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102 IBM® xSeries 220 User’s Reference
Intermittent problems Verify 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 airflow, 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.
If the items above are correct, call for service.
A problem occurs only
occasionally and is difficult to
detect.
Keyboard, mouse, or pointing-
device problems
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.
If the items above are correct, call for service.
All or some keys on the
keyboard do not work.
The mouse or pointing device
does not work.
1. Verify 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.
If the problem remains, call for service.
Memory problems Verify that:
1. The memory modules 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:
• If the DIMM was disabled by a system-management interrupt (SMI), replace
the DIMM.
• If the DIMM was disabled by the user or by POST:
1. Start the Configuration/Setup Utility program.
2. Enable the DIMM.
3. Save the configuration and restart the server.
• If you continue to get this error, replace the DIMM.
If the problem persists, call for service.
The amount of memory
displayed is less than the
amount of memory installed.
Microprocessor problems The startup (boot) microprocessor is not working properly.
Verify that the startup microprocessor is seated properly. If it is, replace the startup
microprocessor.
If the problem remains, call for service.
The server emits a continuous
tone during POST.
Device Suggested action
Table 16. Troubleshooting charts