Lenovo A720 manual

IdeaCentr e A720 Har dwar e Maint enance Manual i d e a i d e a i d e a C e nt r e i d e a[...]

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IdeaCentr e A720 Har dwar e Maint enance Manual[...]

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Contents Chapter 1. About this manual . . . . . . 1 Important Safety Information . . . . . . . . . . 1 Chapter 2. Safety information . . . . . . 3 General safety . . . . . . . . . . . . . . . . 3 Electrical safety . . . . . . . . . . . . . . . 3 Safety inspection guide . . . . . . . . . . . . 5 Handling electrostatic discharge-sensitive devices . .[...]

iv IdeaCentre A720Hardwar e Maintenance Manual[...]

Chapter 1. About this manual This manual contains service and r eference information for IdeaCentr e A720 computers listed on the cover . It is intended only for tr ained servicers who ar e familiar with Lenovo computer pr oducts. Before servicing a L enovo pr oduct, be sur e t o read the Safety Information. The description of the TV -tuner car d i[...]

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Chapter 2. Safety information This chapter contains the safety information that you need to be familiar with before servicing a computer . General safety F ollow these rules to ensur e general safety: • Keep the ar eas ar ound the computer clear and clean during and aft er maint enance. • When lifting any heavy object: 1. Ensure you can stand s[...]

Observe the following rules when working on electrical equipment. Important: Use only appr oved t ools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical curr ents. Many customers have rubber oor mats near their equipment that contain small conductive bers[...]

– Switch off power . – Send another person to get medical aid. Safety inspection guide The intent of this inspection guide is to assist you in identifying potential hazards posed by these products. Each computer , as it was designed and built, had r equired safety it ems installed to protect users and service personnel from injury . This guide [...]

• Keep the parts in prot ective packages until they are insert ed into the pr oduct. • A void contact with other people while handling the part. • Wear a gr ounded wrist strap against your skin t o eliminate static on your body . • Pr event the part from touching your clothing. Most clothing is insulative and retains a charge even when you [...]

T o Connect T o Disconnect 1. T urn everything OFF . 2. First, attach all cables to devices. 3. Attach signal cables to connectors. 4. Attach power cor ds to outlet. 5. T urn device ON. 1. T urn everything OFF . 2. First, r emove power cords from outlets. 3. Remove signal cables from connectors. 4. Remove all cables fr om devices. CA UTION: When re[...]

≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) CA UTION: Use safe pr actices when lifting. CA UTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have mor e than one power cord. T o remove all electrical current from t[...]

Chapter 3. Gener al information This chapter provides general information that applies t o all comput er models cover ed by this manual. Specications This section lists the physical specications for your computer . This section lists the physical specications for your computer . T ype IdeaCentre A720 This section lists the physical speci?[...]

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Chapter 4. Gener al Checkout Attention: The drives in the computer you are servicing might have been r earranged or the drive startup sequence may have been changed. Be extr emely careful during write operations such as copying, saving, or formatting. Data or progr ams can be overwritt en if you select an incorrect drive. General err or messages ap[...]

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Chapter 5. Using the Setup Utility The Setup Utility pr ogram is used t o view and change the congur ation settings of your computer , regar dless of which oper ating system you are using. However , the oper ating syst em settings might override any similar settings in the Setup Utility pr ogram. Starting the L enovo BIOS Setup Utility progr am [...]

Administrator P assword Setting an Administr ator Passwor d det ers unauthoriz ed persons fr om changing conguration settings. Y ou might want to set an Administrat or P assword if you are responsible for maintaining the settings of sever al computers. After you set an Administrator P assword, a password pr ompt is displayed every time you acces[...]

T o set a P ower -On P assword, do the following: 1. Start the L enovo BIOS Setup Utility pr ogram (See ”Starting the L enovo BIOS Setup Utility pr ogram” on page 13.) 2. F rom the Security menu, select Set Power -On P assword and pr ess the Enter key . 3. The password dialog bo x will be displayed. T ype the passwor d, then pr ess the Enter ke[...]

Select A T A Device Setup , press the Enter key, then select SA T A Mode . Select Audio Setup , press the Enter key, then select Onboard Audio Controller . Select Network Setup , press the Enter key, then select Onboard Ethernet Support or LAN Boot Agent . 4. Select Disabled or Enabled and pr ess the Enter key . 5. Return t o the Lenovo BIOS Setup [...]

a. If you do not want to save the settings, select Discard changes and Exit from the menu. b. If you have changed these settings and want to return to the default settings, select Load Optimal Defaults fr om the menu. Exiting the L enovo BIOS Setup Utility progr am After you nish viewing or changing settings, press the Esc key to return to the L[...]

