Compaq 400CX 486 DX2/40 MHZ 250 MB 4 MB 8.4 Bedienungsanleitung

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Notice The information in this guide is subject to change without notice. Compaq Computer Corporation shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This guide contains information protected by copyr[...]

Preface This Maintenance and Service Guide is used for reference when servicing the Compaq Contura 400 Family of Personal Computers. Compaq Computer Corporation reserves the right to make changes to the Compaq Contura 400 Family of Personal Computers without notice. Symbols The following words and symbols mark special messages throughout this guide[...]

o Compaq Service Quick Reference Guide o Service Training Guides o Compaq Service Advisories and Bulletins o Compaq QuickFind[...]

Chapter 1. Illustrated Parts Catalog Intr odu ct ion Chapter 1.1 Illustrated Parts Breakdown The computer combines a display assembly and system unit module. The display and system unit module are joined together by clutches on either side secured by screws in the chassis and display enclosure allowing it to open and close. The system unit module i[...]

Chapter 1.2 Serial Number The computer serial numbers should be provided to Compaq whenever requesting information or ordering spare parts. The serial number is located on the bottom of the computer. The serial number on the Docking Base is located on the rear of the base. Chapter 1.3 System Unit Module Overview The system unit module (Figure 1-4) [...]

o Battery pack and compartment components o Keyboard assembly o Integrated trackball assembly o Diskette drive o System board o PC Card (PCMCIA) ejector rails and components The hard drive, memory expansion board, and battery pack are accessed from the bottom of the computer. To service the remaining system unit module components, the keyboard asse[...]

=========================================================================== Models 400 and 410 This section provides a description of the system unit module components for Models 400 and 410. These components are accessed from the bottom of the computer: o Hard drive -- The hard drive is easily replaced or upgraded from the bottom of the computer. [...]

PC Card ejection levers are replaceable, but are not interchangeable with those used in the Models 420 and 430. o Diskette drive -- The diskette drive attaches to the system board by a bracket and three screws. It is connected by a diskette drive cable and LIF connector. The bracket attaches to the drive with four screws. The drive is protected by [...]

o Battery pack -- The Nickel Metal Hydride battery pack is accessed through the battery compartment. To access the remaining system unit components, open the computer and remove the keyboard assembly. These components include the following: o Integrated trackball assembly -- This optical trackball is centrally located at the bottom of the keyboard [...]

Chapter 1.4 Display Assembly Overview Display Assembly Description This section provides a description of the display assembly and components. All display assemblies (Figure 1-5 and Figure 1-6) include the following replaceable parts: o Bezel o Enclosure latches o Inverter board o Liquid crystal display (LCD) panel o Shield o Enclosure o Display ca[...]

To replace the display assembly, the assembly must be removed from the system unit module. This is done by removing the keyboard assembly, disconnecting the display cable and display ground cable from the system unit module, removing the tilt feet and handle brackets, removing the rear clutch screws, and lifting off the display assembly. To service[...]

Chapter 1.5 Docking Base The docking base includes the following replaceable parts: o Battery door o Feet o Handle[...]

Chapter 1.6 Monitor Support Cover The monitor support cover is used with the docking base. The foot on the monitor support cover is the only replaceable part.[...]

Cha p ter 1.7 S y stem Unit Module Parts[...]

Table 1-2. System Unit Module -- Models 400 and 410 =========================================================================== Spare Part Description Number Notes =========================================================================== 1. Base enclosure 147856-001 Includes: a. PC Card eject levers, pin, door, and spring b. battery latch button [...]

5. Processor upgrade 486 DX2/50 MHz 169644-001 --------------------------------------------------------------------------- 6. Real-time clock battery 117099-001 --------------------------------------------------------------------------- 7. Mechanical Trackball 147876-001 --------------------------------------------------------------------------- 8.[...]

Table 1-3. System Unit Module -- Models 420 and 430 =========================================================================== Spare Part Description Number Notes =========================================================================== 1. Base enclosure 189239-001 Includes: a. PC Card eject levers, pin, door, and spring b. battery latch button [...]

--------------------------------------------------------------------------- 3. Diskette drive bracket 189240-001 --------------------------------------------------------------------------- 4. Diskette drive 147963-001 --------------------------------------------------------------------------- 5. Real-time clock battery 117099-001 ------------------[...]

Table 1-4. Monochrome Display Assembly -- Models 400 and 410 =========================================================================== Description Spare Part Number Notes =========================================================================== 1. Display bezel 147882-001 2. Backlight inverter board 147622-001 3. Display panel 147877-001 Includ[...]

Chapter 1.9 Color STN (9.5 inch) Display Assembly Part s Table 1-5. CSTN (9.5 inch) Display Assembly -- Models 400 and 410 =========================================================================== Description Spare Part Number Notes =========================================================================== 1. Display bezel 147883-001 2. Backligh[...]

=========================================================================== Chapter 1.10 Color STN (10.4 inch) D isplay Assembly Parts Table 1-6. CSTN (10.4 inch) Display Assembly -- Models 420 and 430 =========================================================================== Spare Part Description Number Notes ====================================[...]

6. Display enclosure Includes enclosure, latch, kit 189245-001 spring, logo and pad for Sharp CSTN 7. Screw kit * 147885-001 --------------------------------------------------------------------------- * Not Shown =========================================================================== Chapter 1.11 Color TFT (8.4 inch) Display Assembly Parts Tabl[...]

a. display cable b. display ground cable 5. Display clutch Includes screws for handle (left and right) 147858-001 bracket, washer, tilt feet 6. Display enclosure Includes enclosure, latch, kit 147881-001 spring, and logo 7. Screw kit * 147885-001 --------------------------------------------------------------------------- * Not Shown ===============[...]

board 189136-001 3. Display panel 189114-001 Includes labels and shield 4. Display cables 189247-001 Includes: a. display cable b. display ground cable 5. Display clutch Includes screws for handle (left and right) 147858-001 bracket, washer, tilt feet 6. Display enclosure Includes enclosure, latch, kit 189243-001 spring, and logo. 7. Screw kit * 14[...]

=========================================================================== 1. CPU Cover Includes: 147860-001 a. PC Card door b. spring * c. indicator panel d. light deflector 2. U.S. 147875-001 3. U.K. 147875-003 * 4. German 147875-004 * 5. French 147875-005 * 6. Italian 147875-006 * 7. Spanish 147875-007 * 8. Danish 147875-008 * 9. Norwegian 1478[...]

Table 1-10. Contura Enhanced Keyboards =========================================================================== Description Spare Part Number =========================================================================== 1. Enhanced II Keyboard - Domestic 140536-101 2. Enhanced III Keyboard - U.K. 140536-103 3. Enhanced III Keyboard - German 140536[...]

12. Enhanced III Keyboard - Portuguese 140536-113 * 13. Enhanced III Keyboard - Turkish 140536-114 * 14. Enhanced III Keyboard - Greek 140536-115 * 15. Enhanced III Keyboard - Latin American 140536-116 * 16. Enhanced III Keyboard - Arabic 140536-117 * 17. Enhanced III Keyboard - Belgian 140536-118 * 18. Enhanced III Keyboard - Japanese 140536-119 *[...]

Table 1-11. Cables for Models 400 and 410 =========================================================================== Description Spare Part Number =========================================================================== 1. Display cables 147884-001 a. CSTN (9.5 in) Models 400 and 410 b. MSTN (9.5 in) (Model 400 only) c. CTFT (8.4 in) Models 400[...]

Table 1-12. Cables for Models 420 and 430 =========================================================================== Description Spare Part Number =========================================================================== 1. Display cables 189247-001 a. CTFT (10.4 in) Models 420 and 430 b. CSTN (10.4 in) Models 420 and 430 c. XOVER board for CSTN[...]

