempered and will break in to sharp piece[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 28 20 1 0-09-09 Handling a Brok en Glass Panel The glass panel is not tempered and will break in to sharp pieces if mishandled . I f the glass is broken it must be carefully remov ed from the unit to preven t irreparable damage to the front sur face of the L CD. If the front sur face [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 29 20 1 0-09-09 3. P eel protective cov ering o the front of the glass. Remove and discard any lar ge pieces of broken glass. 4. Apply a strip of packing tape horizontally across the top and bottom of the glass panel. Next, apply the tape diagonally , across the broken glass panel,[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 30 20 1 0-09-09 5. Continue applying tape horizon tally , thoroughly covering the broken glass. Most of the glass will still be attached to the steel ring that runs around the perimeter of the glass panel. 6. Use a black stick to pry the glass panel o the magnets on the rear housin[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 3 1 20 1 0-09-09 7 . Lift the entire glass panel o the housing. 8. Place the broken glass inside a large bo x, label the box, and dispose of it properly .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 32 20 1 0-09-09 9 . Using a whisk broom, clean the work sur face of tiny glass particles. 1 0. Stand the iM ac up and use a lint free cloth t o carefully brush any of the particles o of the i Mac onto the table . Clean the work sur face again. 1 1 . When the repair is nished the[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 3 3 20 1 0-09-09 Safety W arning: HIGH VOL T A GE : The A C/DC power supply PCB remains power ed up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the fr ont bezel remo ved . • Don’ t work a[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — General Information 1 34 20 1 0-09-09 Logic Board Handling IMPORT ANT : Always use two hands to support the logic board, video card and heatsinks. Handling the board incorrectly could ex the board and damage the chips and circuitry . Ne ver handle the board by the heatsink or video card . Reassembly Ste[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Access Door 1 35 20 1 0-09-09 F irst Steps • Shut down the computer • Place the computer on a clean, at sur face T ools • ESD mat and wrist strap • Phillips #2 screwdriver A cc ess Door[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Access Door 1 36 20 1 0-09-09 Remov al 1 Raise the stand and loosen 3 captive screws. 2 Remove the acce ss door . Important : T o ensure proper cooling , the iMac should not be operated without access door installed .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Memor y 1 3 7 20 1 0-09-09 F irst Steps Remove • Access door Note: This computer uses PC3-1 0600, (1 3 33) DDR3, 204-pin, SO-DIMMs. T ools • ESD mat and wrist strap Memor y[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Memor y 1 38 20 1 0-09-09 Remov al 1 Untuck tabs in the memor y compartment. 2 Pull tab to eject the installed memor y module. Reassembly 1 Orient notch on memor y with notch in the memor y compartment. 2 Pr ess memor y rmly into slot until y ou hear a click. 3 T uck black plastic tabs into memory compa[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Glass Panel 1 39 20 1 0-09-09 F irst Steps • Shut down unit. • Unplug all cables. • Put on ESD strap. Caution: The glass panel is not tempered and will break into sharp piec es if mishandled. A scratched or broken glass panel is not cover ed by warranty . Important: This procedure r equires special t[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Glass Panel 1 40 20 1 0-09-09 Remov al Note: Glass panel is held in place by magnets. Caution: Unlike previous model iMacs, the glass panel has tabs along bottom that align with rear housing. Be careful not to damage tabs when removing glass panel. Apple strongly recommends w earing clean, lint-free glo ve[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Glass Panel 1 4 1 20 1 0-09-09 3 Remove suction cups and slide glass into protective microf oam bag. Reassembly 1 Remove prot ective covering from silic one roller and sticky sheet. 2 Clean silicone roller by rolling it back and forth a few times on sticky sheet. If stick y sheet looks dir ty , use a new o[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Glass Panel 1 42 20 1 0-09-09 3 Set unit in upright position to minimize settling of dust. 4 Roll silicone roller over L CD panel to remove an y par ticles. 5 Remove glass panel from microfoam bag . 6 Clean INSIDE of glass panel with the silicone roller to remove dust. Note: If ngerprints or oils are on[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Glass Panel 1 43 20 1 0-09-09 7 W earing clean gloves , place glass directly onto unit, aligning tabs along the bottom with notches in rear housing . Magnets will catch it and hold it in place. Make sure the glass is ush with the rear housing after it is reinstalled. 8 Clean outside of glass panel with [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera 1 44 20 1 0-09-09 F irst Steps Remove • G lass panel T ools • M agnetized T or x T1 0 screwdriver • Black stick • ESD-wr ist strap and mat Camer a[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera 1 45 20 1 0-09-09 Remov al 1 Remove 2 T1 0 screws: • 9 22-9 23 9 2 Lift camera bracket out of rear housing . 3 Disconnect camera cable from camera board.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera 1 46 20 1 0-09-09 Reassembly 1 Thermal paste is required between the camera and rear housing. Reuse the thermal paste. 2 Use a black stick to remove and r eapply paste to camera (areas circled in graphic). Note : A syringe of thermal paste is available as needed , par t number 9 22- 9625 , good f or[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 47 20 1 0-09-09 F irst Steps Remove • G lass panel Caution: Do not press on front surface of L CD panel when handling. T ools • M agnetized T1 0 screwdriver • ESD-wr ist strap and mat • ESD bag to store L CD panel L CD P anel[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 4 8 20 1 0-09-09 Remov al 1 Remove 8 T1 0 screws: 9 22-9 246 Reassembly Note: Do not overtighten L CD screws, which could cause light leakage after unit is reassembled . 