PowerTroubleshooting
PowerBook (FireWire)
9
After you remove battery and power adapter, some
control panel settings are different
1. Connect power adapter to unit for 24 hours to see if
backup battery is just depleted. (It takes approximately
48 hours to fully charge the backup battery.)
2. Check backup battery cable and connections.
3. Replace backup battery.
4. Replace I/O logic board.
Power adapter is plugged in, but Control Strip
doesn’t indicate adapter is connected
1. Verify that power adapter is connected correctly and the
power cord is plugged solidly in the adapter.
2. Verify that there is power at the outlet.
3. Try known-good power adapter.
4. Try known-good power cord.
5. Reset power manager (press the reset button behind the
I/O door.
6. Replace sound card.
7. Replace power supply card.
8. Replace I/O logic board.
Computer runs when plugged into wall outlet but
not on battery power
1. Verify the 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 power on key.
6. Try known-good power adapter.
7. Replace power supply card.
8. Replace I/O logic board.
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