Manuals / Compaq / Computer Equipment / Personal Computer

Compaq Essential Maintenance and Service Guide for the 386

Models: 386

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Display Characteristics Install Parts list Error messages Problem Isolation Flowchart Error Detection and Correction Maintenance Mass Storage Configurations Advanced Diagnostics Program Setup Program

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COMPAQ DESKPRO 386 Personal Computer

MAINTENANCE AND SERVICE GUIDE

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Compaq manual Compaq Deskpro 386 Personal Computer, Maintenance and Service Guide

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Contents

Compaq Deskpro 386 Personal Computer Maintenance and Service GuidePage Maintenance and Service Guide Page Connector Preface Summary of Text Page Required Tools and Supplies Additional Information Contents Setup Program Illustrated Parts Catalog Jumper Settings and Switch Settings Mass Storage Configurations Page Figures Xvi Xvii Xviii Xix Tables Xxi Page Addendum 108431-001 11-88 to Manual No Page Introduction Operating and Performance Specifications Compaq Deskpro 386 Personal Computer System Unit Compaq Enhanced Keyboard 84-KEY Keyboard Compaq DUAL-MODE Monitor Compaq Color Monitor Compaq Video Graphics Color Monitor Maintenance and Service Guide Compaq Video Graphics Monochrome Monitor Maintenance and Service Guide 360-KBYTE 5¼-INCH Diskette Drive 10 1.2-MEGABYTE 5¼-INCH Diskette Drive 11 1.44-MEGABYTE 3½-INCH Diskette Drive 12 40-MEGABYTE Fixed Disk Drive 13 70-MEGABYTE Fixed Disk Drive 14 130-MEGABYTE Fixed Disk Drive 15 40-MEGABYTE Fixed Disk Drive Backup 16 135-MEGABYTE Fixed Disk Drive Backup Tape 17 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit 18 300-MEGABYTE Fixed Disk Drive for the Expansion Unit Page Contents Page POWER-ON SELF-TEST Post POWER-ON SELF-TEST POST/PROBLEM Isolation Problem Isolation Flowchart Preliminary Steps to Problem Isolation Complete Preliminary Steps Turn AC power Switch on Did Yes Brightness See Chapter To E Did you Yes Hear other Audible error Codes beeps? Power-On Self-Test Post/Problem Isolation When to RUN Setup HOW to RUN Setup Page When to RUN Setup Setup Program HOW to RUN Setup Advanced Diagnostics Program Addendum 108431-001 11-88 to Manual No Addendum 108431-001 11-88 to Manual No Addendum 108431-001 11-88 to Manual No Preliminary Steps Advanced Diagnostics Program Main Menu Run the Diagnostic Tests Clear Configuration and Run the Setup Program Run the Setup ProgramFormat a Diskette Display ROM Versions System Test Menu Advanced Diagnostics ProgramTest Logging Utilities Menu Processor Test Selection Menu Keyboard MemoryParallel Interface Video CGA DMM Color Mono MDA Matrix of Possible Video Tests Video Controller Display Characteristics80 x 25 Display Character Set 40 x 25 Display 640 x 200 Standard Graphics 320 x 200 Standard Graphics Display Memory Pages Lightpen Noise Gray Scale/Color 640 x 200 Color Graphics Enhanced Display Characteristics 640 x 350 Color Graphics 640 x 350 Monochrome Graphics Monochrome Text 640 x 480 Graphics Color Mode Diskette Drive Monochrome Video Board Format a Diskette for diagnostic use onlyAsynchronous Communications Interface Diskette Change Line Auto Answer Mode Auto Originate ModeModem Modem Internal Loopback Modem Direct Connect Fixed Disk DriveWrite/Read/Compare on Test Cylinder Seek Head Select Error Detection and CorrectionRun All the Above Tests Read Verify Unconditional Format Conditional Format Change Interleave Surface AnalysisDisplay Current Interleave Fixed Disk Drive Backup Tape Fixed Disk Drive Backup Media Fixed Disk Drive BackupEnhanced Color Graphics Video Graphics ControllerPage Contents Page Missing Error Messages and Codes Diagnostics Power-On Self-Test Error Messages Advanced Diagnostics Error Codes Missing Missing Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Advanced Diagnostics Error Codes Memory Error Codes Memory error codes in the following tables are in the format Memory Error Locations on the 32-Bit System Memory Board Addendum 108431-001 11-88 to Manual No Maintenance and Service Guide Extdisk Messages Extdisk Messages Page Contents Page Illustrated Parts Catalog Spare Parts List, U.S Spare Parts LIST, U.S Spare Parts List, U.S Spare Parts List, U.S MS-DOS Version 3.3 Reference Guide Compaq Deskpro 386 Technical Reference Guide Spare Parts List, U.S Spare Parts List, U.S Spare Parts List, International Spare Parts LIST, International System Unit Parts List System Unit Exterior and Battery System Unit System Unit Interior with Memory Options System Unit Maintenance and Service Guide Compaq Enhanced Keyboard Compaq Enhanced Keyboard Missing Missing Compaq Video Graphics Color Monitor Compaq Video Graphics Color Monitor Compaq Video Graphics