Personal Computer Hardware Maintenance Manual

Message/Symptom FRU/Action
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 first
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. Any adapter cards
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 and the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or adapter cards.
If
all devices and adapter cards have been removed, and the problem continues,
replace the system board. See “Replacing the system board” on page 96.
Chapter 7. Symptom-to-FRU index 77