Compaq AP400 Maintenance And Service Manual page 4

iv
Removal and Replacement Procedures continued
System Board Assembly.........................................................................................................3-34
System Board With Tray Components ............................................................................3-34
System Board With Tray Removal and Replacement......................................................3-36
Installing SCSI Devices..........................................................................................................3-38
Guidelines for Optimizing Performance..........................................................................3-39
SCSI Cables.....................................................................................................................3-39
Installing a Wide Ultra2 SCSI Controller........................................................................3-40
DIMMs ...................................................................................................................................3-41
Important Guidelines for DIMM Installation ..................................................................3-42
DIMM Installation...........................................................................................................3-43
Processor and Heatsink...........................................................................................................3-44
Processor Power Module .................................................................................................3-45
Upgrading the Processor..................................................................................................3-46
Installing the Primary Processor Power Module Cable Insulator ....................................3-46
External Battery......................................................................................................................3-48
Power Switch and LED with Cables.......................................................................................3-50
Power Supply..........................................................................................................................3-50
Base Pan Cover.......................................................................................................................3-52
Base Pan Assembly ................................................................................................................3-53
Chapter 4
Diagnostic Tools
Power-On Self-Test (POST).....................................................................................................4-1
POST Messages........................................................................................................................4-2
Troubleshooting Minor Problems .............................................................................................4-5
Power Problems.................................................................................................................4-6
Printer Problems ................................................................................................................4-6
Diskette Drive Problems....................................................................................................4-7
Display Problems ..............................................................................................................4-8
Hardware Installation Problems ........................................................................................4-9
Hard Drive Problems.......................................................................................................4-10
CD-ROM and DVD-ROM Drive (IDE) Problems ..........................................................4-11
Memory Problems ...........................................................................................................4-11
SCSI Problems ................................................................................................................4-12
Network Problems...........................................................................................................4-12
Audio Hardware Conflicts...............................................................................................4-13
Compaq Setup and Diagnostics Utilities.................................................................................4-14
Accessing the Compaq Setup and Diagnostics Utilities Menu ........................................4-14
Diagnostic Error Codes...........................................................................................................4-18
Memory ...........................................................................................................................4-19
Keyboard .........................................................................................................................4-19
Microprocessor................................................................................................................4-20
Printer..............................................................................................................................4-21
Diskette Drive .................................................................................................................4-21
Serial Port........................................................................................................................4-22
Modem ............................................................................................................................4-22
Pointing Device ...............................................................................................................4-22
CD-ROM or DVD-ROM Drive (IDE) ............................................................................4-23
Tape Drive.......................................................................................................................4-23
Audio...............................................................................................................................4-23
Video ...............................................................................................................................4-24
Network Interface............................................................................................................4-25