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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 parts listing in the Hardware Maintenance Manual 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.
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 front-panel assembly or on the system board.
v The memory modules are seated correctly.
v You have installed the correct type of memory.
v If you changed the memory, you updated the memory configuration in the
Configuration/Setup Utility program.
v All DIMMs are enabled. The server might have automatically disabled a
DIMM when it detected a problem.
v If a DIMM was disabled by a system-management interrupt (SMI), replace
the DIMM.
2.
Check the POST error log for error message 289. If POST error message 289 is
in the error log, perform the actions listed in the POST error codes table (see
“POST error codes” on page 52). Otherwise, continue to step 3.
3. Run memory diagnostics (see “Running the diagnostic programs” in the
Hardware Maintenance Manual).
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 (see the User Guide on the ThinkServer
Documentation DVD for information about the supported DIMM
configurations).
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
Chapter 5. Solving problems 67