IBM 7943, Problem Determination And Service Manual

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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 4, “Parts listing, System x3655, Type 7985 and 7943,” on page 93 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 event/error log message Action
CPU n non-recoverable over temperature fault
1. Make sure that the fans are operating, that there are no
obstructions to the airflow, that the air baffles are in place and
correctly installed, and that the server cover is installed and
completely closed.
2. Make sure that the heat sink for microprocessor n is installed
correctly.
3. (Trained service technician only) Replace microprocessor n .
4. (Trained service technician only) Replace the system board.
VRD 1 critical over voltage fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace microprocessor 1.
3. (Trained service technician only) Replace the system board.
VRD 1 critical under voltage fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace microprocessor 1.
3. (Trained service technician only) Replace the system board.
VRD 2 critical over voltage fault
VRD 2 = VRM
1. (Trained service technician only) Reseat microprocessor 2.
2. (Trained service technician only) Replace microprocessor 2.
3. (Trained service technician only) Replace the system board.
VRD 2 critical under voltage fault
VRD 2 = VRM
1. (Trained service technician only) Reseat microprocessor 2.
2. (Trained service technician only) Replace microprocessor 2.
3. (Trained service technician only) Replace the system board.
Processor VTT power fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace microprocessor 1.
3. (Trained service technician only) Replace the system board.
IPMI BMC system-error log messages
The following table describes the possible IPMI BMC system-event log messages
and suggested actions to correct the detected problems.
Chapter 3. Diagnostics
75