
ServeRAID-8i adapter .....................44
Top cover and bezel ......................45
Removing and replacing Tier 2CRUs ................46
Battery ...........................46
I/O board ..........................47
Operator information panel assembly................49
PCI-X adapter guide ......................50
Power-supply structure .....................51
SAS backplane ........................52
Removing and replacing FRUs ...................53
Front-panel assembly .....................53
Microprocessor tray and microprocessor ..............54
PCI-X board assembly .....................59
PCI-X switch card assembly ...................60
Power backplane .......................61
Scalability cartridge assembly ..................63
Chapter 5. Diagnostics .....................65
Diagnostic tools ........................65
POST ............................65
POST beep codes ......................66
Error logs ..........................71
POST error codes.......................73
Checkout procedure .......................87
About the checkout procedure ..................87
Performing the checkout procedure ................88
Checkpoint codes (trained service technicians only) ...........88
Troubleshooting tables ......................89
CD or DVD drive problems ...................89
General problems .......................90
Hard disk drive problems ....................90
Intermittent problems......................91
Keyboard, mouse, or pointing-device problems ............91
USB keyboard, mouse, or pointing-device problems ..........92
Memory problems .......................94
Microprocessor problems ....................95
Monitor problems .......................96
Optional-device problems ....................98
Power problems .......................99
Serial port problems ..................... 100
ServerGuide problems..................... 101
Software problems ...................... 101
Universal Serial Bus (USB) port problems ............. 102
Video problems ....................... 102
Light path diagnostics ...................... 102
Remind button ....................... 104
Light path diagnostic LEDs ................... 105
Power-supply LEDs .......................110
Diagnostic programs, messages, and error codes............112
Running the diagnostic programs .................112
Diagnostic text messages ...................113
Viewing the test log ......................113
Diagnostic error codes.....................113
Real Time Diagnostics...................... 130
Recovering from aBIOS update failure ............... 130
System-error log messages .................... 132
iv IBM System x3950 Type 8878 and System x3950 EType 8879: Problem Determination and Service Guide