2 With computer standing up and facing you, pull the L CD for ward slightly from the top edge to access 4 cables inside . CA[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 49 20 1 0-09-09 3 Looking down into the computer , on the left side, disconnect the vertical sync cable from the top of the backlight board. Pull straight up . W ARNING: HIGH VOL T AGE Use extreme caution when working around the pow er supply , which contains a high- voltage capacitor that may[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 50 20 1 0-09-09 4 Pull dis play forward slightly to disconnect: • #1: back light power cable at bottom of backlight board. Pinch and pull cable down from connector • #2: display temp sensor cable next to the AirP or t cable. Pull straight up 5 T o the right of the display t emp sensor , ca[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 5 1 20 1 0-09-09 6 Gently remove the DisplayP or t cable. • S queeze side metal tabs (#1) to release and pull cable (#2) up from connector . 7 Lift the L CD panel o rear housing. Important: Panel Handling information : • handle the panel by the edges only • use two hands to lift and m[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 52 20 1 0-09-09 8 Without touching the panel sur face , carefully store the L CD panel in an antistatic bag . Note : If replacing the panel: • remove aluminum tape securing DisplayP or t cable • transfer the DisplayP or t cable to the new panel • secure DisplayP or t cable to the panel c[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 53 20 1 0-09-09 Handling the P anel 1 Important : Handle L CD panel by the edges only . Use two hands to carr y the panel. 2 Never touch L CD sur face or hold L CD panel with one hand. It could damage the panel.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 54 20 1 0-09-09 Reassembly 1 The panel is heavy! Lift panel and rest it on the “ chin ” of the rear housing. 2 Lean panel t oward the rear housing . 3 Connect the DisplayP or t cable. • S queeze side metal tabs (#1) to insert cable into connector (#2). Push cable rmly into connector .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 55 20 1 0-09-09 4 I In the following or der , connect: • #1: displa y temp sensor • #2: backlight power 5 Pr ess sticky DisplayP or t cable onto the video card bracket.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LCD P anel 1 56 20 1 0-09-09 6 Connect the vertical sync cable to the backlight board. 7 Replace 8 panel screws.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — V er tical Sync Cable ( Vsync) 1 57 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • Black stick Remov al 1 With a black stick, peel back mylar tape to expose cable. 2 Pull cable straigh t out of connector . Replacement Note: Inser t Vysnc securely into panel connector , replace m[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LED T emp S ensor Cable 1 58 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • Black stick Remov al 1 P eel black insulator to access cable. 2 Disconnect sensor from bracket. Replacement Note: Inser t sensor securely into bracket. Replace foam ov er sensor to isolate the sensor fro[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — DisplayP ort Cable 1 59 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools No tools are required f or this procedure . Remov al 1 P eel back mylar tape securing cable to L CD panel. Displa yP or t C able[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — DisplayP ort Cable 1 60 20 1 0-09-09 2 P eel back aluminum tape securing DisplayP or t cable to panel connector . Replacement Note: A replacement Dis playP or t cable will come with: • a piece of black mylar tape • a piece of aluminum tape 3 Pr ess in on metal side release clips and then gently pull do[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Audio P or ts and Cable 1 6 1 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • T or x T1 0 screwdriver • ESD mat and wrist strap A udio P or ts and C able[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Audio P or ts and Cable 1 62 20 1 0-09-09 Remov al 1 Disconnect audio cable from logic board and remov e 2 T1 0 screws. • 9 22-9 245 2 Remove cable from rear housing. Reassembly Note: • A black stick can be helpful for guiding and aligning audio ports with rear housing . • Plugging in the earbuds or [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Antenna 1 63 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • M agnetized T or x T8 screwdriver • ESD-wr ist strap and mat AirP or t An tenna[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Antenna 1 64 20 1 0-09-09 Remov al 1 Disconnect antenna cable from AirP or t card. W ARNING : Be careful not to damage AirP or t antenna connectors as it may induce antenna or rear housing replacement (lower ant enna, near Apple logo , is part of rear housing). 2 P eel up EMI tape securing antenna [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Card 1 65 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • M agnetized T or x T6 screwdriver • ESD-wr ist strap and mat AirP or t Ca rd[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Card 1 66 20 1 0-09-09 Remov al 1 Remove 1 T6 screw . • 9 22-85 79 2 Disconnect 2 AirP or t antenna cables . Important : Antenna cables and connectors are delicate . If the shor ter of the two antenna cables is damaged, you will need to replace the rear housing. 3 Hold card by edges and pull it o[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Carrier Board 1 67 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • AirPort card T ools • M agnetized T or x T1 0 screwdriver • ESD-wr ist strap and mat AirP or t Ca rrier Board[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Carrier Board 1 68 20 1 0-09-09 Remov al 1 Remove Kapton tape securing AirP ort data cable to carrier board. 2 Disconnect Airpor t data cable. 3 Remove 2 T1 0 screws: • 9 22-6850 4 Lift AirP or t carrier board from rear housing. Replacement Note : Secure both ends of the AirP or t cable with Kapt[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Cable 1 69 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • AirPort carrier board T ools • ESD-wr ist strap and matt • black stick AirP or t Cable[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — AirPort Cable 1 70 20 1 0-09-09 Remov al 1 With a black stick, remove Kapton tape (wrapped around carrier board) securing the AirP ort cable to the carrier board. 2 Lift AirP or t cable o carrier board. 3 Remove Kapton tape securing AirP ort cable to logic board . Lift cable straight up from board. Repl[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Antenna 1 7 1 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • M agnetized T or x T8 screwdriver • ESD-wr ist strap and mat Bluetooth An tenna[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Antenna 1 72 20 1 0-09-09 Remov al 1 Remove 2 T8 screws on antenna board: • 9 22-47 23 2 Disconnect Bluetooth antenna from the Bluetooth card . 