6Contents
Riser Card . . . . . . . . . . . . . . . . . . . . . . . . 79
Removing the Riser Card . . . . . . . . . . . . . . 79
Installing the Riser Card . . . . . . . . . . . . . . 80
System Memory . . . . . . . . . . . . . . . . . . . . . 81
Memory Module Installation Guidelines . . . . . . 81
Installing Memory Modules . . . . . . . . . . . . 82
Removing Memory Modules . . . . . . . . . . . . 84
Processor . . . . . . . . . . . . . . . . . . . . . . . . 85
Replacing the Processor . . . . . . . . . . . . . . 85
Control Panel Assembly (Service-Only
Procedure) . . . . . . . . . . . . . . . . . . . . . . . . 89
Removing the Control Panel Assembly. . . . . . . 89
Installing the Control Panel Assembly . . . . . . . 90
System Board (Service-Only Procedure) . . . . . . . . 91
Removing the System Board Assembly . . . . . . 91
Installing the System Board Assembly. . . . . . . 94
4 Troubleshooting Your System . . . . . . . . . 97
Safety First—For You and Your System . . . . . . . . . 97
Start-Up Routine . . . . . . . . . . . . . . . . . . . . . 97
Checking the Equipment. . . . . . . . . . . . . . . . . 98
Troubleshooting IRQ Assignment Conflicts . . . . 98
Troubleshooting External Connections. . . . . . . 99
Troubleshooting the Video Subsystem. . . . . . . 99
Troubleshooting the Keyboard . . . . . . . . . . . 100
Troubleshooting the Mouse . . . . . . . . . . . . 101
Troubleshooting Basic I/O Functions. . . . . . . . 101
Troubleshooting a Serial I/O Device . . . . . . . . 102
book.book Page 6 Thursday, August 30, 2007 3:30 PM