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Memory 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 Action
The amount of system memory
that is displayed is less than the
amount of installed physical
memory.
1. Make sure that:
v No error LEDs are lit on the control-panel assembly or on the system board.
v Memory mirroring does not account for the discrepancy.
v The memory modules are seated correctly.
v You have installed the correct type of memory.
v All DIMMs are enabled. The server might have automatically disabled a
DIMM when it detected a problem.
2. Check the POST event log for error message 289:
v If a DIMM was disabled by a systems-management interrupt (SMI), replace
the DIMM.
3. Run memory diagnostics.
4. Make sure that there is no memory mismatch when the server is over the
minimum memory configuration (one 1 GB DIMM) and that you have installed
the correct number of DIMMs.
5. Reseat the DIMMs.
6. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. (Trained service technician only) System board
Multiple rows of DIMMs in a
branch are identified as failing.
1. Reseat the DIMMs; then, restart the server.
2. Replace the failing DIMM.
3. (Trained service technician only) Replace the system board.
Chapter 7. Troubleshooting 167