3 Remove an tenna from housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Board 1 7 3 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • M agnetized T or x T8 screwdriver • ESD-wr ist strap and mat Bluetooth Board[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Board 1 7 4 20 1 0-09-09 Remov al 1 Disconnect 2 cables: • Bluetooth antenna • Bluetooth data cable 2 Remove 1 T8 screw : • 9 22-9 24 7[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LED Back light Board 1 7 5 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel W arning: HIGH VOL T A GE Use extreme caution when working around the capacitors in the top right corner of the backlight board , which contain high-voltage that may remain char ged for sever al minutes even when com[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — LED Back light Board 1 76 20 1 0-09-09 Remov al W arning: HIGH VOL T A GE If the computer is shut down by remo ving the power cor d, allow the backlight board a good 2-3 minutes to dischar ge the capacitors before handling it. However , if you select “Shut Down ” via the Apple menu, the computer will d[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply 1 77 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel W ARNING: HIGH VOL T AGE Use extreme caution when working around the power supply , which contains a high-voltage capacitor that may r emain charged for sev eral minutes even when the computer is unplugged . Never touch the [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply 1 78 20 1 0-09-09 Remov al W ARNING: HIGH VOL T AGE If the computer is shut down by remo ving the power cor d, allow the power supply a good 2-3 minutes to dischar ge the capacitors before handling it. However , if you select “Shut Down ” via the Apple menu, the computer will discharge th[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply 1 79 20 1 0-09-09 2 Disconnect 2 cables: • DC power (top cable) • AC pow er inlet (taped to pressure w all) Reassembly 1 Route AC pow er inlet cable over pow er supply pressure wall. 2 Connect AC pow er cable and tuck edge of connector under logic board. 3 Pr ess cable into notches on pre[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Back light Pr essure W all 1 80 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply T ools • ESD mat and wrist strap Back light P re ssure W all[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Back light Pr essure W all 1 8 1 20 1 0-09-09 Remov al 1 Lift pressure wall o posts in the rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply/Hard drive Pr essure W all 1 82 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply T ools • ESD mat and wrist strap P ow er Supply/Hard driv e P re ssure W all[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply/Hard drive Pr essure W all 1 83 20 1 0-09-09 Remov al Lift pressure wall o posts in the rear housing . Reassembly 1 Note: Make sure the camera and AC inlet cables are routed correctly around the pressure wall. 2 The camera cable runs along the right side of the pressure wall, nex t to hard[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Po wer Supply/Hard drive Pr essure W all 1 8 4 20 1 0-09-09 3 Connect AC inlet cable and then press cable into notche s on top of the pressure wall. 4 Replace Kapton tape securing AC inlet cable to pressure w all.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive 1 85 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel T ools • M agnetized T or x T1 0 screwdriver • ESD-wr ist strap and mat Har d Driv e[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive 1 86 20 1 0-09-09 Remov al 1 Remove 2 T1 0 screws from mounting bracket: • 9 22-6850 2 Disconnect 2 cables: • HD power cable • HD data cable 3 Lea ve small HD temp sensor cable attached to drive. 4 Slide hard drive up slightly to lift pins out of 2 rubber grommets on mounting bracket. 5 Di[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive 1 87 20 1 0-09-09 Reassembly 1 If installing a replacement hard drive, transfer the following: • hard drive bracket • 2 T1 0 bracket screws 9 22-9 1 36 • 2 T1 0 screw pins 9 22-700 1 2 Note: Each hard drive vendor has a unique sensor cable. Do not mix and match temp sensor cables. 3 Import[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive Sensor Cable 1 88 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Hard drive Note: Each hard drive manufacturer has a di erent type of sensor cable, which is included with a replacement drive . If replacing sensor cable only , be sure to order correct cable for drive manuf[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive Sensor Cable 1 89 20 1 0-09-09 Remov al 1 Disconnect hard drive sensor cable from hard drive and logic board. Note: Do not reuse temp sensor cable. A new sensor cable is included with each replacement drive . Each hard drive manufacturer has a unique sensor cable. Reassembly 1 Important: When in[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive 1 90 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel Important : When ser vicing the optical drive, handle it by the edges only . Pre ssing elsewhere on the drive could damage the internal mechanism. T ools • T or x T1 0 screwdriver • ESD-wr ist strap and mat Optical Driv [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive 1 9 1 20 1 0-09-09 Remov al 1 Remove 4 T1 0 screws. • 9 22-6850 2 Lift optical drive slightly and wiggle optical drive cable o optical drive. A black stick may be helpful. 3 Pull optical a way from slot opening in housing. Note : A replac ement optical drive includes the bezel. Do not re[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive 1 92 20 1 0-09-09 4 Disconnect optical sensor cable from connector on logic board.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive 1 93 20 1 0-09-09 Reassembly 1 If installing a replacement optical drive, a temp sensor/ cable is included with each replacement optical drive. 2 Install optical drive by aligning pins on bezel with holes on optical drive. Check the felt on the optical drive opening. Damaged or wrinkled felt [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive 1 94 20 1 0-09-09 3 Replace screws in order shown. Note : Insert a disc into the optical drive to check that optical drive is correctly aligned with the rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Sensor Cable 1 95 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Optic al drive Important : When ser vicing the optical drive, handle it by the edges only . Pre ssing elsewhere on the drive could damage the internal mechanism. T ools • ESD-wr ist strap and mat Optical S ensor[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Sensor Cable 1 96 20 1 0-09-09 Remov al 1 Disconnect optical sensor cable from logic board. 2 P eel up foam gasket to release sensor end of cable. Replacement Note: A replacement optical drive will include a new sensor cable.