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Compaq manual 257

Models: 400 486 DX2/40 MHZ 250 MB 4 MB 9.5 400C 486 DX2/40 MHZ 250 MB 4 MB 9.5 400CX 486 DX2/40 MHZ 250 MB 4 MB 8.4 410 486 DX2/50 MHZ 250 MB 4 MB 9.5 410C 486 DX2/50 MHZ 250 MB 4 MB 9.5 410C 486 DX2/50 MHZ 350 MB 4 MB 9.5 410CX 486 DX2/50 MHZ 350 MB 4 MB 8.4 420C 486 DX4/75 MHZ 350 MB 4 MB 10.4 420C 486 DX4/75 MHZ 420 MB 8 MB 10.4 420CX 486 DX4/75 MHZ 420 MB 8 MB 10.4 430C 486 DX4/100 MHZ 420 MB 8 MB 10.4 430C 486 DX4/100 MHZ 720 MB 8 MB 10.4 430CX 486 DX4/100 MHZ 720 MB 8 MB 10.4

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Contents
Page Notice Preface Page Chapter 1. Illustrated Parts Catalog Introduction Chapter 1.1 Illustrated Parts Breakdown Chapter 1.2 Serial Number Chapter 1.3 System Unit Module Overview Page Page Page Page Chapter 1.4 Display Assembly Overview Page Chapter 1.5 Docking Base Chapter 1.6 Monitor Support Cover Chapter 1.7 System Unit Module Parts Page Page Page Chapter 1.8 Monochrome Display Assembly Parts Page Chapter 1.9 Color STN (9.5 inch) Display Assembly Parts Chapter 1.10 Color STN (10.4 inch) Display Assembly Parts Chapter 1.11 Color TFT (8.4 inch) Display Assembly Parts Chapter 1.12 Color TFT (10.4 inch) Display Assembly Parts Chapter 1.13 Keyboards Page Page Chapter 1.14 Cables (Models 400 and 410) Chapter 1.15 Cables (Models 420 and 430) Chapter 1.16 Ac Adapter and Power Cord Chapter 1.17 Memory and Processor Chapter 1.18 Miscellaneous Carrying Devices Chapter 1.19 Docking Base and Monitor Support Cover Chapter 1.20 Miscellaneous CPU Kits Page Chapter 1.21 Fastener List Chapter 1.22 Documentation and Software Page Page Chapter 2. Preparing the Computer for Service Chapter 2.1 Electrostatic Discharge Page Page Chapter 2.2 Service Preliminaries Page Chapter 2.3 Disposal of a Used Battery Page Chapter 3. Removal and Replacement Procedures Chapter 3.1 Disassembly/Assembly Sequence Chart Page Chapter 3.2 Preparing the Computer Page Page Page Chapter 3.3 Handle Bracket Page Chapter 3.4 Tilt Feet Chapter 3.5 Hard Drive Page Page Page Page Chapter 3.6 Memory Expansion Board Page Page Page Chapter 3.7 Keyboard Assembly Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.8 Battery Compartment Components Page Page Page Chapter 3.9 Real-TimeClock Battery (Models 400 and 410) Chapter 3.10 Real-TimeClock Battery (Models 420 and 430) Page Chapter 3.11 Processor Upgrade Option (Model 400 Only) Chapter 3.12 Integrated Mechanical Trackball Assembly (Models 400 and 410) Page Page Chapter 3.13 Integrated Optical Trackball Assembly (Models 420 and 430) Page Page Chapter 3.14 Diskette Drive (All Models) Page Page Page Page Page Page Chapter 3.15 The System Board (All Models) Page Page Page Page Page Page Page Page Page Page Page Chapter 3.16 PC Card (PCMCIA) Assembly Page Chapter 3.17 PC Card (PCMCIA) Ejection Levers and Pin Page Page Chapter 3.18 PC Card (PCMCIA) Doors and Springs Page Page Page Page Page Chapter 3.19 System Chassis (All Models) Page Page Page Chapter 3.20 CPU Base (All Models) Page Page Chapter 3.21 Display Assembly Components (Models 400 and 410) Page Page Page Page Page Page Page Page Chapter 3.22 Monochrome Display (Models 400 and 410) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.23 Color STN (9.5 inch) Display (Models 400 and 410) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.24 Color TFT (8.4 inch) Display (Models 400 and 410) Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.25 Display Components (Models 420 and 430) Page Page Page Page Page Page Page Page Page Page Page Chapter 3.2 Color STN (10.4 inch) Display (Models 420 and 430) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.27 Color TFT (10.4 inch) Display (Models 420 and 430) Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.28 Display Enclosure Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3.29 Clutches and Ground Clips Page Page Page Page Page Page Page Chapter 3.30 Docking Base Page Page Page Page Page Chapter 3.31 Monitor Support Cover Page Chapter 4. Running POST and Test Chapter 4.1 Preliminary Steps Page Chapter 4.2 Power-On Self-Test(POST) Chapter 4.3 Computer Checkup (TEST) Page Page Chapter 5. Error Messages and Codes Chapter 5.1 Power-On Self-Test(POST) Page Page Chapter 5.2 Computer Checkup (TEST) Error Codes Page Page Page Page Page Page Chapter 5.3 Troubleshooting without Error Messages Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 5.4 Contacting Compaq Support Chapter 5.5 Shipping Preparation Chapter 6. Specifications Chapter 6.1 Computer Page Chapter 6.2 Displays Page Page Chapter 6.3 Hard Drives Page Chapter 6.4 Diskette Drive Chapter 6.5 Nickel Metal Hydride (NiMH) Battery Pack Chapter 6.6 AC Adapter Chapter 6.7 Docking Base