IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual page 207

Symptom
System hangs during fixed disk
diagnostic.
Intermittent problems
A problem occurs only
occasionally and is difficult to
detect.
Keyboard, mouse, or
pointing-device problems.
All or some keys on the
keyboard do not work.
The mouse or pointing device
does not work.
Memory problems
The amount of system memory
displayed is less than the
amount of physical memory
installed.
Microprocessor problems
The server indicates a
microprocessor error during
POST.
The server does not recognize
all installed processors (loose
connection; bent pin(s) on
processor(s))
Monitor problems
Testing the monitor.
The screen is blank.
Suggested action
Remove hard drive being tested at the time of the hang and rerun the
diagnostic. If successful, replace drive that was removed.
Make sure that:
1. All cables and cords are connected securely to the rear of the server and
attached options.
2. When the server is turned on, air is flowing from the rear of the server at the
fan grill. If there is no air flow, the fan is not working. This causes the server to
overheat and shut down.
3. Ensure that the SCSI bus and devices are configured correctly and that the last
external device in each SCSI chain is terminated correctly.
1. Make sure that the keyboard cable is properly connected to the server.
2. Make sure that the server and the monitor are turned on.
3. Try using another keyboard.
1. Make sure that the mouse or pointing-device cable is securely connected
and the device drivers are installed correctly.
2. Try using another mouse or pointing device.
Make sure that:
1. DIMMs are seated properly.
2. You have installed the correct type of memory.
3. If you changed the memory, you updated the memory configuration with the
Configuration/Setup Utility program.
4. All banks of memory on the DIMMs are enabled. The server might have
automatically disabled a DIMM bank when it detected a problem, or a DIMM
bank could have been manually disabled.
Look in the POST error log for error message 289:
v If the DIMM was disabled by the user or by SAL/EFI:
1. Start the Configuration/Setup Utility program.
2. Enable the DIMM.
3. Save the configuration and restart the server.
v If you continue to get this error, replace the DIMM.
The startup (boot) microprocessor is not working properly.
Verify that all microprocessors are seated properly. If they are, replace the failed
microprocessors.
1. Reseat microprocessors and power modules.
2. Check for bent pins on microprocessors.
3. Check cable connections from processor board to power modules.
Some IBM monitors have their own self-tests. If you suspect a problem with
your monitor, see the information that comes with the monitor for adjusting
and testing instructions.
1. Monitor.
2. Run the AMIDiag program. If diagnostics pass, the problem might be a video
driver.
3. I/O board.
Make sure that:
1. The server power cord is plugged into the server and a working electrical
outlet.
2. The monitor cables are connected properly.
3. The monitor is turned on and the brightness and contrast controls are adjusted
correctly.
Chapter 6. Symptom-to-FRU index
197