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive F an 1 97 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Optic al drive T ools • T or x T1 0 screwdriver • ESD-wr ist strap and mat Optical Driv e F an[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive F an 1 98 20 1 0-09-09 Remov al 1 Remove 1 T1 0 screw. • 9 22-9 236 2 Disconnect fan cable from logic board . 3 Lift fan o 2 guide posts in rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SD Card Reader 1 99 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel Important : The SD card reader must be replaced like-for-like, with an SD card reader with the same EEE code. T ools • T or x T8 screwdriver • ESD-wr ist strap and mat • black stick SD Ca rd Reader[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SD Card Reader 200 20 1 0-09-09 Remov al 1 Remove 1 T8 screw : • 9 22-9 24 1 2 Disconnect cable and with a black stick, pr y SD card reader up and out of rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SD Card Reader 20 1 20 1 0-09-09 Reassembly The SD card reader must be replaced like-for-like, with an SD card reader that has the same EEE code. 1 Look at the sticker on the underside of old SD card reader . 2 The EEE code will read DDHF or 6DW . 3 Compare old SD car d reader to both parts in the kit and [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SD Card Reader Cable 202 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Optic al drive • Optic al drive fan Note: The SD card and SD cable are also part of the rear housing assembly . T ools • ESD-wr ist strap and mat SD Ca rd Reader C able[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SD Card Reader Cable 203 20 1 0-09-09 1 P eel back aluminum tape that cov ers the exposed por tion of the SD cable. 2 Disconnect cable from SD card reader and logic board.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — IR Board and Cable 204 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel Note : A new IR board includes a new cable. The cable is not available as a separate part. T ools • ESD-wr ist strap and mat • black stick IR Board and C able[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — IR Board and Cable 205 20 1 0-09-09 Remov al 1 Remove Kapton tape to access IR cable connector . 2 Disconnect IR cable from logic board . Pull cable straight up to release. 3 With 2 ngers, wiggle IR mounting bracket up and o mounting post. Replacement Note: With your nger , pull front housing out [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 206 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory Note : The SSD-only CT O option will have an HDD temp sensor jumper (9 22- 9628) in the HDD temp sensor connector locat[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 207 20 1 0-09-09 Remov al 1 Carefully disconnect 1 4 cables from the logic board. (1) power button (2) CPU fan (3) skin temp sensor (4) hard drive temp sensor or HD jumper if SSD-only cong (5) hard drive fan (6) camera (7) Bluetooth (8) ambient temp sensor (9) AirP or t (1 0) microphone (1 1[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 208 20 1 0-09-09 3 Remove 8 T1 0 screws, (in graphic: S=short, M=medium, L=long) • 9 22-6800, (2) shor t • 922-9 23 7 , (2) 20mm, medium • 9 22-9 243, (4) 24mm, long 4 Gently pull board forward and disconnect 2 or 3 cables (depending on the conguration) on the back side of logic board.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 209 20 1 0-09-09 5 Carefully lift board up and out of rear housing. Handling the Logic Board Important : Always use 2 hands to support board and heatsink. Handling board incorrectly could ex board and damage chips and circuits. Never handle board by heatsink or metal frame.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 0 20 1 0-09-09 Reassembly 1 Remove HD temp sensor jumper if present (applie s to SSD-only congs). Important : If jumper is not transferred to replacement logic board on SSD-only congs, the fans will run at full speed . 2 V erify that tamper indicator labels on front and back of heatsi[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 1 20 1 0-09-09 3 T ransfer: • memor y (install after logic board is in place) • video card • optical, HDD, & SSD data cables 4 Apply new Ethernet ID label (included in box with new logic board) to bottom of stand. 5 Use the Blank Board Serializer tool to set computer’ s serial n[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 2 20 1 0-09-09 7 Low er board into rear housing. Connect 2-3 cables on the back side, depending on the drive conguration: • DC power cable (#1) • SSD data cable (#2) • HD data cable (#3 Important! Mak e sure the DC P ower cable is securely inserted into connector .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 3 20 1 0-09-09 8 Check that the video card cable is connected to the back side of the board 9 Observe how the optical data cable routes o ver top of DC power cable and extends out to the side. Keep the optical cable out of the way as the board is lower ed into place.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 4 20 1 0-09-09 1 0 As y ou the lower board , position cables into low est notch on pressure wall. Note : Line up board with edge of CPU fan and screw standos. 1 1 Connect 1 4 cables to the logic board. (1) power button (2) CPU fan (3) skin temp sensor (4) hard drive temp sensor or HD jum[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Logic Board 2 1 5 20 1 0-09-09 1 2 Insert cable connectors into the I/O por ts to align the board to the ports before replacing the screws. 1 3 Replace 8 T1 0 screws S=short (2) M=medium (2) L=long (4)[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Video Card 2 1 6 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • T or x T8 screwdriver • T or x T1 0 screwdriver • ESD-wr ist strap and mat Video Car d[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Video Card 2 1 7 20 1 0-09-09 Remov al 1 Remove 3 screws attaching video card to bracket. • (1) 9 22-7 97 1, T1 0 • (2) 9 22-47 23, T8 2 Disconnect video card temp sensor from logic board. 3 Support video card as you slide card and heatsink out of slot on logic board. Replacement Note: If you replace t[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Video Card 2 1 8 20 1 0-09-09 1 T o remove the bracket, remove 3 T8 screws on front side of logic board. • 9 22-47 23 2 Carefully slide video bracket o logic board. Be careful not to bump DisplayP or t connector as you slide the bracket o .