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 x3500 Type 7977,” on page 41 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 Action
12V C Bus Fault
1. Reseat the adapters.
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-X board
c. (Trained service technician only) Power backplane
d. (Trained service technician only) System board
12V D Bus Fault
1. Reseat the DIMMs.
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. DIMMs
b. (Trained service technician only) Power backplane
c. (Trained service technician only) System board
12V E Bus Fault
1. Reseat the DIMMs.
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. DIMMs
b. (Trained service technician only) Power backplane
c. (Trained service technician only) System board
12V Planar Fault
1. (Trained service technician only) Replace the power backplane
cable.
2. (Trained service technician only) Replace the system board
12V Power Good Fault
1. Reseat the DIMMs.
2. (Trained service technician only) Replace the power-supply
docking cable (see “Power-supply docking cable” on page 73).
3. (Trained service technician only) Replace the system board.
Application Posted Alert to ASM Information only
Backplane Power Good Fault
1. Reseat the DIMMs.
2. (Trained service technician only) Replace the power-supply
docking cable (see “Power-supply docking cable” on page 73).
3. (Trained service technician only) Replace the system board.
Board 2.5V Power Good Fault (Trained service technician only) Replace the system board
Calgary Core 1.5V Power Good Fault (Trained service technician only) Replace the system board.
CEC Card Power Good Fault (Trained service technician only) Replace the PCI-X board.
CPU %d IERR detected, the system has been
restarted
Information only; if the message remains:
1. (Trained service technician only) Reseat the microprocessors.
2. Reseat the microprocessor VRMs, if any are present.
3. (Trained service technician only) Replace the microprocessor.
Chapter 5. Diagnostics 153
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