Technical information

Symptom Charts / Start Up -

Troubleshooting

PowerBook (FireWire)

Symptom Charts

Start Up

RAM failure occurs

(beeps are heard at

start up)

Note:

There is no RAM on the microprocessor board itself, so the

computer will beep if no memory is installed in at least one of the

slots.

1. Remove top RAM SO-DIMM (if present) and restart computer.

If startup sequence is normal, replace RAM SO-DIMM and

retest. Note: Verify RAM is PC-100 compatible.

2. Replace bottom RAM SO-DIMM and retest.

3. Replace microprocessor board.

4. Replace I/O logic board.

Power

Computer won’t

power up

1. Restart computer by pressing the reset button on the back of

the unit. Wait five seconds and press the Power key.

2. Try known-good power adapter.

3. Try known-good, firmly seated, charged battery. Repeat.

4. Connect power adapter and restart computer in 3-4 minutes.

5. Disconnect internal keyboard completely and try powering up

unit. If unit powers up, replace keyboard.

6. Verify microprocessor card is firmly seated.

7. Replace sound card.

8. Replace power supply card.

9. Replace microprocessor board.

10. Replace I/O logic board.