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Solid State Drive (SSD) 2 1 9 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board Note : The SSD-only option will have an HDD t emp sensor jumper (9 22-9628) in the HDD te[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Solid State Drive (SSD) 220 20 1 0-09-09 Remov al 1 Note : T here are two SSD drive congs: • HDD + SSD or , • SSD-only This graphic shows the HDD + SSD conguration. 2 Disconnect 3 cables from the cable bundle: • HDD data & power cables (A) • SSD data cable (B) • SSD power cable (C) 3 Re[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Solid State Drive (SSD) 22 1 20 1 0-09-09 4 Use a black stick to pr y pressure w all o rear housing. Dotted lines represen t adhesive on under side of pressure wall. Exert some force to release adhesive . 5 Lift pressure wall and SSD drive from rear housing. 6 T urn pressure wall over . Remove 4 screws [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Solid State Drive (SSD) 222 20 1 0-09-09 Reassembly 1 Make sure the Bluetooth cable routes o ver the top of the SSD drive and pressure wall. 2 On SSD-only congs (no Hard drive), make sure HDD temp sensor jumper is connected to HD temp sensor connector on logic board. If jumper is absent, the fans will r[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SSD Data Cable 223 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • ESD-wr ist strap and mat SSD Da ta Cable[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — SSD Data Cable 224 20 1 0-09-09 Remov al 1 Disconnect SSD data cable from top of SSD drive. Replacement Note : The SSD cable connects to the middle connector of three connectors at the top of the SSD drive. The connector on the left (closest to the hard drive) is unused.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical/MXM Pressure Wall 2 25 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • T or x T1 0 screwdriver • ESD-wr ist strap and mat Optical/MXM P ressur e W[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical/MXM Pressure Wall 2 26 20 1 0-09-09 Remov al Note : Observe the Bluetooth and microphone cable routing before r emoving the pressure wall. The Bluetooth cable routes over the pre ssure wall and the microphone cable routes under (illustra tion shows a non-SSD cong). On SSD congs the Bluetooth [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive Data Cable 22 7 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board Note : One end of hard drive data cable attaches to back side of logic board. T ools • ESD[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive Data Cable 22 8 20 1 0-09-09 Remov al 1 Disconnect hard drive data cable from side of hard drive. 2 Disconnect other end from back side of logic board.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive Data Cable 229 20 1 0-09-09 Replacement Note : As you low er logic board , route DC power cable and hard drive cable into not ch on pressure wall.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive Data Cable 230 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board Note: Optical drive data cable attaches to back side of logic board. T ools • ESD-wr ist[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Optical Drive Data Cable 23 1 20 1 0-09-09 Remov al Disconnect optical data cable from back side of logic board. Replacement Note: Hold the optical cable with your thumb as you lower the logic board in to rear housing. Make sure optical data cable: • routes over the top of the DC power cable • ex tends[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Batter y 23 2 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board Note : Battery is located on the back side of logic board. T ools • Black stick • ESD mat and wrist s[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Batter y 23 3 20 1 0-09-09 Remov al 1 Use a black stick to pr y battery from battery sock et on back side of logic board. Reassembly 1 Make sure battery socket is open and free of dust. 2 Pr ess battery (92 2- 9626) into socket with engraved markings (+ side) facing up.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Right Speak er 234 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • Audio por ts • IR board • M emory • Logic board T ools • T or x T1 0 screwdriver • ESD-wr ist strap and mat R ight Speak er[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Right Speak er 23 5 20 1 0-09-09 Remov al 1 Remove 1 T1 0 screw. • 9 22-9 242 2 Rotate speaker to the left and lift out of rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — CPU F an 236 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • T or x T1 0 screwdriver • ESD-wr ist strap and mat CPU F an[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — CPU F an 23 7 20 1 0-09-09 Remov al 1 Remove 2 T1 0 shoulder screws. • 9 22-9 236 2 Lift fan up and out of rear housing. 3 Note guidepot on fan that will t into bottom of rear housing on reassembly . 4 Note routing of ambient temp sensor cable and left speaker cable through clips on fan. 5 Remove ambi[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — CPU F an 238 20 1 0-09-09 Reassembly 1 Route sensor cable through clip on fan. 2 Route ambient sensor cable under fan and along with fan cable, route through clip on the side of fan.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Ambient T emp Sensor 239 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board • CPU fan T ools • Black stick • ESD-wr ist strap and mat Ambien t T emp Sensor[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Ambient T emp Sensor 240 20 1 0-09-09 Remov al 1 Note routing of temp sensor cable through clips on fan. 2 Release sensor cable from 2 cable clips on CPU fan. Replacement Note: If you are replacing CPU fan, transfer sensor cable to replacement CPU fan. Reassembly Route ambient sensor cable under fan and al[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Left Speaker 24 1 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board • CPU fan T ools • M agnetized T or x T1 0 screwdriver • ESD-wr ist strap and mat L ef t Speake[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Left Speaker 242 20 1 0-09-09 Remov al 1 Remove 1 T1 0 screw. • 9 22-82 49 2 Lift speaker out of rear shousing. Reassembly 1 Route speaker cable around bottom of CPU fan and through clip on side of CPU fan.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Left Speaker 243 20 1 0-09-09 2 Route speaker cable above A C power inlet and toward right speaker . T uck speaker cable under cable clips in rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive F an 244 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • M agnetized T or x T1 0 screwdriver • ESD-wr ist strap and mat Har d Driv e F an[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Hard Drive F an 245 20 1 0-09-09 Remov al 1 Remove 1 T1 0 screw. • 9 22-9 236 2 Pull the fan straigh t up and o the guide posts.