Memory Problems; Microprocessor Problems - IBM BladeCenter HS20 7981 Problem Determination And 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 7981," 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
that is displayed is less than the
amount of installed physical
memory.

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 7981," 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 blade server emits a
continuous beep during POST,
indicating that the startup (boot)
microprocessor is not working
correctly.
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BladeCenter HS20 Type 7981: Problem Determination and Service Guide
Action
1. Make sure that:
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 banks of memory are enabled. The blade server might have automatically
disabled a memory bank when it detected a problem, or a memory bank
might have been manually disabled.
2. Check BMC log for error message 289:
v If a DIMM was disabled by a system-management interrupt (SMI), replace
the DIMM.
v If a DIMM was disabled by the user or by POST, run the Configuration/Setup
Utility program and enable the DIMM.
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.