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Message/Symptom FRU/Action
Program loads from the hard disk with a known-good
diagnostics diskette in the rst 3.5-inch diskette drive
1. Run setup and check startup sequence.
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. AC/DC power adapter
PXE computer cannot access programs from its own hard
disk.
Replace the hard disk drive
PXE computer does not PXE from server
1. Check startup sequence
2. Check the network adapter LED status
Some or all keys on the keyboard do not work
1. Keyboard
2. Keyboard Cable
3. System Board
Undetermined problems
If you encounter undetermined problems, do the following:
1. Turn off the computer and the power.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Memory modules
c. Extended video memory
d. External Cache
e. External Cache RAM
f. Hard disk drive
3. Turn on the power and the computer to re-test the system.
4. Repeat steps 1 through 3 until you nd the failing device or adapter cards.
If all devices have been removed, and the problem continues, replace the system board. See “Replacing
the system board” on page 82.
64 Hardware Maintenance Manual