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Mechanism Cover 246 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board • Hard drive fan • Optic al pressur e wall T ools • ESD-wr ist strap and mat • M agnetized [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Mechanism Cover 247 20 1 0-09-09 Remov al 1 P eel up aluminum tape. 2 Remove 4 T1 0 screws; two at the top (bigger screws) and two smaller screws at the bottom. • (2) 922-6800 • (2) 9 22-9 23 8 (same screws as mechanism) 3 Pry cover o mechanism.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Stand 248 20 1 0-09-09 F irst Steps No preliminary steps are required to remo ve the stand. T ools • T or x T1 0 screwdriver • Access card to lock/ unlock the stand • ESD-wr ist strap and mat Stand[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Stand 249 20 1 0-09-09 Remov al 1 Place the computer face down on a table so that the base of the stand extends over the table edge . 2 Pr ess the stand down and insert an access card into the slot between the top of the stand and the rear housing. 3 Insert the card as far as it will go , and press the sta[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Stand 250 20 1 0-09-09 5 Remove 8 T1 0 screws. • 9 22-8 1 7 4 6 Separate the stand from the clutch mechanism. Reassembly 1 Align the pin on the clutch mechanism to the central hole in the stand. 2 Replace 8 T1 0 screws. 3 Place the computer face down on a table so that the base of the stand extends over [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Stand 25 1 20 1 0-09-09 4 Insert the access card as far as it will go. Gently lift the stand approximat ely two inches to unlock the clutch mechanism, and then remove the access card . T he clutch mechanism should now be unlocked. 5 Stand the computer upright.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Mechanism 252 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board • Hard drive fan • Optic al pressur e wall • M echanism cov er • Stand T ools • M agnetized T o[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Mechanism 253 20 1 0-09-09 Remov al 1 Remove 6 T1 0 screws: • 9 22-9 23 8 2 Lift mechanism o rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Cable 254 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • Logic board T ools • ESD-wr ist strap and mat Bluetooth C able[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Cable 25 5 20 1 0-09-09 Remov al 1 Disconnect the black Bluetooth cable from Bluetooth board 2 F ollow cable along to the right....to the right of the mechanism.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Bluetooth Cable 256 20 1 0-09-09 3 P eel back EMI tape securing Bluetooth cable to rear housing Lift cable from rear housing. Replacement Note : The cable routes over the notch of the optical pressure wall and connects to the top of the logic board Note : In the SSD drive conguarations , the Bluetooth c[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera Cable 25 7 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Camera • Hard drive • Pow er supply • Pow er supply pressure w all T ools • ESD-wr ist strap and mat Camer a Cable[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera Cable 258 20 1 0-09-09 Remov al 1 Disconnect camera cable from camera board at top of rear housing. 2 Disconnect camera cable (#5) from the top of logic board .[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Camera Cable 259 20 1 0-09-09 3 Remove EMI tape at top of camera cable. Lift pressure wall to remove camer a cable from rear housing . Replacement Note : The camera cable runs along the right side of the pressure wall, nex t to the hard drive and through the lower notch in the pressure wall.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Cable, AC/DC P ower/Backlight/SA T A 260 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • AirPort Carrier • Logic board T ools • ESD-wr ist strap and mat Cable , A C/DC P ow er[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Cable, AC/DC P ower/Backlight/SA T A 26 1 20 1 0-09-09 Remov al 1 Observe cable routing for reassembly . 2 Release cable from cable clips and lift out of rear housing . Replacement Note : The bottom section of cable bundle routes through the lower notch on the optical pressure wall.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Cable, AC/DC P ower/Backlight/SA T A, SSD 262 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Pow er supply • B acklight pressure wall • Optic al drive • Optic al fan • IR board • M emory • AirPort card • AirPort carrier • Logic board T ools • M agnetized T or x T1 0 s[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Cable, AC/DC P ower/Backlight/SA T A, SSD 263 20 1 0-09-09 Remov al 1 Disconnect SSD drive power cable from t op of SSD drive. 2 Release cable from black cable clips and lift out of rear housing.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Cable, AC/DC P ower/Backlight/SA T A, SSD 264 20 1 0-09-09 Replacement Note : The bottom section of cable bundle routes through the lower notch on the optical pressure wall.[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — M icrophone Cable 265 20 1 0-09-09 F irst Steps The microphone cable is par t of the rear housing and is not available as a separate part. Refer to the rear housing procedure . Microphone Cable[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Rear Housing 266 20 1 0-09-09 F irst Steps Remove • G lass panel • LCD panel • Camera • Bluetooth board • AirPort cable • AirPort carrier board • B acklight board • Pow er supply • Hard drive • SSD drive (CTO option) • Bluetooth cable • Camera cable • Camera • Optic al drive •[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Rear Housing 267 20 1 0-09-09 Reassembly When replacing the rear housing follow these impor tant steps: 1 Handling: Handling the rear housing incorrectly could ex aluminum and cause alignment issues. Always handle r ear housing with 2 hands in the lower left and right corners. Never carry rear housing w[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Rear Housing 268 20 1 0-09-09 3 Remove f oil tape and gaskets. Examine plastic tabs under foil tape. Notice that some tabs go on the outside sur face and some on inside sur face of the drive. 4 Remove 4 bez el screws, 2 on each side. 5 Remove old bez el and install new bezel, taking care that tabs are prop[...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Rear Housing 269 20 1 0-09-09 9 T ransfer Camera and Reuse Thermal Paste: T ransfer camera from old rear housing to new rear housing and reuse thermal paste from old rear housing . Use a black stick to remove and r eapply thermal paste to camera (circled). Note : A syringe of thermal paste is available as [...]