Table 1-13. Contura AC Adapter and Power Cord =========================================================================== Description (All Models) Spare Part Numbers =========================================================================== 1. AC adapter with wallprongs 147679-001 2. AC adapter 147679-002 3. Power cord (U.S./Canada) 197230-001 4. [...]

Table 1-14. Contura Memory and Processor =========================================================================== Description (All Models) Spare Part Numbers =========================================================================== 1. Memory expansion board a. 4 MB 147654-001 b. 8 MB 147656-001 c. 16 MB 147658-001 d. 24 MB * 189261-001 2. Proc[...]

Table 1-15. Miscellaneous Carrying Devices =========================================================================== Description (All Models) Spare Part Numbers =========================================================================== 1. Briefcase, Ramie 129930-001 2. Slipcase 194162-001 3. Briefcase, SS (soft-sided) 121423-001 * --------------[...]

Table 1-16. Docking Base and Monitor Support Cover =========================================================================== Description (All Models) Spare Part Numbers =========================================================================== 1. Docking Base - Ethernet 147675-001 2. Docking Base - pass-thru 147699-001 3. Docking base miscellane[...]

=========================================================================== Description Spare Part Number Spare Part Number Models 400 & 410 Models 420 & 430 =========================================================================== Handle 147678-001 * 147678-001 * ---------------------------------------------------------------------------[...]

Chapter 1.21 Fastener List Table 1-18. Fastener Kit for All Models =========================================================================== Description: Spare Part Number --------------------------------------------------------------------------- Screws and Fastners Kit (Quantity = 25 each) 147885-001 ============================================[...]

M3.0 x 8.0 Pan Display to display 121187-007 SL/T8 4 ** enclosure --------------------------------------------------------------------------- M2.5 x 24.0 Truss CPU cover to CPU 144865-006 SL/T8 7 base --------------------------------------------------------------------------- M2.6 x 2.0 Fillister Diskette drive 121188-001 T8 4 to FDD bracket ------[...]

German 147990-041 French 147990-051 Italian 147990-061 Spanish 147990-071 Netherlands 147990-331 Swedish 147990-101 --------------------------------------------------------------------------- Manuals - English 147989-001 QUICK SETUP BEYOND SETUP --------------------------------------------------------------------------- Manuals - German 147989-041 [...]

Danish 195973-081 Norwegian 195973-091 Swedish 195973-101 Portuguese 195973-131 Dutch 195973-331 Finnish 195973-351 --------------------------------------------------------------------------- Manual - LOTUS ORGANIZER English 137885-001 German 137885-041 French 137885-051 Italian 137885-061 Spanish 137885-071 Danish 137885-081 Norwegian 137885-091 S[...]

Chapter 2. Pr eparing the Computer for Service Intr odu ct ion This chapter provides general service information necessary to prepare the computer for service in the following areas: o Electrostatic discharge o Service preliminaries o Battery disposal Adherence to the procedures and precautions described in this chapter is essential for proper serv[...]

Motions of bench worker 6,000 V 800 V 400 V Removing DIPS from plastic tubes 2,000 V 700 V 400 V Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V -----------------------------[...]

Grounding Methods The method for grounding must include a wrist strap or a foot strap at a grounded workstation. When seated, wear a wrist strap connected to a grounded system. When standing, use footstraps and a grounded floor mat. Table 2-2. Static-Shielding Protection Levels =======================================================================[...]

dissipative floor mats, use straps on both feet with a minimum of 1 megohm of resistance between operator and ground. To be effective, the conductive strips must be worn in contact with the skin. Field service tools, such as cutters, screwdrivers, vacuums, that are conductive. Portable field service kit with a static dissipative vinyl pouch that fo[...]

o Tool requirements o Screws o Cable and connectors o Plastics Tool Requirements o Flat-bladed screwdriver o Torx T8 screwdriver (included in 130619-001) o Hex socket driver (3/16) o 25-Pin printer loopback plug (included in 100767-001) o 9-Pin serial loopback plug (included in 100767-001) o Trackball removal tool (spare part number 147779-001) o C[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Keyboard >>>>>>>>>>[...]

state, province, or local regulations. Whenever possible, recycle the battery components. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<[...]

Chapter 3. Removal and Replacement Procedures Intr odu ct ion This chapter provides complete removal and replacement procedures for the Compaq Contura 400 Family of Personal Computers. Procedures that apply to specific models are indicated in parenthesis. After completing removal and replacement procedures, run the diagnostics program to verify tha[...]

|-- 3.16 PC Card (PCMCIA) ASSEMBLY | |-- 3.17 PC Card (PCMCIA) EJECTION LEVERS AND PIN | |-- 3.18 PC Card (PCMCIA) DOORS AND SPRINGS | |-- 3.19 SYSTEM CHASSIS | |-- Trough | |-- 3.20 CPU BASE | |-- Battery shield clip | |-- Lock provision plate | |-- Anti-skid pads | |-- 3.21 DISPLAY ASSEMBLY COMPONENTS (Models 400 and 410) | |-- Bezel | |-- Latche[...]

| |-- Handle | |-- 3.31 MONITOR SUPPORT COVER Chapter 3.2 Preparing the Computer >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<[...]

5. Disconnect the AC Adapter power cord from the computer (Figure 3-2). 6. Eject the diskette (Figure 3-2) and PC Card, if installed.[...]

7. Open the battery compartment by lifting up the front of the computer [1] and sliding the battery compartment release button to the right [2]. The battery compartment opens slightly. Lower the compartment [3] (Figure 3-3).[...]

8. Remove the battery pack (Figure 3-4).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Metal objects can damage the battery pack and the connectors inside the comp[...]

2. Close the computer and turn it top-side down. 3. Move the tilt foot toward the front of the computer, exposing the handle bracket screw on either side of the computer (Figure 3-5). 4. Using a Torx T8 , remove the screw and washer from each handle bracket. These screws are not reusable and must be discarded. 5. Remove the handle bracket (Figure 3[...]

6. To install the handle bracket, reverse the previous steps. Discard the old screws and replace with new screws. Chapter 3.4 Tilt Feet This procedure is necessary if replacing the tilt feet or if separating the display assembly from the system unit module. Removing the Tilt Feet To remove the tilt feet, follow these steps: 1. Disconnect all power [...]

4. To install the tilt foot, reverse the previous steps. Discard the old screws and replace with new screws. Chapter 3.5 Hard Drive This section contains removal procedures for the following hard drive components: o Hard drive compartment cover o Hard drive o Hard drive bracket Removing the Hard Drive Compartment Cover To remove the hard drive comp[...]

2. Close the computer and turn it top-side down. 3. Using a Torx T-8 or flat-bladed screwdriver, remove the two screws from the hard drive compartment cover (Figure 3-8). NOTE: These two screws also secure the CPU base to the keyboard and must be removed in order to remove the keyboard and access system components. 4. Use a Case utility tool to rem[...]

5. To replace the hard drive compartment cover, reverse the previous steps making sure to insert the bracket's tab under the plastic edge. Removing the Hard Drive 1. Remove the hard drive compartment cover. Refer to "Removing the Hard Drive Compartment Cover" in this section. 2. Remove the hard drive by grasping the hard drive bracke[...]

4. To replace the hard drive, reverse the previous steps. Removing the Hard Drive Bracket 1. Remove the hard drive compartment cover. Refer to "Removing the Hard Drive Compartment Cover" in this section. 2. Remove the hard drive and bracket. Refer to "Removing the Hard Drive" in this section. 3. Using a Torx T8 , remove the four[...]

4. To replace the hard drive bracket, reverse the previous steps. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To prevent[...]

Chapter 3.6 Memory Expansion Board This section contains removal and replacement procedures for the memory compartment cover and the memory expansion board. The memory compartment cover and the bottom of the CPU base are embossed with arrows and two icons that indicate whether the memory compartment cover is unlocked [1] or locked [2].[...]