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Chapter 6. Symptom-t o-FRU Index The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is list ed rst. Always begin with Chapter 4, “General Checkout, ” on page 11. This inde x can also be used t o help you decide which FRUs to have available when servicing a computer . If you ar e unable to correct the pr [...]

POS T error codes Each time you turn the computer on, it performs a series of tests to check that the syst em is oper ating correctly and that certain options ar e set. This series of tests is called the Power -On Self- T est , or POS T . POST does the following: • Checks some basic motherboard oper ations • Checks that the memory is working co[...]

Chapter 7. L ocating connectors, controls and components This section provides illustrations to help locate the various connectors, controls and components of the computer . F ont view The following illustr ation shows the location of controls and components on the fr ont of the computer . Attention: Be careful not to block any air vents on the com[...]

Left and right view The following illustration shows the location of connectors, controls and components on the left and right side of the computer . 2 3 4 6 8 5 9 1 0 7 1 1. Air vents 6. Optical drive 2. USB 3.0 connector 7. B-C AS card slot (Japan models only) 3. HDMI-in connector (selected models only) 8. Memory car d r eader 4. HDMI-out connect[...]

Rear view The following illustration shows the location of connectors and components on the r ear of the computer . 1 2 3 8 7 6 4 5 1. TV tuner connector (select ed models only) 5. USB 2.0 connectors (2) 2. Headphone connector 6. P ower connector 3. Microphone connector 7. Ethernet connect or (RJ45) 4. USB 3.0 connector 8. Security cable slot Chapt[...]

Hardware components The following illustration shows the components that make up your computer . 4 5 6 7 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 8 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 2 2 1. System fan 17. Bluetooth module 2. Scalar board 18. Power switch board 3. Hard disk drive bracket 19. F ront function board 4. Har d disk drive 20. Ba[...]

Identifying parts on the motherboar d The motherboard (sometimes called the planar or syst em boar d) is the main circuit board in your comput er . It pr ovides basic computing functions and supports a variety of devices that are factory-installed or that you can install later . The following illustration shows the location of connectors and compon[...]

The following illustration shows the location of connect ors and components on the back of the motherboard. 23. TV - T uner card connector 24. Batt ery 26 IdeaCentre A720Hardwar e Maintenance Manual[...]

Identifying parts on the back of the LED panel The following illustr ation shows the components and controls on the back of LED panel. 1 2 3 4 5 6 7 8 1. Bluet ooth module 5. F ront function board 2. WLAN card 6. Converter board 3. Camer a 7. Scalar board 4. T ouch control board 8. P ower switch boar d Chapter 7 . Locating connectors, controls and [...]

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Chapter 8. Replacing hardwar e Attention: Do not remove the computer cover or att empt any repair befor e reading the “Important safety information” in the Safety and W arranty Guide that was included with your comput er . T o obtain copies of the Safety and Warr anty Guide, go to the Support W eb site at: http://consumersupport.lenovo.com. Not[...]

Replacing the k eyboard and mouse Attention: T urn off the computer and wait 3 to 5 minutes to let it cool down before r emoving the cover . T o replace the keyboard and mouse Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the oper ating system, and turn off the computer and all attached devices. Step 2. Unpl[...]

Step 2. Locat e the connect or for the power cord. Refer t o “Rear view” . Step 3. Disconnect the failing power cord and adapter fr om the comput er and connect the new power cord and adapter to the same connector . Removing the base cover Note: T urn off the comput er and wait 3 to 5 minutes to let it cool down before r emoving the cover . Not[...]

Step 5. Return the computer to an upright position, then lift the base cover up and slide it out as shown. Step 6. T o r eattach the base cover: a. Line up the base cover with the base, slide it back and snap it int o position. b. Place the computer face-down on a soft at surface, then secure the base cover to the base with the 7 screws. Replaci[...]

