Memory Problems; Microprocessor Problems - IBM x3250 M2 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, Types 4190, 4191 and 4194 server," on page 31 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, Types 4190, 4191 and 4194 server," on page 31 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 microprocessor is not
working correctly.
Action
1. Make sure that:
v No error LEDs are lit on the operator information panel.
v The memory modules are seated correctly.
v You have installed the correct type of memory.
v All banks of memory are enabled. The server might have automatically
disabled a memory bank when it detected a problem.
2. Check the system event/error log for error message 289; if a DIMM was
disabled by a systems-management interrupt (SMI), replace the DIMM.
3. Run memory diagnostics (see "Diagnostic programs and messages" on page
128).
4. Add one pair of DIMMs at a time, making sure that the DIMMs in each pair
match.
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
Action
1. Correct any errors that are indicated by the LEDs (see "System-board LEDs"
on page 126).
2. Make sure that the server supports the microprocessor.
3. (Trained service technician only) Make sure that the microprocessor is seated
correctly.
4. (Trained service technician only) Replace the microprocessor.
5. (Trained service technician only) Replace the system board.
119
Chapter 5. Diagnostics