Installing a fan . . . . . . . . . . . . . . . . . . . . . . . . 43
Removing the system-board battery . . . . . . . . . . . . . . . . 43
Installing the system-board battery. . . . . . . . . . . . . . . . . 44
Removing the power supply . . . . . . . . . . . . . . . . . . . 46
Installing the power supply
. . . . . . . . . . . . . . . . . . . 48
Removing and replacing Tier 2 CRUs
. . . . . . . . . . . . . . . . 49
Removing the operator information panel . . . . . . . . . . . . . . 49
Installing the operator information panel. . . . . . . . . . . . . . . 50
Removing the CD or DVD backplane . . . . . . . . . . . . . . . . 51
Installing the CD or DVD backplane . . . . . . . . . . . . . . . . 52
Removing the front hard disk drive cage assembly . . . . . . . . . . . 53
Installing the front hard disk drive cage assembly . . . . . . . . . . . 54
Removing the rear hard disk drive cage assembly . . . . . . . . . . . 55
Installing the rear hard disk drive cage assembly . . . . . . . . . . . 56
Removing the front hard disk drive
. . . . . . . . . . . . . . . . 56
Installing the front hard disk drive . . . . . . . . . . . . . . . . . 57
Removing the rear hard disk drive . . . . . . . . . . . . . . . . . 58
Installing the rear hard disk drive . . . . . . . . . . . . . . . . . 59
Removing and replacing FRUs . . . . . . . . . . . . . . . . . . . 61
Removing a microprocessor . . . . . . . . . . . . . . . . . . . 61
Installing a microprocessor
. . . . . . . . . . . . . . . . . . . 62
Removing the system board . . . . . . . . . . . . . . . . . . . 64
Installing the system board
. . . . . . . . . . . . . . . . . . . 65
Chapter 5. Diagnostics
. . . . . . . . . . . . . . . . . . . . . 67
Diagnostic tools
. . . . . . . . . . . . . . . . . . . . . . . . 67
POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
POST beep codes
. . . . . . . . . . . . . . . . . . . . . . 67
Error logs . . . . . . . . . . . . . . . . . . . . . . . . . . 76
POST error codes . . . . . . . . . . . . . . . . . . . . . . . 77
Checkout procedure . . . . . . . . . . . . . . . . . . . . . . . 83
About the checkout procedure . . . . . . . . . . . . . . . . . . 83
Performing the checkout procedure . . . . . . . . . . . . . . . . 84
Troubleshooting tables . . . . . . . . . . . . . . . . . . . . . . 86
CD or DVD drive problems
. . . . . . . . . . . . . . . . . . . 86
General problems . . . . . . . . . . . . . . . . . . . . . . . 87
Hard disk drive problems . . . . . . . . . . . . . . . . . . . . 88
Intermittent problems. . . . . . . . . . . . . . . . . . . . . . 88
USB keyboard, mouse, or pointing-device problems . . . . . . . . . . 89
Memory problems . . . . . . . . . . . . . . . . . . . . . . . 90
Microprocessor problems . . . . . . . . . . . . . . . . . . . . 91
Monitor or video problems . . . . . . . . . . . . . . . . . . . . 92
Optional-device problems . . . . . . . . . . . . . . . . . . . . 94
Power problems
. . . . . . . . . . . . . . . . . . . . . . . 95
Serial port problems . . . . . . . . . . . . . . . . . . . . . . 96
ServerGuide problems . . . . . . . . . . . . . . . . . . . . . 96
Software problems
. . . . . . . . . . . . . . . . . . . . . . 97
Universal Serial Bus (USB) device problems . . . . . . . . . . . . . 97
System board error LEDs and the light path button
. . . . . . . . . . . 98
Light path button . . . . . . . . . . . . . . . . . . . . . . . 99
Power-supply LEDs . . . . . . . . . . . . . . . . . . . . . . . 99
Diagnostic programs, messages, and error codes
. . . . . . . . . . . 101
Running the diagnostic programs. . . . . . . . . . . . . . . . . 101
Diagnostic text messages
. . . . . . . . . . . . . . . . . . . 102
Viewing the test log. . . . . . . . . . . . . . . . . . . . . . 102
Diagnostic error codes
. . . . . . . . . . . . . . . . . . . . 103
iv
IBM System x3455 Type 7940 and 7941: Problem Determination and Service Guide
Summary of Contents for 7940
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