iMac (27-inch, Mid 20 1 0) T ake Apart — Rear Housing 270 20 1 0-09-09 1 1 Place the two new pieces of aluminum tape over the right and left sides of the mechanism cover 1 2 T ransfer: • Bluetooth and AirP or t antennas • Bluetooth cable • camera cable • 3 pressure walls 1 3 Replace the remaining modules.[...]

© 20 1 0 Apple Inc. All r ights reserved.  Ser vic e Source A dditional P rocedur es iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) Additional Procedure s — Retrieving Mechanism 272 20 1 0-09-09 Overview Without a stand or VESA mount installed , the mechanism can retract inside the computer if an access card trips the latch that locks the mechanism. In the rare even t that retrieving the mechanism is necessary , f ollow this procedure . Note : Y ou [...]

iMac (27-inch, Mid 20 1 0) Additional Procedure s — Retrieving Mechanism 273 20 1 0-09-09 Remov al 1 Place computer fac e down on a clean, sof t sur face. 2 P eer into stand slot to see recessed la tch. Latch is a shiny metal spring clip located above mechanism that is almost as wide as stand slot. 3 Cut access car d in half vertically , int o tw[...]

iMac (27-inch, Mid 20 1 0) Additional Procedure s — Retrieving Mechanism 27 4 20 1 0-09-09 5 Notice shape of retrieval tool. When inser ting retrieval t ool, make sure cur ved end of tool is down, as shown. 6 The small hole on end of retrieval tool will hook onto pin on recessed mechanism. 7 Hold access card so latch is pushed as far as possible.[...]