Removing and Replacing the Memory Compartment Cover To remove the memory compartment cover, follow these steps: 1. Disconnect all power from the computer and remove the battery pack, diskette, and PC Card, if installed (Section 3.2). 2. Close the computer and turn it top-side down. 3. Slide the memory compartment cover toward the rear of the comput[...]

4. To replace the memory compartment cover, reverse the previous steps. Removing the Memory Expansion Board To remove the memory expansion board, follow these steps: 1. Remove the memory compartment cover. Refer to "Removing and Replacing the Memory Compartment Cover" in this section. 2. Gently rock the memory expansion board back and for[...]

Replacing the Memory Expansion Board To replace the memory expansion board, follow these steps: 1. Align the two connectors on the memory expansion board with the corresponding connectors on the system board. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION [...]

3. Replace the memory compartment cover. Refer to " Removing and Replacing the Memory Compartment Cover" in this section. Chapter 3.7 Keyboard Assembly This section contains removal and replacement procedures for the following the keyboard assembly components: o CPU cover o Keyboard o Top PC Card door and spring NOTE: The bottom PC Card d[...]

battery pack (Section 3.2). 2. Close the computer and turn it top-side down. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<[...]

4. Use a case utility tool to remove the hard drive compartment cover (Figure 3-18). 5. Carefully, turn the computer top-side up and open the display to its fully opened position (135-degree angle) (Figure 3-19).[...]

6. Using the case utility tool, lift up the outside rear corners of the keyboard assembly to release the keyboard snaps [1], and tilt the keyboard assembly toward you to release the keyboard connector [2] (Figure 3-20). IMPORTANT: When using the case utility tool, use care to keep it out of the diskette drive area.[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The computer becomes top heavy when the keyboard assembly is removed and the[...]

8. Position the display to a 90-degree angle (Figure 3-22).[...]

Removing the CPU Cover To remove the CPU cover for replacement, follow these steps. 1. Remove the keyboard assembly from the computer. Refer to "Removing the Keyboard Assembly" in this section. 2. Turn the keyboard assembly top-side down. >>>>>>>>>>>>>>>>>>>>>>>>>&[...]

4. Separate the CPU cover from the keyboard (Figure 3-23). 5. To replace the CPU cover, reverse the previous steps. Removing the Top PC Card (PCMCIA) Door and Spring To remove the top PC Card door and spring from the keyboard assembly, follow these steps: 1. Remove the keyboard assembly from the computer. Refer to "Removing the Keyboard Assemb[...]

Replacing the Top PC Card (PCMCIA) Door and Spring To replace the top PC Card Door and Spring to the keyboard assembly, follow these steps: 1. Install the PC Card spring on the door post, ensuring that the bent arm of the spring is placed against the rib on the PC Card door (Figure 3-25).[...]

2. Install the PC Card (PCMCIA) door, ensuring that the spring is placed between the post [1] and the rib [2] (Figure 3-26).[...]

Replacing the Keyboard Assembly If installing a new keyboard assembly, the hook and loop fastener will have to be attached to the diskette drive bracket: To attach the hook and loop fastener to the diskette drive bracket, follow these steps: 1. Separate the new hook and loop fastener. 2. Attach the opposite color of the hook and loop fastener to th[...]

To replace the existing keyboard assembly in the computer, follow these steps: 1. Open the display to its fully opened position of 135-degrees (Figure 3-28).[...]

2. Angle the front end of the keyboard assembly into place at the front edge of the system unit module. 3. Ensure that the front plastic seams of the keyboard assembly and the front of the system unit module are aligned and flush with each other. 4. Carefully lower the rear of the keyboard assembly to the system unit module and press the outside re[...]

Chapter 3.8 Battery Co mpartment Components This section contains removal procedures for the following battery compartment components: o Battery compartment o Anti-skid pad o Battery release button spring o Battery release button Removing the Battery Compartment To remove the battery compartment components, follow these steps: 1. Disconnect all pow[...]

forth, then lifting it up from the bottom of the base (Figure 3-30). 4. To replace the battery compartment, reverse the previous steps. Attaching the Anti-Skid Pads If installing a new battery compartment, two anti-skid pads must be attached to the bottom of the battery compartment. To attach the anti-skid pads, follow these steps: 1. Peel off the [...]

Removing the Battery Release Spring and Button To remove the battery release spring and button, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> C[...]

4. Rotate the battery release button counterclockwise, until it bows slightly, and lift it up to clear the hook on the computer base (Figure 3-33).[...]

5. To replace the battery release button and spring, reverse the previous steps. Chapter 3.9 Real-Time Clock Batte ry (Models 400 and 410) To remove the real-time clock battery, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). >>>>>>>>>>>>>[...]

non conductive probe into the battery holder and pushing back on the battery to release it (Figure 3-34). NOTE: Refer to Chapter 2 "Preparing the Computer for Service" for battery disposal procedures. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTIO[...]

The computer becomes top heavy when the keyboard assembly is removed and the display is opened. To prevent damage to the display and the computer, ensure that the display assembly is opened to a 90-degree angle. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g[...]

Chapter 3.11 Processor Upgrade Option (Model 400 Only) This section provides installation and replacement procedures for the processor upgrade. The Compaq Contura 400 is the only model with the DX2/40 MHz Processor that can be upgraded to a DX2/50 MHz processor. Once the processor is installed, the upgraded processor overrides control of the proces[...]

4. To remove the processor upgrade, reverse the previous steps. Chapter 3.12 Integrated Mechanical Trackball Assembly (Models 400 and 410) IMPORTANT: The mechanical trackball assembly is not interchangeable with the optical trackball assembly in Models 420 and 430. To remove the integrated mechanical trackball assembly, follow these steps: 1. Disco[...]

2. Remove the keyboard assembly (Section 3.7). 3. Using a Torx T-8 or flat-bladed screwdriver, remove the screw from the front right-hand corner of the integrated mechanical trackball assembly (Figure 3-37). 4. Disconnect the integrated mechanical trackball assembly from the system board by pulling forward on the integrated mechanical trackball ass[...]

6. To replace the integrated mechanical trackball assembly, reverse the previous steps. Trackball Cleaning Procedures 1. Turn off the computer by pressing the left Ctrl+Alt keys and the power button. Disconnect the AC power and remove the battery pack. 2. Loosen the trackball retaining ring by placing the trackball tool over the retaining ring and [...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 5. Clean the trackball with isopropyl (rubbing) a[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 2. Remove the keyboard assembly (Section 3.7). 3.[...]

5. To replace the integrated mechanical trackball assembly, reverse the previous steps. Trackball Cleaning Procedures 1. Turn off the computer, disconnect AC power, and remove the battery pack. 2. Remove the Integrated trackball. 3. Remove any large particles of debris that have fallen into the trackball housing. 4. Dip a cotton swab in isopropyl a[...]

7. Replace the battery pack and reconnect the AC power. Chapter 3.14 Diskette Drive (All Models) This section contains removal and replacement procedures for the following diskette drive components: o Diskette Drive o Diskette Drive Bracket o Diskette Drive Insulator Strip Removing the Diskette Drive To remove the diskette drive, follow these steps[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Screws in the computer are not interchangeable. As you remove screws, place [...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When removing or replacing the diskette drive, hold it by grasping the verti[...]

Removing the Diskette Drive from the Diskette Drive Bracket 1. Remove the diskette drive from the system chassis. Refer to "Removing the Diskette Drive" in this section. 2. Remove the diskette drive from the bracket by removing the four screws from both sides of the bracket (Figure 3-44).[...]

3. Separate the diskette drive from the bracket (Figure 3-45).[...]

4. To replace the diskette drive into the bracket, reverse the previous steps. Applying the Diskette Drive Hook and Loop Fastener If installing a new diskette drive bracket, the hook and loop fastener must be attached to the bracket. To attach the hook and loop fastener, follow these steps: 1. Separate the new hook and loop fastener. 2. Remove the [...]

Replacing the Diskette Drive To replace the diskette drive into the system chassis, follow these steps: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<&[...]

