IBM IntelliStation M Pro 6218, Problem Determination And Service Manual

Page: 47 / 168

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,” on page 65 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
displayed is less than the
amount of installed physical
memory.
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 computer might have automatically
disabled a memory bank when it detected a problem, or a memory bank
might have been manually disabled.
2. Check the POST error 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, run the
Configuration/Setup Utility program and enable the DIMM. Save the settings
and restart the computer.
3. Replace the following components one at a time, in the order shown, restarting
the computer each time:
a. DIMM
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 Chapter 3, “Parts listing,” on page 65 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 computer emits a
continuous beep during POST,
indicating that the startup (boot)
microprocessor is not working
correctly.
1. (Trained service technician only) Reseat the microprocessor.
2. (Trained service technician only) Replace the microprocessor.
Monitor or video problems
Some IBM monitors have their own self-tests. If you suspect a problem with your
monitor, see the documentation that comes with the monitor for instructions for
testing and adjusting the monitor.
Chapter 2. Diagnostics
31