Step 5. Remove the 2 screws that secure the har d disk drive t o the motherboard. 1 Step 6. Disconnect the data and power cable fr om the har d disk drive. 2 1 1 2 Step 7. Slide the hard disk drive and rubber out of the bay as shown. Step 8. Detach the rubbers from the har d disk drive as shown. Step 9. Install the new hard disk drive as follows: a[...]

c. Secur e the new hard disk drive to motherboar d with the 2 screws. d. Connect the data and power cable to the new har d disk drive and motherboar d. Step 10. Reattach the base cover and secure it with the screws. Replacing a memory module Attention: T urn off the computer and wait 3 to 5 minutes to let it cool down before r emoving the cover . T[...]

Step 5. Remove the 3 scr ews that secure the system fan to the heat-sink. 1 Step 6. Disconnect the power cable from the motherboard. 2 Step 7. Lift the system fan up to r emove it. 3 1 2 3 Step 8. Line up the new system fan, then secure it to the heat-sink and connect the new power cable to the motherboar d. Step 9. Reattach the base cover and secu[...]

Step 7. Remove the heat-sink by lifting it up. Attention: Place the heat-sink upside down on a at surface to pr event thermal grease fr om contaminating other components. Attention: Use an alcohol pad t o wipe the thermal grease off the heat-sink and CPU . Step 8. Use a thermal grease syringe to place 5 drops of gr ease on the t op of the micr o[...]

Step 8. Lift the microprocessor straight up and out of the socket. 3 1 2 3 Attention: Do not touch the gold contacts on the bottom of the micropr ocessor . When handling the micropr ocessor , touch only the sides. Note: Do not drop anything ont o the microprocessor sock et while it is exposed. The socket pins must be k ept as clean as possible. Ste[...]

Step 11. L ower the microprocessor str aight down into its socket on the motherboard. Step 12. T o secur e the micropr ocessor in the socket, close the micr oprocessor r etainer and lock it into position with the small handle. Step 13. Use a thermal grease syringe to place 5 drops of grease on the top of the micr oprocessor . Each drop of gr ease s[...]

Step 6. Remove the 3 scr ews that secur e the optical drive to the motherboard and lift it up t o remove it. Step 7. Remove the 5 scr ews that secure the optical drive t o the bracket and disconnect the data cable from the optical drive. Step 8. Install the new optical drive as follows: a. Connect the data cable to the new optical drive. b. Align t[...]

Replacing the solid state disk Note: T urn off the comput er and wait 3 to 5 minutes to let it cool down before r emoving the cover . T o r eplace the solid state disk Step 1. Remove any media (disks, CDs, DVDs, or memory cards) fr om the drives, shut down the oper ating system, and turn off the computer and all attached devices. Step 2. Unplug all[...]

Step 6. Lift up the optical drive eject board t o r emove it. Step 7. T o install the new optical drive eject boar d: a. Connect the new optical drive eject board t o the motherboar d. b. Secur e the new optical drive eject boar d to the motherboard with the 2 screws. Step 8. Reattach the base cover and secure it with the scr ews. Replacing the mot[...]

Step 14. Remove the 8 scr ews that secur e the motherboar d to the chassis and slide it out as shown. Step 15. Remove the 2 screws that secure the TV - T uner car d t o the motherboard. Step 16. Disconnect the antenna cable(s) fr om the TV - T uner car d. Step 17. P ull the TV - T uner car d upwar d to remove it from the card port. 42 IdeaCentre A7[...]

Step 18. Use a at head screwdriver as a lever t o prise out the battery as shown. Step 19. T o install the new motherboar d: a. Insert the battery (CR2032) into the sock et with the side labeled “+” facing up, and pr ess the batt ery into place. b. Insert the notched end of the TV - T uner card into the card port on the new motherboard and s[...]

Step 10. Remove the 8 scr ews that secur e the motherboar d to the chassis and slide it out as shown. Step 11. Remove the 4 screws that secure the speak er system to the motherboar d. Step 12. Detach the speaker fr om the chassis. Step 13. T o install the new speak er syst em: a. Attach the new speaker cable to the chassis. b. Line up the motherboa[...]

Replacing the TV tuner card Note: T urn off the comput er and wait 3 to 5 minutes to let it cool down before r emoving the cover . T o r eplace the TV tuner card Step 1. Remove any media (disks, CDs, DVDs, or memory cards) fr om the drives, shut down the oper ating system, and turn off the computer and all attached devices. Step 2. Unplug all power[...]