4. Reconnect the Diskette Drive Cable and reinstall the three screws. Chapter 3.15 The System Board (All Models) To remove the system board, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Remove the hard drive (Section 3.5). 3. Remove the memory expansion board, if installe[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The computer becomes top heavy when the keyboard assembly is removed and the[...]

10. Disconnect the display cable from the system board by pulling up both ends of the ZIF connector slide simultaneously [1], carefully opening the slide [2] (Figure 3-49). 11. Lift the display cable out of the connector slide [3], being careful not to pull or twist the cable (Figure 3-49). 12. Disconnect the display ground cable [1] from the LIF c[...]

13. Remove the three keyboard ground clips from the system board (Figure 3-51).[...]

14. Remove the left clutch ground clip from the system chassis (Figure 3-52).[...]

15. For Models 400 and 410, using a Torx T8 or slotted driver, remove the five screws from the system board and the two screws from the battery contact (Figure 3-53).[...]

16. For Models 420 and 430, using a Torx T8 or slotted driver, remove the four screws from the system board and the two screws from the battery contact (Figure 3-54).[...]

17. From the front of the computer, tilt the system board up then lift the system board out of the system chassis (Figure 3-55).[...]

18. Remove the LIF clip from above the serial port connector between the system board and the system chassis (Figure 3-56).[...]

19. To replace the system board, reverse the previous steps. To replace the System Board, follow these steps: IMPORTANT: When installing a new system board, make sure that the insulator is placed between the system board and the diskette drive. The gasket over the Keyboard connector must be tucked under the Chassis. IMPORTANT: When replacing the sy[...]

2. Install screws [1] and [2] on the system board before replacing the remaining system board and battery contact screws for Models 400 and 410 (Figure 3-58) and for Models 420 and 430 (Figure 3-59).[...]

[...]

NOTE: If installing a new system board, ensure that the insulator is installed between the system board and diskette drive. The gasket over the keyboard connector must be tucked under the Chassis. Chapter 3.16 PC Card (PCMCIA) A ssembly The PC Card assembly consists of the PC Card clip and PC Card rails. To remove the PC Card assembly or to remove [...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 2. Remove the keyboard assembly (Section 3.7). 3.[...]

rails are assembled properly into the PC Card Header. The rail goes under the edge of the header. Tighten the header screws from the bottom of the system board. Removing the PC Card (PCMCIA) Rails NOTE: The rails for the 400 and 410 models are not interchangeable with the rails for the 420 and 430 models. To remove the PC Card rails, follow these s[...]

This section contains removal and replacement procedures for the PC Card ejection levers and pin. To remove the PC Card ejection levers and pin, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Remove the PC Card ejection lever pin from the system chassis (Figure 3-62). 3. Re[...]

4. Remove the bottom PC Card ejection lever from the boss on the CPU base (Figure 3-64)[...]

5. To replace the PC Card ejection levers and pin, reverse the previous steps. Chapter 3.18 PC Card (PCMCIA) D oors and Springs This section contains removal and replacement procedures for the PC Card doors and springs. The top PC Card door and spring are located on the keyboard assembly and the bottom PC Card door and spring are located on the CPU[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 2. Remove the keyboard assembly (Section 3.7). 3.[...]

2. Install the PC Card door, making sure the spring is placed between the notch [1] and the rib [2] (Figure 3-67).[...]

Bottom PC Card (PCMCIA) Door and Spring The bottom PC Card door and spring are located on the CPU base. To remove the bottom PC Card door and spring, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). >>>>>>>>>>>>>>>>>>>>[...]

To replace the bottom PC Card (PCMCIA) spring and door, follow these steps: 1. Install the PC Card spring on the door post, making sure the bent arm of the spring is placed against the rib on the PC Card door (Figure 3-69).[...]

2. Install the PC Card door, making sure the spring is placed between the notch [1] and the rib [2] (Figure 3-70).[...]

Chapter 3.19 System Chassis (All Models) To remove the system chassis, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Remove the handle bracket on either side of the computer (Section 3.3). 3. Remove the tilt feet on either side of the computer (Section 3.4). >>>&g[...]

7. Remove the four clutch screws from the rear of the system unit module (Figure 3-71). 8. Remove the display assembly from the system unit module (Figure 3-72).[...]

9. Slide the trough at the rear of the CPU base to the right, then lift up to remove (Figure 3-73).[...]

10. Remove the system chassis by gently separating it from the CPU base and lifting out the system chassis (Figure 3-74).[...]

11. To replace the system chassis, reverse the previous steps. Chapter 3.20 CPU Base (All Models) This section provides removal and replacement procedures for the following CPU base components: o Battery shield clip o Lock provision plate o Anti-skid pads Removing and Replacing the Battery Shield Clip To remove the battery shield clip, follow these[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The computer becomes top heavy when the keyboard assembly is removed and the[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The computer becomes top heavy when the keyboard assembly is removed and the[...]

1. Peel off the top layer of one of the anti-skid pads to expose the adhesive. 2. With the adhesive-side down, place the anti-skid pad into the raised oval outline on the CPU base and the battery tray (Figure 3-77). Chapter 3.21 Display Assembly Components (Models 400 and 410) This section contains removal and replacement procedures for the followi[...]

serious injury or damage to the equipment. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To rem[...]

5. To replace the bezel, reverse the previous steps. Removing the Display Enclosure Latches and Springs To remove the display enclosure latches and springs from either side of the display enclosure, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. 3. Remove[...]

6. Remove the display latch spring from the latch (Figure 3-81).[...]

Replacing the Display Enclosure Springs and Latches To replace the display springs and latches, follow these steps: 1. Hook the display latch spring on to the display latch [1] and place the display latch spring over the post in the display enclosure [2] (Figure 3-82).[...]

2. Slide the display latch into place on either side of the display enclosure (Figure 3-83).[...]

Removing the Display Inverter Board To remove the inverter board, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. 3. Remove the display bezel. Refer to "Removing and Replacing the Display Bezel" in this section. >>>>>>>>&g[...]

placement can cause severe damage to the unit. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 4.[...]

Replacing the Display Inverter Board To replace the inverter board, follow these steps: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<&[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 1. Insert the inverter board LIF connector into t[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 4. Remove the display cable from the system board[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To prevent damage to the trough, ensure that the trough does not tilt forwar[...]

135-degree angle. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 10. Open the display to its ful[...]

12. Carefully remove the Monochrome LCD panel, display cable, and shield from the display enclosure (Figure 3-90).[...]

13. Lay the Monochrome LCD panel face down on a clean surface. 14. Grasp the sides of the shield near the backlight cable. Flex the shield away from the Monochrome LCD panel. Ensure that the shield tabs and finger grips clear the LCD panel (Figure 3-91).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When servicing the computer, ensure that cables are placed in their proper l[...]

17. Lift the display ground cable out of the display enclosure (Figure 3-93).[...]

Replacing the Display Ground Cable, the Display Cable, the Shield, and the Monochrome Panel To replace the display ground cable, the display cable, the shield, and the Monochrome LCD panel, follow these steps: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION[...]

2. Replace the display cable on the monochrome LCD panel by carefully inserting the end of the display cable into the ZIF connector slide on the LCD panel (Figure 3-95). IMPORTANT: Ensure that the ZIF connector slide is in its fully upward position and that it remains so while you are inserting the cable into it. Before closing the slide, ensure th[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Excess flexing and bending of the shield tabs and fingers can damage the shi[...]

5. Place the shield tabs in the indentations on the right side of the Monochrome LCD panel (Figure 3-97).[...]

6. Align the Monochrome LCD panel, shield, and cable in the display enclosure and replace the screws. Ensure that the ZIF connector end of the display cable and the end of the display ground cable are exposed at the bottom of the display enclosure (Figure 3-98).[...]

