Memory Problems - Lenovo ThinkServer TS100 Hardware Maintenance Manual

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 Chapter 3, "Parts listing, ThinkServer TS100 Machine Types 6431, 6432, 6433, and 6434," on page 37
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
The amount of system memory
that is displayed is less than the
amount of installed physical
memory.
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ThinkServer TS100 Types 6431, 6432, 6433, and 6434: Hardware Maintenance Manual
Action
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 135). Otherwise, continue to step 3.
3. Run memory diagnostics (see "Running the diagnostic programs" on page 164).
4. Make sure that there is no memory mismatch when the server contains more
than the minimum memory configuration (one 512 MB 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
configuration).
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