Lenovo ThinkServer TD100x - Manual (Page 93)

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 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 error log for error message 289.
If a DIMM was disabled by a system-management interrupt (SMI), replace the
DIMM.
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 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 installing memory modules).
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
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 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
A microprocessor LED is lit
during POST, indicating that the
startup (boot) microprocessor is
not working correctly.
1. Make sure that the server supports the microprocessor.
2. (Trained service technician only) Reseat the microprocessor.
3. 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 5. Solving problems 77