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Message/Symptom FRU/Action
"Insert a Diskette" icon appears with a known-good
diagnostics diskette in the rst 3.5-inch diskette drive.
1. System Board
2. Diskette Drive Cable
3. Network Adapter
Intensity or color varies from left to right of characters
and color bars
1. Display
2. Video adapter (if present)
3. System Board
No power or fan not running
1. See “Power problems” on page 31.
Non-system disk or disk error-type message with a
known-good diagnostic diskette.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
Other display symptoms not listed above (including blank
or illegible display)
1. Display
2. System Board
Power-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 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
1. Turn off the computer.
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
e. External Cache
f. External Cache RAM
g. Hard disk drive
h. Diskette drive
3. Turn on the power to re-test the system.
62 Hardware Maintenance Manual