7. Connect the display cable and the backlight cable to the inverter board (Section 3.21). 8. Replace the inverter board (Section 3.21). 9. Replace the bezel (Section 3.21). 10. Connect the display ground cable [1] to the LIF clip above the serial port connector (Figure 3-99). 11. Carefully insert the end of the display ground cable into the ZIF co[...]

12. While holding the end of the display cable inside the ZIF connector slide, press down both ends of the slide simultaneously to secure the cable in the ZIF connector (Figure 3-100).[...]

13. Ensure that the cable has been seated evenly and that the white line on the cable is level. 14. Replace the keyboard assembly (Section 3.7). Chapter 3.23 Color STN (9.5 inch) Display (Models 400 and 410) IMPORTANT: The Monochrome, CSTN and the CTFT displays have different removal and replacement procedures. Be sure to follow the procedures for [...]

Removing the CSTN (9.5 inch) Panel, Shield, Display Cable, and the Display Ground Cable To remove the liquid crystal display CSTN (9.5 inch) panel, the shield, the display cable and the display ground cable, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. [...]

6. Disconnect the display ground cable [1] from the LIF clip above the serial port connector (Figure 3-102).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To prevent damage to the trough, ensure that the trough does not tilt forwar[...]

135-degrees (Figure 3-103). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When servicing the computer, ensure that cables [...]

12. Carefully remove the CSTN (9.5 inch) panel, display cable, and shield from the display enclosure (Figure 3-105).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Excess flexing and bending of the shield tabs and fingers can damage the shi[...]

14. Lay the CSTN (9.5 inch) panel face down on a clean surface. 15. Slide the display shield off the CSTN (9.5 inch) panel (Figure 3-107).[...]

16. Disconnect the display cable from the connector on the back of the CSTN (9.5 inch) panel (Figure 3-108).[...]

17. Lift the display ground cable out of the display enclosure (Figure 3-109).[...]

Replacing the Display Ground Cable, Display Cable, Shield, and the CSTN (9.5 inch) Panel To replace the display ground cable, the display cable, the shield, and the CSTN (9.5 inch) panel, follow these steps: 1. Position the display ground cable in the display enclosure, aligning the cable with the bosses in the display enclosure (Figure 3-110).[...]

2. Connect the display cable to the connector on the back of the CSTN (9.5 inch) panel (Figure 3-111).[...]

3. Slightly lift the tabs on the left side of the display shield and slide the shield onto the CSTN (9.5 inch) panel. Ensure that the LIF connector end of the display cable is exposed on the right side of the CSTN (9.5 inch) panel (Figure 3-112).[...]

4. Place the display shield tabs in the indentations on the sides of the CSTN (9.5 inch) panel (Figure 3-113).[...]

5. Align the CSTN (9.5 inch) panel, display cable, and shield in the display enclosure and replace the screws. Ensure that the ZIF connector end of the display cable and the end of the display ground cable are exposed at the bottom of the display enclosure (Figure 3-114).[...]

6. Connect the display cable and the backlight cable to the inverter board (Section 3.23). 7. Replace the inverter board (Section 3.23). 8. Replace the bezel (Section 3.23). 9. Connect the display ground cable [1] from the LIF clip above the serial port connector (Figure 3-115).[...]

10. Carefully insert the end of the display cable into the ZIF connector slide on the system board. IMPORTANT: Ensure that the ZIF connector slide is in its fully upward position and that it remains so while you are inserting the cable into it. Before closing the slide, ensure that the cable is fully seated (to the white insertion line) in the ZIF [...]

12. Ensure that the cable has been seated evenly and that the white line on the cable is level. 13. Replace the keyboard assembly (Section 3.7). Chapter 3.24 Color TFT (8.4 inch) Display (Models 400 and 410) IMPORTANT: The Monochrome, CSTN and the CTFT displays have different removal and replacement procedures. Be sure to follow the procedures for [...]

Removing the CTFT (8.4 inch) Liquid Crystal Display Panel To remove the CTFT (8.4 inch) panel, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>>>>>>>>>>>>>>>>>>>>&[...]

5. Remove the inverter board (Section 3.21). 6. Remove the display cable and backlight cable from the inverter board (Section 3.21). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<[...]

8. Carefully rotate the CTFT (8.4 inch) panel down and out of the display enclosure, laying the CTFT (8.4 inch) panel gently on the keyboard assembly (Figure 3-119).[...]

9. Remove the display cable from the connector on the back of the panel by pulling the tabs at the back of the connector (Figure 3-120).[...]

Replacing the CTFT (8.4 inch) Display Panel To replace the CTFT (8.4 inch) panel, follow these steps: 1. Connect the display cable to the connector on the back of the CTFT (8.4 inch) panel (Figure 3-121).[...]

2. Position the CTFT (8.4 inch) panel into the display enclosure, ensuring that the ZIF connector end of the display cable is exposed on the right side of the CTFT (8.4 inch) panel (Figure 3-122).[...]

3. Secure the CTFT (8.4 inch) panel with four screws to the display enclosure. Removing the CTFT (8.4 inch) Display Cable To remove the CTFT (8.4 inch) display cable, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>>&[...]

The ZIF connector and its attached cable can be damaged easily. Handle only the connector slide when disconnecting the ZIF connector. Never pull or twist the cable itself while it is seated in the ZIF connector. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g[...]

The ZIF connector and its attached cable can be damaged easily. Handle only the connector slide when disconnecting the ZIF connector. Never pull or twist the cable itself while it is seated in the ZIF connector. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g[...]

7. Ensure that the cable has been seated evenly and that the white line on the cable is level. 8. Replace the keyboard assembly (Section 3.7). Removing and Replacing the CTFT (8.4 inch) Display Shield To remove the CTFT (8.4 inch) display shield, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pac[...]

4. Remove the inverter board (Section 3.21). 5. Remove the display cable and backlight cable from the inverter board (Section 3.21). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<[...]

9. To replace the display shield, reverse the previous steps. Removing and Replacing the Display Ground Cable To remove the display ground cable, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>>>>>>>&g[...]

5. Remove the display cable and backlight cable from the inverter board (Section 3.21). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<&[...]

11. To replace the display ground cable, reverse the previous steps. Chapter 3.25 Display Components (Models 420 and 430) This section contains removal and replacement procedures for the following display assembly components: o Bezel o Latches o Inverter board Removing and Replacing the Display Bezel To remove the display bezel, follow these steps:[...]

2. Open the computer. 3. Remove the four screws from the display bezel (Figure 3-129). 4. Separate the display bezel from the display assembly (Figure 3-130).[...]

5. To replace the bezel, reverse the previous steps. Removing the Display Enclosure Latches and Springs To remove the display enclosure latches and springs from either side of the display enclosure, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. 3. Remove[...]

6. Remove the display latch spring from the latch (Figure 3-132).[...]

Replacing the Display Enclosure Springs and Latches To replace the display springs and latches, follow these steps: 1. Hook the display latch spring on to the display latch [1] and place the display latch spring over the post in the display enclosure [2] (Figure 3-133).[...]

2. Slide the display latch into place on either side of the display enclosure (Figure 3-134).[...]

Removing the Display Inverter Board for the CSTN (10.4 inch) Display >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Ensure [...]

location to avoid pinching during the reassembly process. Improper cable placement can cause severe damage to the unit. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<&l[...]

the ground wire which is attached to the inverter board. Removing the Display Inverter Board for the CTFT (10.4 inch) Display >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<[...]

To remove the inverter board for the CTFT (10.4 inch) Display, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. 3. Remove the display bezel. Refer to "Removing and Replacing the Display Bezel" in this section. >>>>>>>>>&[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Ensure that the power cord is disconnected from the electrical outlet and th[...]

Replacing the Display Inverter Board To replace the inverter board, follow these steps: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<&[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 1. Insert the inverter board LIF connector into t[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The ZIF connector and its attached cable can be damaged easily. Handle only [...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To prevent damage to the trough, ensure that the trough does not tilt forwar[...]

