User Guide

Symptom Charts / Sound -

Troubleshooting

PowerBook (FireWire)

Sound

No sound from

speaker(s)

1. Verify mute mode is not enabled (F6 on the keyboard).

2. Check the volume setting in the Sound control panel.

3. Verify no external speakers or headphones are plugged in.

4. Reset PRAM.

5. Make sure speaker cable is plugged into sound card.

6. Replace sound card.

7. Replace speakers (part of the top case).

8. Replace I/O logic board

Startup sound is

heard, then no sound

from speaker(s)

1. Remove sound preferences from System Folder, reset PRAM,

then restart.

2. Perform clean installation of system software.

Hard Drive

Internal hard drive

does not spin

1. Make sure power adapter is connected.

2. Disconnect external devices.

3. Check hard drive connection.

4. Replace hard drive cable.

Note:

Pull up evenly on the cable to

avoid bending pins.

5. Replace hard drive.

6. Replace I/O logic board.

Expansion bay module

will not insert

properly in the

expansion bay

1. Check for obstructions in the expansion bay.

2. Check that the far right keyboard tab is inserted properly and

not extending into the expansion bay.

3. Try another module.

4. Replace I/O logic board.