Memory Problems; Microprocessor Problems - IBM LS20 - BladeCenter - 8850 Service 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, Type 8850," on page 53 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
displayed is less than the
amount of physical memory
installed.

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 Chapter 3, "Parts listing, Type 8850," on page 53 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 server emits a continuous
beep during POST, indicating
that the startup (boot)
microprocessor is not working
correctly.
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AMD Opteron LS20 Type 8850 for IBM BladeCenter: Problem Determination and Service Guide
Action
1. Make sure that:
v The memory modules are seated properly.
v You have installed the correct type of memory.
v If you changed the memory, you updated the memory configuration with the
Configuration/Setup Utility program.
v All banks of memory on the DIMMs are enabled. The blade server might
have automatically disabled a DIMM bank when it detected a problem or a
DIMM bank could have been manually disabled.
2. Check BMC log for error message 289:
v If the DIMM was disabled by a system-management interrupt (SMI), replace
the DIMM.
v If the DIMM was disabled by the user or by POST:
a. Start the Configuration/Setup Utility program.
b. Enable the DIMM.
c. Save the configuration and restart the computer.
3. Reseat the DIMM.
4. Replace the DIMM.
5. (Trained service technician only) Replace the system board assembly.
Action
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace microprocessor 1.