135-degrees (Figure 3-142). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When servicing the computer, ensure that cables [...]

12. Carefully remove the CSTN (10.4 inch) panel, display cable, and shield from the display enclosure (Figure 3-144).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Excess flexing and bending of the shield tabs and fingers can damage the shi[...]

14. Lay the CSTN (10.4 inch) panel face down on a clean surface. 15. Slide the display shield off the CSTN panel (Figure 3-146).[...]

16. Only Sharp panels require the XOVER Board. Remove the ground wire connecting the XOVER Board with the CSTN (10.4 inch) Panel (Figure 3-147).[...]

17. Disconnect the display cable from the connector on the back of the CSTN (10.4 inch) panel (Figure 3-148).[...]

17. Lift the display ground cable out of the display enclosure (Figure 3-149).[...]

Replacing the Display Ground Cable, Display Cable, Shield, and the CSTN (10.4 inch) Panel To replace the display ground cable, display cable, shield, and the CSTN (10.4 inch) panel, follow these steps:[...]

1. Position the display ground cable in the display enclosure, aligning the cable with the bosses in the display enclosure (Figure 3-151). 2. If the CSTN panel is manufactured by Sharp complete this step. If not, continue to step 4. Connect the display cable to the XOVER Board. Then connect the XOVER Board to the connector on the back of the CSTN ([...]

3. If the CSTN panel is manufactured by Sharp complete this step. If not, continue to the next step. Peel off the adhesive from the back of the rubber pad found in the spare kit. Place this pad on the display enclosure indicated by the embossed area (Figure 3-152).[...]

4. Slightly lift the tabs on the left side of the display shield and slide the shield onto the CSTN (10.4 inch) panel. Ensure that the LIF connector end of the display cable is exposed on the right side of the CSTN (10.4 inch) panel (Figure 3-153).[...]

5. Place the display shield tabs in the indentations on the sides of the CSTN (10.4 in) panel (Figure 3-154).[...]

6. Align the CSTN (10.4 inch) panel, display cable, and shield in the display enclosure and replace the screws. Ensure that the ZIF connector end of the display cable and the end of the display ground cable are exposed at the bottom of the display enclosure (Figure 3-155).[...]

7. Connect the display cable and the backlight cable to the inverter board (Section 3.25). 8. Replace the inverter board (Section 3.25). 9. Replace the bezel (Section 3.25). 10. Connect the display ground cable [1] from the LIF clip above the serial port connector (Figure 3-156).[...]

11. Carefully insert the end of the display ground cable into the ZIF connector slide on the system board. IMPORTANT: Ensure that the ZIF connector slide is in its fully upward position and that it remains so while you are inserting the cable into it. Before closing the slide, ensure that the cable is fully seated (to the white insertion line) in t[...]

13. Ensure that the cable has been seated evenly and that the white line on the cable is level. 14. Replace the keyboard assembly (Section 3.7). Chapter 3.27 Color TFT (10.4 inch) Display (Models 420 and 430) IMPORTANT: The Monochrome, CSTN and the CTFT displays have different removal and replacement procedures. Be sure to follow the procedures for[...]

Removing the CTFT Display Panel To remove the CTFT (10.4 inch) panel, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTI[...]

NOTE: The CTFT (10.4 inch) display is different than all other displays. The inverter board fits partially behind the display. Loosen the screws on the display to slide the inverter out from behind the display. 5. Remove the inverter board (Section 3.25). 6. Remove the display cable and backlight cable from the inverter board (Section 3.25). 7. Rem[...]

8. Carefully rotate the CTFT (10.4 inch) panel down and out of the display enclosure, laying the CTFT (10.4 inch) panel gently on the keyboard assembly (Figure 3-160).[...]

9. Remove the display cable from the connector on the back of the panel (Figure 3-161).[...]

10. The CTFT Display Cable is disconnected by pulling upward on the tabs on the back of the Connector. Replacing the CTFT (10.4 inch) Display Panel >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<&[...]

2. Position the CTFT (10.4 inch) panel into the display enclosure, ensuring that the ZIF connector end of the display cable is exposed on the right side of the CTFT (10.4 inch) panel (Figure 3-163).[...]

3. Secure the CTFT (10.4 inch) panel with four screws to the display enclosure. Removing the CTFT (10.4 inch) Display Cable To remove the CTFT (10.4 inch) display cable, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>&g[...]

The ZIF connector and its attached cable can be damaged easily. Handle only the connector slide when disconnecting the ZIF connector. Never pull or twist the cable itself while it is seated in the ZIF connector. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g[...]

The ZIF connector and its attached cable can be damaged easily. Handle only the connector slide when disconnecting the ZIF connector. Never pull or twist the cable itself while it is seated in the ZIF connector. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g[...]

7. Ensure that the cable has been seated evenly and that the white line on the cable is level. 8. Replace the keyboard assembly (Section 3.7). Removing and Replacing the CTFT (10.4 inch) Display Shield To remove the CTFT (10.4 inch) display shield, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery p[...]

4. Remove the inverter board (Section 3.25). 5. Remove the display cable and backlight cable from the inverter board (Section 3.25). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<[...]

9. To replace the display shield, reverse the previous steps. Removing and Replacing the Display Ground Cable To remove the display ground cable, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Open the computer. >>>>>>>>>>>>>>>&g[...]

5. Remove the display cable and backlight cable from the inverter board (Section 3.25). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<&[...]

11. To replace the display ground cable, reverse the previous steps. Chapter 3.28 Display Enclosure This section provides replacement procedures for the display enclosure. Replacing the Display Enclosure To replace the display enclosure, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Sectio[...]

the display is opened. To prevent damage to the display and the computer, ensure that the display assembly is opened at a 90-degree angle. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<[...]

8. Disconnect the display ground cable [1] from the LIF clip (Figure 3-172).[...]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< To prevent damage to the display assembly while the keyboard assembly is rem[...]

11. Lift the display assembly off the system unit module (Figure 3-174).[...]

12. Position the display assembly top-side up. 13. Remove the display bezel (Section 3.25). 14. Remove the display latches and springs (Section 3.25). 15. Remove the inverter board (Section 3.21). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<[...]

placement can cause severe damage to the unit. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 17[...]

21. Replace the display ground cable, the LCD panel, the shield, and the display cable into the display enclosure as follows: - If replacing a Monochrome panel and shield, refer to Section 3.22. - If removing a CSTN (9.5 in) panel and shield, refer to Section 3.23. - If removing a CTFT (8.4 in) panel and shield, refer to Section 3.24. - If removing[...]

27. Align the clutches with the system unit module, ensuring that the display ground cable and the display cable are positioned on top of the system unit module (Figure 3-178).[...]

28. Replace the four rear clutch screws (Figure 3-179).[...]

29. Open the display to a 90-degree angle (Figure 3-180).[...]

30. Connect the display ground cable [1] to the LIF clip above the serial port connector between the system board and the system chassis (Figure 3-181).[...]

31. Carefully insert the end of the cable into the ZIF connector slide on the system unit. IMPORTANT: Ensure that the ZIF connector slide is in its fully upward position and that it remains so while you are inserting the cable into it. Before closing the slide, ensure that the cable is fully seated (to the white insertion line) in the ZIF connector[...]

33. Ensure that the cable has been seated evenly and that the white line on the cable is level. 34. Replace the right clutch ground clip located between the clutch and the CPU base. The right clutch clip for Models 420 and 430 is different and is illustrated in the insert Figure 3-183).[...]

35. Replace the keyboard assembly (Section 3.7). 36. Replace the tilt feet (Section 3.4). 37. Replace the handle bracket (Section 3.3). Chapter 3.29 Clutches and Ground Clips This section contains removal and replacement procedures for the clutch ground clips located between the system chassis and CPU base, and for the clutches that join the system[...]