Step 13. P ull the TV- T uner car d upward to r emove it fr om the card port on the motherboard. Step 14. T o install the new TV - T uner card: a. Insert the notched end of the TV - T uner card into the car d port on the motherboar d. b. Secur e new the TV - T uner car d t o the motherboard with the 2 screws. c. Connect the antenna cable(s) to the [...]

Step 10. Remove the 8 scr ews that secur e the motherboar d to the chassis and slide it out as shown. Step 11. Use a at head screwdriver as a lever t o prise out the battery as shown. Step 12. T o install the new battery: a. Insert the new batt ery (CR2032) into the socket with the side labeled “+” facing up, and pr ess the batt ery into pla[...]

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) fr om the drives, shut down the oper ating system, and turn off the computer and all attached devices. Step 2. Unplug all power cor ds from electrical outlets. Step 3. Disconnect all cables attached to the computer . This includes power cor ds, input/output (I/O) cables, and any other cab[...]

Step 8. Reattach the base cover and secure it with the scr ews. Removing the rear cover Note: T urn off the comput er and wait 3 to 5 minutes to let it cool down before r emoving the cover . T o r emove the rear cover Step 1. Remove any media (disks, CDs, DVDs, or memory cards) fr om the drives, shut down the oper ating system, and turn off the com[...]

Step 7. Put the head of a at head screwdriver between the middle frame and the rear cover as shown. Then using the scr ewdriver as a lever and the middle fr ame metal bar as the fulcrum, prise the r ear cover away from the middle fr ame. 1 F u l c ru m L e ve r 1 Step 8. Working ar ound the edge in an anti-clockwise direction, use your ngers [...]

Step 8. Remove the scalar shielding and set it aside. Step 9. Disconnect all the cables fr om the scalar boar d. Step 10. Remove the 5 screws that secure the scalar boar d to the middle fr ame and lift it up to remove it. W L AN C a m e ra C o nve rte r T o u c h c o n trol S c a l a r HDM I/DV I L E D/C I R L VDS M MB P o we r Bl u e too th Step 1[...]

a. Line up the holes on the new scalar board with the mounting holes on the middle fr ame and secure it with the 5 scr ews. b. Connect all the cables to the new scalar board. c. Reattach the scalar shielding to the middle frame with the 3 scr ews. Step 12. Reattach the r ear cover to the LED panel. Step 13. Reattach the hinge to the chassis, and r [...]

a. Line up the holes on the new touch control board with the mounting holes on the middle fr ame and secure it with the 2 screws. b. Connect all the cables t o the new t ouch control board. Step 11. Reattach the r ear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and r econnect the touch and LED panel cables to the motherboard[...]

Step 10. T o install the new convert er boar d: a. Line up the holes on the new converter board with the mounting holes on the middle frame and secure it with the 4 screws. b. Connect the 2 cables to the new converter boar d. Step 11. Reattach the r ear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and r econnect the touch and[...]

Step 8. Remove the screw that secures the power switch board t o the LED panel and lift up the power switch board to remove it. Step 9. T o install the power switch board: a. Line up the hole on the new power switch board with the mounting hole on the LED panel and secure it with the scr ew. b. Connect the power cable t o the new converter board. S[...]

Step 6. Remove the rear cover . Refer to “Removing the r ear cover” . Step 7. Use a small at head screwdriver to prise the Bluet ooth module away from the socket. 1 2 Step 8. Disconnect the cable from the Bluet ooth module. 3 1 2 3 Step 9. T o install the new Bluet ooth module: a. Connect the cable to the new Bluetooth module. b. Line up the[...]

Step 9. Lift up the WLAN card t o remove it from the socket. 1 1 1 1 2 4 3 Step 10. T o install the new WLAN card: a. Connect the data cable to the new WLAN card. b. Line up the new WLAN car d with the socket, snap it into position and secure it with the pins. c. Connect the antenna cable t o the new WLAN card. Step 11. Reattach the r ear cover to [...]

Step 8. Lift up the camer a 2 and disconnect the data cable from the camera. 3 1 2 3 1 Step 9. T o install the new camer a: a. Connect the data cable t o the new camer a. b. Line up the holes in the new camer a with the mounting holes on the front bezel and secure it with the 2 scr ews. Step 10. Reattach the r ear cover to the LED panel. Step 11. R[...]