Monochrome Monitor Compaq Video Graphics Monochrome Monitor 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit Parts List 300-/600-Megabyte Fixed Disk Drive Expansion Unit Parts for Expansion Unit Page Contents Addendum 108431-001 11-88 to Manual No Removal and Replacement Procedures Monitor Compaq Dual-Mode Monitor Installed Compaq Color Monitor Installed Compaq Video Graphics Monochrome Moni- tor Installed Removing the Keyboard Keyboard Removing the Fuse Holder Power Fuse To replace the power fuse, follow these steps Preparing System Unit Cover and Internal Configuration Removing the System Unit Cover Maintenance and Service Guide 11.Location of the Power Supply Assembly Power Supply 12.Removing the Power Supply Screws Removal and Replacement Procedures Battery 16.Location of the Battery Connector 17.Removing the Battery 18.Removing the Security Lock Interior View Security Lock 19.Location of the Reinforcement Bracket Expansion Boards Remove the RF shield Figure Remove the cable cover Figure Maintenance and Service Guide 25.Removing an Expansion Board 11 80287 Coprocessor Memory Expansion Boards Maintenance and Service Guide Memory Chips 28.Removing the Memory Chip To replace a memory chip, follow these steps Speaker Assembly and Security Lock Switch 30.Location of the Speaker/Board Guide Assembly Maintenance and Service Guide 33.Removing the Speaker Assembly Mass Storage Devices Configurations of Mass Storage Devices Expansions Boards 38.Removing a Mass Storage Device from Position a Power Cable Connections for Drive Positions a and D 40.Disconnecting Cables from Mass Storage Device B or C Power Cable Connections for Drive Positions B and C Addendum 108431-001 11-88 to Manual No System Board Addendum 108431-001 11-88 to Manual No Maintenance and Service Guide Addendum 108431-001 11-88 to Manual No Maintenance and Service Guide 46.Removing the System Board Intel 387 Coprocessor 47.Removing the 387 Coprocessor To replace the 387 Coprocessor, follow these steps Keyboard g .2 Monitor Run the Setup program Lost KEY 19 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit Fixed Disk Drive Unit 52.Fixed Disk Drive Retaining Screws 53.Locating and Removing Terminating Resistor 54.Power Supply Screws Power Supply External Interface Adapter Board 57.Removing Power Cables Jumper Positions and Switch Settings Bank 3 Enabled Bank 3 Disabled Compaq Enhanced Color Graphics Board Jumper Settings and Switch Settings System Boards System Board assy. no Switch Settings Compaq Deskpro 386 System Board Version 2 assy. no U13 Even 32-Bit System Memory Board assy. no 32-BIT System Memory Board Jumper Settings for the 32-Bit System Memory Board assy. no 5- to 2-Megabyte 16-Bit Memory Expansion Board assy. no 5- to 2-MEGABYTE 16-BIT Memory Expansion Board Maintenance and Service Guide 5a.1- to 2-Megabyte 32-Bit Memory Expansion Board assy. no Bank 3 Disabled Bank 3 Enabled Esdi Fixed Disk Drive Controller Board assy. no. WD1005WAH Esdi Fixed Disk Drive Controller Board Jumper Jumper Position Function Not installed Reserved Multipurpose Fixed Disk Drive Controller Boards OFF Multipurpose Fixed Disk Drive Controller Board assy. no Maintenance and Service Guide 10.Fixed Disk Drive Controller Board assy. no. WD1002WAH Fixed Disk Drive Controller Board Maintenance and Service Guide 11.Host Adapter Board assy. no Host Adapter Board 13. Switch Settings for the Host Adapter Board 12.COMPAQ Enhanced Color Graphics Boards assy. no Compaq Enhanced Color Graphics Board Maintenance and Service Guide Configuration Switch Bank SW1 Maintenance and Service Guide 16 SW2 Settings for the Compaq Enhanced Color Graphics Board Configuration Switch Bank SW2 Configuration Switch Bank SW3 Video Display Controller Boards Maintenance and Service Guide Jumper Settings and Switch Settings Compaq Video Graphics Controller Board Asynchronous COMMUNICATIONS/PARALLEL Printer Board Maintenance and Service Guide Disable = OFF Maintenance and Service Guide 14 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit 22.ESDI External Fixed Disk Drive Controller Board Page Theory of Operation System Configuration Page Theory of Operation Mass Storage Configuration Maximum Storage System Configuration System Configured for 1.2 Gigabytes Mirroring Duplexing Fdisk Utility Setting UP the External Fixed Disk Drive Expansion Unit Novell Netware Configuration Format Command Do not use Cpqdsk or Nvcpqdsk for non- dedicated servers Maintenance and Service Guide COMPSURF.OBJ Abend Not enough memory for disk FAT tables From the a prompt, enter the following commands Appendix a Fixed Disk Drive see also Mass Storage Devices Tape Adapter Board see Host Adapter Board See Test Selection Menu Maintenance and Service Guide 6Appendix A, Index Maintenance and Service Guide

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