Undetermined Problems - IBM THINKCENTER 8128 Hardware Maintenance Manual

Undetermined problems

1. Power-off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you isolate the failing device or adapter.
5. Check the power supply voltages (see "Power supply connectors" on page 110).
6. Replace the system board (see "Replacing the system board (all machine
a. Non-IBM devices
b. External devices (modem, printer, or mouse)
c. Any adapters
d. Riser card
e. Memory modules
f. Extended video memory
g. External Cache
h. External Cache RAM
i. Hard disk drive
j. Diskette drive
If all devices and adapters have been removed, and the problem persists,
continue to the next step.
If the voltages are within tolerance, continue with the next step. If the voltages
are not within tolerance, replace the power supply.
types)" on page 61).
Chapter 7. Symptom-to-FRU Index
109