4. Remove the right clutch ground clip located between the clutch and the CPU base. The right clutch clip for Models 420 and 430 is different and is illustrated in the insert (Figure 3-185).[...]

5. To replace the clutch ground clips, reverse the previous steps. Removing and Replacing the Clutches To remove the clutches, follow these steps: 1. Disconnect all power from the computer and remove the AC Adapter and battery pack (Section 3.2). 2. Remove the handle brackets from each side of the computer (Section 3.3). 3. Remove the tilt feet fro[...]

5. Remove the left and right clutch ground clips (see "Removing and Replacing Clutch Ground Clips" in this section). 6. Pull up both ends of the ZIF connector slide simultaneously [1], carefully opening the slide [2] (Figure 3-186). 7. Lift the display cable out of the connector slide [3], being careful not to pull or twist the cable (Fig[...]

9. Using a Torx T8 or slotted driver, remove the four clutch screws on the rear of the system unit module (Figure 3-188).[...]

10. Lift the display assembly off the system unit module (Figure 3-189).[...]

11. Place the display assembly top-side up. 12. Remove the display bezel (Section 3.21). 13. Remove the screws from the clutches on either side of the display enclosure. 14. On either side of the display enclosure, slide the clutches from underneath the display shield tabs (Figure 3-190).[...]

15. Slide the clutches out of the display enclosure. 16. To replace the clutches, reverse the previous steps. IMPORTANT: When replacing the display clutch screws, ensure proper alignment of the display clutches on either side of the display enclosure with the shield (Figure 3-191).[...]

Chapter 3.30 Docking Base This section contains removal procedures for the following docking base components: o Battery Door o Feet o Handle Removing the Battery Door To remove the battery door, follow these steps: 1. Open the battery door until it is perpendicular to the docking base (Figure 3-192).[...]

2. Hold the door upright, applying pressure to the door at the base of the front hinge [1]. This creates a pivot point [2] to rotate the door out of the base (Figure 3-193). 3. Flex the front end of the door until the retaining pin [3] clears the hinge slot on the docking base (Figure 3-193).[...]

4. Remove the battery door from the docking base (Figure 3-194).[...]

5. To replace the battery door, reverse the previous steps. Replacing the Docking Base Feet To replace the docking base feet, follow these steps: 1. Remove the top layer from the foot to expose the adhesive strip (Figure 3-195). 2. Place the foot adhesive-side down into the circular indentation on the bottom of the docking base (Figure 3-195).[...]

Replacing the Handle To replace the docking base handle, follow these steps: 1. Using a Torx T8, remove the screw from the rear of the handle (Figure 3-196).[...]

2. Slide the handle off the crankshaft (Figure 3-197).[...]

3. Slide the new handle on the crankshaft until the handle seats. 4. To secure the new handle to the crankshaft, replace the screw behind the handle. Chapter 3.31 Monitor Support Cover This section contains replacement procedures for the foot on the monitor support cover. To replace the foot, follow these steps: 1. Turn the monitor support cover to[...]

[...]

Chapter 4. Running POST and Test Intr odu ct ion This chapter covers troubleshooting information for the computer. The basic steps in troubleshooting include: 1. Follow the preliminary steps listed in Section 4.1. 2. Run the Power-On Self-Test (POST) as described in Section 4.2. 3. Run Computer Checkup (TEST) as described in Section 4.3. 4. Follow [...]

5. Disconnect any external devices that you do not want to test. (Do not disconnect the printer if you want to test it or use it to log error messages.) 6. Install loopback and terminating plugs in the serial and parallel connectors if you would like to test these ports. 7. Ensure that the hard drive is installed in the computer. 8. Connect the com[...]

9. Connect the power cord (Section 3.2). 10. Connect the power cord to the external outlet. 11. Turn on the computer by pressing the power button. 12. Verify that the power-on password has been cleared. If it has not been cleared, repeat steps 1 through 7. If the password is still not cleared refer to the following section for removal procedures. -[...]

boots from the hard drive (or from a bootable diskette if installed in the diskette drive). However, diskette drive may be disabled, and the computer cannot boot from the diskette drive. - If POST detects errors, the errors are indicated by screen and/or audible messages. Refer to "Power-On Self-Test (POST) Error Messages" in this section[...]

5. Select the option to view the device list. A list of the installed hardware devices is displayed. NOTE: Computer Checkup does not detect all non-Compaq devices. 6. Verify that Computer Checkup correctly detected the installed devices. If the list is correct, select OK. The Computer Checkup option menu is displayed again. If the list is incorrect[...]

help identify possible defective assemblies. Tables 5-2 through 5-13 list Computer Checkup error codes, a description of the error condition, and the recommended action for resolving the condition. For removal and replacement procedures, refer to Chapter 3. IMPORTANT: Rerun Computer Checkup each time you complete a recommended action step. If the p[...]

Chapter 5. Error Messages and Codes Intr odu ct ion This chapter provides tables covering possible errors messages for the Power-On Self-Test (POST) and the Computer Checkup (TEST) diagnostics. Chapter 5.1 Power-On Self-Tes t (POST) POST error messages occur when problems are discovered during POST. Table 5-1 lists visual error messages for POST, a[...]

--------------------------------------------------------------------------- Message Beeps Probable Cause Recommended Action --------------------------------------------------------------------------- 168 - CMOS 1. Autosetup will configure CheckSUM to the default settings. Invalid 2. Run Computer Setup if configuration settings are other than defaul[...]

Keyboard 2. Replace system board. Error or Text Fixture Installed --------------------------------------------------------------------------- 303 - None System board Replace the system board. Keyboard keyboard Controller controller Error --------------------------------------------------------------------------- 304 - Keyboard None Keyboard 1. Chec[...]

Been Detected 3. Replace the system board. by POST --------------------------------------------------------------------------- 1125 - 2 Short Defective 1. Run Computer Setup and Internal internal serial Check it. Serial Port port 2. Replace the system board. Failure --------------------------------------------------------------------------- 1780 - [...]

103 - xx DMA page registers test Replace the system board. failed 104 - xx Interrupt controller Replace the system board. master test failed 105 - xx Port 61 error Replace the system board. 106 - xx Keyboard controller 1. If using an external self-test failed keyboard, try another keyboard. If second keyboard passes, replace first one. 2. Replace t[...]

204 - xx Memory address test If you don't have a memory failed expansion board, replace the system board. 206 - xx Increment pattern test If you have a memory expansion failed board: 210 - xx Random pattern test 1. Remove the memory expansion failed board and reinstall a new board. 2. Replace the memory expansion board. =======================[...]

connected =========================================================================== Table 5-6. Diskette Drive Computer Checkup Error Codes =========================================================================== Error Code Description Recommended Action =========================================================================== 600 - xx Disket[...]

Test 1201 - xx through 1210 - xx error codes: 1202 - xx Modem Timeout Test 1. Refer to modem documentation for correct setup procedures. 1203 - xx Modem External 2. Check the modem line. Termination Test 3. Replace the modem. 1204 - xx Modem Auto Originate Test 1206 - xx Dial Multifrequency Tone Test 1210 - xx Modem Direct Connect Test ============[...]

1716 - xx Hard drive conditional format test failed 1717 - xx Hard drive ECC * test failed 1719 - x Hard drive power mode test failed 1799 - xx Invalid hard drive type failed --------------------------------------------------------------------------- * Error Correction Code ===========================================================================[...]

2419 - xx ECG/VGC ROM checksum test failed 2421 - xx ECG/VGC 640 x 200 graphics mode test failed --------------------------------------------------------------------------- Error Code Description Recommended Action --------------------------------------------------------------------------- 2422 - xx ECG/VGC 640 x 350 16 The following step applies t[...]

2. Clean trackball. 3. Ensure trackball connector is seated properly. 4. Replace the trackball assembly. 5. Replace the system board. =========================================================================== Chapter 5.3 Troubleshooting without Error Messages This section contains troubleshooting information that provides a quick reference for dia[...]

