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Symptom FRU/Action
Other display symptoms not listed above (including blank
or illegible display)
1. Display
2. System board
Turn on indicator or hard disk drive in-use light not on, but
computer works correctly
1. Power switch/LED assembly
2. System board
Printer problems 1. Printer
2. System board
Program loads from the hard disk with a known-good
diagnostics diskette in the rst 3.5-inch diskette drive
1. Run the Setup Utility program and check startup
sequence.
2. Check the diskette drive.
3. Check the diskette drive cable.
4. Check the system board.
5. Check the power supply.
RPL computer cannot access programs from its own hard
disk drive.
1. If the network administrator is using the LCCM Hybrid
RPL, check startup sequence:
a. First device - Network
b. Second device - Hard disk drive
2. Check the hard disk drive.
RPL computer does not RPL from server
1. Check the startup sequence.
2. Check the network adapter LED status.
Serial or parallel port device failure (system board port)
1. Run an external device self-test.
2. Check the external device.
3. Check the cable.
4. Check the system board.
Serial or parallel port device failure (adapter port)
1. Run an external device self-test.
2. Check the external device.
3. Check the cable.
4. Check the alternate adapter.
5. Check the system board.
Some or all keys on the keyboard do not work
1. Keyboard
2. Keyboard cable
3. System board
Undetermined problems
This topic provides instructions on how to nd out the failing components.
To nd out the failing components, do the following:
1. Turn off the server.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapters
c. Memory modules
d. Extended video memory
Chapter 3. Diagnostics and troubleshooting 21