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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 the Hardware Maintenance Manual to determine which components are customer replaceable units (CRUs)
and which components are field replaceable units (FRUs).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
Multiple rows of DIMMs in a
branch are identified as failing.
Microprocessor problems
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See the Hardware Maintenance Manual to determine which components are customer replaceable units (CRUs)
and which components are field replaceable units (FRUs).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
A microprocessor LED is lit
during POST, indicating that
the microprocessor is not
working correctly.
Action
1. Reseat the DIMMs; then, restart the server.
2. Replace the failing DIMM.
3. (Trained service technician only) Replace the system board.
Action
1. Make sure that the server supports the microprocessor.
2. (Trained service technician only) Make sure that the microprocessor is seated
correctly.
3. (Trained the service technician only) Reseat the microprocessor.
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. (Trained service technician only) Microprocessor
b. (Trained service technician only) System board
Chapter 8. Solving problems
129
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