--------------------------------------------------------------------------- Computer is beeping and Computer has Immediately save any open battery indicator is entered a low file(s). Then do any one flashing. battery condition. of the following: o Connect the computer to an external power source, then charge the battery pack. o Replace the battery [...]

------------------------------------------------ Battery contacts Remove the keyboard not making good assembly and examine the contact with battery contacts. Ensure battery. that the battery is making good contact with all 4 contacts. Replace the system board. ------------------------------------------------ Defective system Replace the system boar[...]

and attempt to power the unit up. If the unit powers up, replace the inverter board. b. Disconnect the display cable from the display panel and power the unit up. If the unit powers up, replace the display panel. c. Replace the display cable. 3. Replace the system board. =========================================================================== Ta[...]

exposed to pack to return to room temperature temperature. extremes. ------------------------------------------------ Battery pack is at Replace battery pack. end of its life. --------------------------------------------------------------------------- Battery charge does not Battery is being Keep computer at a cooler last as long as exposed to high[...]

* The recommended storage temperature range for the battery pack is -4oF to 86oF (-20oC to 30oC ). The recommended operating temperature range is 50oF to 104oF (10oC to 40oC). =========================================================================== Table 5-16. Solving Battery Gauge Problems =======================================================[...]

lack of user activity. --------------------------------------------------- Brightness and Press the Fn + F9 keys to contrast needs adjust the brightness. Use adjusting. the left and right arrow keys to adjust brightness. Press the Fn + F8 keys to adjust the contrast. --------------------------------------------------- Display has If computer is in [...]

Distorted or garbled The ANSI.SYS driver Add the ANSI.SYS driver to characters on the is not in the the CONFIG.SYS file. Add display are mixed CONFIG.SYS file or the following line: with text. the path is DEVICE=C:ANSI.SYS incorrect. --------------------------------------------------------------------------- Computer display Using 800 x 600 or Res[...]

light up at all and Power-On-Self-Test (POST) does not complete when the unit is powered up. **** --------------------------------------------------------------------------- ** When using an external monitor and simultaneously displaying an image on the internal display, the image on the external monitor may not fill the screen. **** Blocks usually[...]

"jailbars" pattern), a. System board has a single color b. Display panel on it, or has garbled c. Inverter board graphics across the --------------------------------------------------- entire panel. This Defective display Replace the display cable. failure is for cable patterns across the --------------------------------------------------[...]

=========================================================================== Diskette drive Diskette is damaged. Run CHKDSK on the diskette. indicator stays on. At the system prompt, type: CHKDSK A: --------------------------------------------------- Software program is Check the program damaged. diskettes. ------------------------------------------[...]

on, in Standby, or in make sure computer is off, Hibernation. unplugged, and the battery pack is removed. =========================================================================== Table 5-20. Solving External Device Installation Problems =========================================================================== Problem Probable Cause Solution(s)[...]

--------------------------------------------------------------------------- Trackball or mouse Mouse device driver Enter MOUSE at the system does not work even is not activated prompt to activate the though the device (loaded into memory) mouse device driver. driver is in the in MS-DOS. PATH command of the Add a line in the AUTOEXEC.BAT file. AUTOE[...]

When turned on, the Card is not inserted Remove and reinsert the computer does not properly. card in the correct beep when a PC Card orientation. is inserted. --------------------------------------------------- PC Card beeps are From MS-DOS: Run the PCCARD disabled. utility to re-enable PC Card beeps. From Windows: Select Computer Setup from the Co[...]

determine which COM port is assigned to the card. --------------------------------------------------- The card conflicts From MS-DOS: Run PCCARD to with the system board select a different COM serial device. port for the PC Card. From Windows: Select Computer Setup from the Compaq Control Center, then select the PC Card option and choose a differen[...]

-------------------------------------------------- The card is not From MS-DOS: For memory formatted. cards, run MEMCARD to format the card. For hard drive cards and flash mass storage cards, run ATACARD, then run FORMAT. From Windows: Select Computer Setup from the Compaq Control Center, then select MEMCARD or ATACARD from the PC Card option. ----[...]

Table 5-26. Solving Software Application Problems =========================================================================== Problem Probable Cause Solution(s) =========================================================================== Cannot use an The application has 1. Add or edit the application. not been added to the application entry in the [...]

o Type of printer connected o Hardware/software being used o Printed results of Computer Checkup (TEST) and View System Information (INSPECT), if possible o Printed copies of CONFIG.SYS and AUTOEXEC.BAT files, if possible Chapter 5.5 Shipping Preparation To ship the computer, complete the following steps: 1. Back up the critical hard drive files. E[...]

Chapter 6. Specifications Intr odu ct ion This chapter provides physical, environmental, and performance specifications for the computer and its subassemblies including the following: o Monochrome STN display o Color STN and TFT displays o Hard drives o Diskette drive o NiMH battery pack o AC Adapter o Docking Base Chapter 6.1 Computer Table 6-1. C[...]

--------------------------------------------------------------------------- Environmental Requirements Temperature: Operating 50oF to 104oF 10oC to 40oC Nonoperating -4oF to 140oF -20oC to 60oC Relative Humidity: (noncondensing) Operating 10% to 90% Nonoperating 5% to 95% Maximum Altitude: (nonpressurized) Operating 10,000 ft 3658 m Nonoperating 30[...]

Operating 10% to 90% Nonoperating 5% to 95% Maximum Altitude (unpressurized): Operating 10,000 ft 3658 m Nonoperating 30,000 ft 12192 m --------------------------------------------------------------------------- Shock and Vibration Shock: Operating 10 g, 11 ms, half sine Nonoperating 60 g, 11 ms, half sine Vibration: Operating 0.25 g, 5-500 Hz 1/2 [...]

=========================================================================== Table 6-4. Color STN (9.5 inch) Display Models 400 and 410 =========================================================================== English Metric =========================================================================== Dimensions (display size): Height 5.7 in 14.4 cm[...]

--------------------------------------------------------------------------- Pixel Size: Pitch 0.27 x 0.27 mm Format 640 x 480 Configuration RGB Stripe --------------------------------------------------------------------------- Backlight CCFT-Edgelit at Top --------------------------------------------------------------------------- Character Display[...]

Output Voltage 500 Vac Maximum Input Power 3.5 W Maximum Output Power 2.5 W =========================================================================== Table 6-7 Color TFT (10.4 inch) Display Models 420 and 430 =========================================================================== English Metric ================================================[...]

Drive Type 65 (soft) 65 (soft) 65 (soft) --------------------------------------------------------------------------- Drive Height: With drive frame 12.7 mm 12.7 mm 12.7mm --------------------------------------------------------------------------- Drive Size: Inches 2.5 x 0.5 2.5 x 0.5 2.5 x 0.5 Centimeters 6.3 x 1.3 6.3 x 1.3 6.3 x1.3 -------------[...]

Media (Mb/s) 19 to 33 26.9 to 39.5 26.9 to 39.5 Interface (MB/s) 11.1 11.1 11.1 --------------------------------------------------------------------------- Sector Interleave 1:1 1:1 1:1 --------------------------------------------------------------------------- Typical Seek Time (including settling): Single Track (ms) 3.0 4.0 4.0 Average (ms) 13.0 [...]

Low --------------------------------------------------------------------------- Rotational Speed 300 rpm --------------------------------------------------------------------------- Read/Write Heads 2 --------------------------------------------------------------------------- Average Access Time (ms): Track-to-Track (high/low) 3/3 Average (high/low)[...]

Height 1.3 in 3.3 cm Depth 3.0 in 7.6 cm Width 5.0 in 12.7 cm --------------------------------------------------------------------------- Weight (without cords) 6 oz 0.227 kg --------------------------------------------------------------------------- Power Supply Ratings: Voltage Range 100-120 100-120 220-240 V 220-240 V Input Current 0.8A/0.4 A 0.[...]