iMac (27-inch, Mid 20 1 0) Additional Procedure s — Retrieving Mechanism 27 5 20 1 0-09-09 1 0 When you can pull up mechanism and see it emerge through slot, maintain pull for ce on retrieval tool, but remove acc ess card. 1 1 Pull up mechanism until it clicks or locks into place . 1 2 Mechanism is now ready to accept installation of stand or VES[...]

© 20 1 0 Apple Inc. All r ights reserved.  Ser vic e Source Views iM ac (2 7-inch, Mid 20 1 0)[...]

iMac (27-inch, Mid 20 1 0) Views — Exploded Views 277 20 1 0-09-09 Exploded Views Exploded View #1[...]

iMac (27-inch, Mid 20 1 0) Views — Exploded Views 278 20 1 0-09-09 Exploded View #2[...]

iMac (27-inch, Mid 20 1 0) Views — Exploded Views 279 20 1 0-09-09 Exploded View #3[...]

iMac (27-inch, Mid 20 1 0) Views — External Views 280 20 1 0-09-09 Ex ternal V iews Rear View[...]

iMac (27-inch, Mid 20 1 0) Views — External Views 28 1 20 1 0-09-09 P or ts 1 - Headphone out/optical digital audio out port 2 - Audio in/optical digital a udio in por t 3 - USB 2.0 por ts (4) 4 - FW 800 por t 5 - Mini DisplayP or t 6 - Ethernet port (1 0/1 00/1 000 Base-T )[...]

iMac (27-inch, Mid 20 1 0) T ake Apar t — Internal V iews 282 20 1 0-09-09 In ternal Views Photo of C omponents below L CD[...]

iMac (27-inch, Mid 20 1 0) T ake Apar t — Internal V iews 283 20 1 0-09-09 Photo of C omponents in the Rear Housing[...]

iMac (27-inch, Mid 20 1 0) T ake Apar t — Internal V iews 284 20 1 0-09-09 Logic Board , Fron t Side[...]

iMac (27-inch, Mid 20 1 0) T ake Apar t — Internal V iews 285 20 1 0-09-09 Logic Board , Back Side[...]

iMac (27-inch, Mid 20 1 0) Views — Screw Chart 286 20 1 0-09-09 Scre w Char t Note : Screws ar e not to scale. 92 2-92 46 T1 0 L CD panel (8) 92 2-92 39 T1 0 Camera (2) 92 2-47 23 T8 Bluetooth antenna (2), AirP or t antenna (2), video card (2), video card bracket (3) 92 2-92 47 T8 Bluetooth board (1) 92 2-85 79 T6 AirP or t card (1) 92 2-6850 T1 [...]

iMac (27-inch, Mid 20 1 0) Views — Screw Chart 287 20 1 0-09-09 92 2-92 36 T1 0 Optical fan (1), CPU fan (2), Hard drive fan (1) 92 2-6800 T1 0 Logic board , short (2), Mechanism cover , small (2) 92 2-92 3 7 T1 0 Logic board , medium 2 0mm (2) 92 2-92 43 T1 0 Logic board , long , 2 4mm (4) 92 2-92 42 T1 0 Right speaker (1), Left speaker (1) 92 2[...]