Technical information

Symptom Charts / Power -
9
Troubleshooting
PowerBook (FireWire)
Computer functions
when plugged into
wall outlet but not on
battery power
1. Verify battery is charged by pressing the level indicator
button on the battery. If the battery is charged, one or more
status lights on the battery will glow.
2. Reseat battery to make sure battery is mating with contacts on
I/O logic board.
3. Try battery in opposite expansion bay.
4. Try known-good, firmly seated, charged battery. Try the same
battery in opposite expansion bay.
5. Turn off the computer. Press the reset button on the back of
the unit, wait five seconds, then press the Power key.
6. Try known-good power adapter.
7. Replace power supply card.
8. Replace I/O logic board.
Battery won’t charge 1. Verify battery is charged by pressing the level indicator
button on the battery. If the battery is charged, one or more
status lights on the battery will glow.
2. Turn off the computer. Press the reset button on the back of
the unit, wait five seconds, and press the Power key.
3. Try battery in opposite expansion bay.
4. Try known-good, firmly seated, charged battery. Try the same
battery in opposite expansion bay.
5. Replace power supply card.
6. Replace I/O logic board.
Battery will not
charge unless unit is
in sleep mode or shut
down
Verify the appropriate power adapter is being used.