IBM eServer 342 xSeries Installation Manual page 48

Device
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 memory
displayed is less than the
amount of memory installed.
Microprocessor problems The startup (boot) microprocessor is not working properly.
The server emits a
continuous tone during
POST.
Table 4. Troubleshooting charts.
36
IBM xSeries 342: Installation Guide
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 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.
If the items above are correct, call for service.
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.
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.
Verify that:
1. The memory modules are seated properly.
2. Each pair of DIMMs are the same size (DIMM 1 and DIMM 4 must match and DIMM
2 and DIMM 3 must match. The two pairs do not need to match each other.).
3. You have installed the correct type of memory.
4. If you changed the memory, you updated the memory configuration using the
Configuration/Setup Utility program.
5. All banks of memory on the DIMMs are enabled. The server might have detected a
problem and automatically disabled a DIMM bank, or a DIMM bank could have been
manually disabled.
If the above items are correct, run the memory-diagnostic program. The system might
have detected a bad memory module and automatically reallocated memory to enable
you to continue to operate. If the memory tests fail, call for service or replace the failing
DIMM.
Verify that the startup microprocessor is seated properly. If it is, call for service.
Suggested action