IBM 88643RU - System x3850 - 8864 Service Manual page 148

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, Type 8864," on page 23 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
3.3V Power Good Fault
5V Aux Power Good Fault
5V Power Good Fault
12V A Bus Fault
12V B Bus Fault
12V C Bus Fault
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IBM System x3850 Type 8864: Problem Determination and Service Guide
Action
1. Reseat the Remote Supervisor Adapter II SlimLine, if present.
2. Reseat the I/O board.
3. (Trained service technician only) Replace the PCI board.
1. Reseat the I/O board.
2. (Trained service technician only) Disconnect the cable
connecting 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. Replace the PCI board.
3. 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. PCI adapters
b. Microprocessor tray
2. Replace the following components one at a time, in the order
shown, restarting the server each time.
a. PCI adapters
b. (Trained service technician only) PCI board
c. (Trained service technician only) Power backplane