IBM System x3800 Problem Determination And Service Manual page 97

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, System x3800 Type 8866," on page 107 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
System-error log message
5V Aux Power Good Fault
5V Power Good Fault
12V A Bus Fault
12V B Bus Fault
12V C Bus Fault
12V D Bus Fault
Action
1. Reseat the I/O board.
2. Disconnect the cable that connects the operator information
panel to the I/O board.
3. Replace the I/O board.
4. (Trained service technician only) Replace the PCI board.
Disconnect the monitor and all USB devices from the server; then:
1. Reseat the I/O board.
2. Reseat the microprocessor tray.
3. (Trained service technician only) Replace the PCI board.
1. Reseat the microprocessor tray.
2. (Trained service technician only) Replace the PCI board.
3. (Trained service technician only) Replace the power backplane.
1. Reseat the following components:
a. Disk drives
b. SAS hard disk drive backplane cables
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Disk drives
b. SAS hard disk drive backplane
c. (Trained service technician only) Power backplane
d. (Trained service technician only) PCI board
1. Reseat the following components:
a. Adapters
b. Microprocessor tray
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Adapters
b. (Trained service technician only) PCI board
c. (Trained service technician only) Power backplane
1. Reseat the following components:
a. Memory cards 3 and 4
b. Microprocessor tray
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Memory cards 3 and 4
b. (Trained service technician only) Power backplane
c. (Trained service technician only) Microprocessor tray
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Chapter 2. Diagnostics