Step 9. Lift up the fr ont function boar d to remove it from the fr ont bez el. 3 3 1 2 1 Step 10. T o install the new front function boar d: a. Connect the data cable t o the new front function board. b. Line up the holes in the new front function boar d with the mounting holes on the fr ont bez el and secure it with the 2 screws. Step 11. Reattac[...]

Step 7. Remove the scalar board. Refer to “Replacing the scalar boar d” . Step 8. Remove the touch control board. Refer to “Replacing the touch contr ol boar d” . Step 9. Remove the converter boar d. Refer t o “Replacing the converter board ” . Step 10. Remove the power switch boar d. Refer to “Replacing the power switch board” . St[...]

Step 17. Remove the 6 scr ews that secure the hinge to the middle frame and set the hinge aside. Step 18. T o install the new the LED panel: a. Line up the holes on the hinge with the mounting holes on the new middle fr ame and secur e it with 6 screws. b. Attach all the cables t o the new LED panel middle fr ame and front bezel. c. Attach the WLAN[...]

4 5 6 7 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 8 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 2 2 Item # FRUs Service Part Number (FRU #) CRU ID Motherboard A720 1G_DDR3 W/HDIN W/TV1 MB 90000165 N A720 2G_DDR3 W/HDIN W/TV1 MB 90000166 N A720 1G_DDR3 W/HDIN W/O TV MB 90000167 N A720 2G_DDR3 W/HDIN W/O TV MB 90000168 N A720 1G_DDR3 W/O HDIN W/O TV1[...]

Audio N Realtek ALC272- V A4 73040715 N Memory M471B5773DH0-CK0 1-100226 N HMT325S6CFR8C-PB 1-100227 N MT8KTF25664HZ-1G6M1 1-100228 N Elp_R J2108BDBG-GN-F 2GB D3-1600S MEMORY 1-100425 N M471B5273DH0-CK0 1-100230 N HMT351S6CFR8C-PB 1-100231 N Elp_R J2108BDBG-GN-F 4GB D3-1600S MEMORY 1-100426 N MT16KTF51264HZ-1G6M1 1-100232 N Hard disk drive Seagate [...]

P ower Supply FSP150-RAB 150W adapt er® 36-001876 1 Lieton P A-1151-11V A 150w adapter(R) 36-001875 1 Heat-sink A720 CoolMaster DIS 45W Heat Sink 90200583 N 31 A720 A VC DIS 45W Heat Sink 90201255 N System fan A720 Delta DIS 45W F an 90200584 N 1 A720 A VC DIS 45W F an 90201256 N WLAN card A720 Wlan C ard W/CABLE 90000171 N 16 A720 Wlan Anntena 90[...]

T ouch control boar d Mastouch 27" PCT t ouch panel win8 73041906 N AUO M270HW02 V3 Ultr a-slim MV A-LED 18200174 N A720 Mastouch T ouch Module 90400015 N A720 3M L CD T ouch Module 90400016 N A720 LCD F ront Bezel 90200748 N A720 Mastouch MainF rame Stand 90200749 N A720 3M MainF r ame Stand 90200750 N 29 A720 TOUCH Cable 90200733 N Keyboard [...]

Liteon SK-8861(LA-AR)S-SilkKB-Silver （ WW ） 90200569 2 Mouse Liteon SM-8861(WW) Mouse Silver （ WW ） 90200570 2 Liteon SM-8861 Mouse(MY) Silver （ WW ） 90200571 2 LiteonSM-8861Mouse(No Batt ery)Silver （ WW ） 90200572 2 Liteon SM-8861(JP) Mouse-Silver(WW) 90200781 2 P ower cords V olex 1.0m C5 US P ower Cable 31033858 1 longwell Black [...]

Longwell Black Single-end 1.0m SA C5P ower C able® 31039105 1 V olex 1.0m C5 SA P ower Cable 31049501 1 Mechanical A720 Base Cover W/BCAS W/TV2 W/HDMI 90200744 N A720 Base Cover W/O BC AS W/O TV2 W/HDMI 90200745 N A720 Base Cover W/O BCAS W/O TV2 W/O HDMI 90200746 N 7 A720 Base Cover W/O BC AS W/O TV W/HDMI 90200747 N 18 A720 Power Board 90000214 [...]

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Chapter 9. Gener al information This chapter provides general information that applies t o all comput er models cover ed by this manual. Additional Service Information This chapter pr ovides additional information that the service repr esentative might nd helpful. P ower management P ower management reduces the power consumption of certain compo[...]