Power

Computer won't power up

1 If sleep LED is continually on, backup battery power has been interrupted. Restart computer by holding down Shift-FN-Control and power on key. Wait 5 seconds and press power on key. If computer doesn't restart, repeat 3-4 times.

2 Try known-good power adapter.

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

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

5 Verify PMU cable is fully seated on I/O logic board.

6 Disconnect internal keyboard and try powering up unit. If unit powers up, replace keyboard.

7 Verify that microprocessor card is seated firmly in connector.

8 Replace sound card.

9 Replace power supply card.

1 0 Replace PMU card.

1 1 Replace I/O logic board.

1 2 Replace microprocessor board.

Screen is blank; backlight isn't on; computer doesn't respond

If sleep LED is continually on, backup battery power has been interrupted. Restart computer by holding down Shift-FN-Control and power on key. Wait 5 seconds and press power on key. If computer doesn't restart, repeat 3-4 times. Restart computer.

Disconnect power adapter, remove battery, and restart computer in 3-4 minutes. Check power adapter cable. Try known-good, charged battery. Try known-good power adapter. Disconnect backup battery for 2 minutes. Check all I/O logic board cables and connections. Replace sound card. Replace microprocessor board. Replace power supply card. 1 2 Replace PMU card. 1 3 Replace I/O logic board.

10 11

After you remove battery, 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 PMU card.

5 Replace cable from PMU to I/O logic board.

6 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 Replace sound card.

5 Replace PMU card.

6 Replace PMU cable.

7 Replace I/O logic board.

Computer runs when plugged into wall outlet but not on battery power

1 Reset power manager (shift-Fn-Ctrl-Pwr button).

2 Check battery shims (refer to Additional Procedures chapter.)

3 Reseat battery to make sure battery is mating with contacts on I/O logic board.

4 Try battery in opposite expansion bay.

5 Try known-good, firmly seated, charged battery. Repeat once.

6 Try known-good power adapter.

7 Replace charge card.

8 Replace PMU board.

9 Replace power supply card. 1 0 Replace I/O logic board.

Premature low-power warning appears

1 Try known-good, charged battery.

2 Try known-good power adapter.

3 Replace sound card.

4 Replace PMU board

5 Replace PMU cable.

6 Replace power supply card.

7 Replace I/O logic board.

Battery won't charge 1 Reset power manager (shift-Fn-Ctrl-Pwr button).

2 Try battery in opposite expansion bay.

3 Verify EMI shield has no contact with outer shield of the power adapter (refer to Additional Procedures, "Right I/O Wall EMI Shield").

Caution: When reinstalling the top case, ensure the EMI shield will not make contact with the outer shield of the AC power adapter. Otherwise when the power adapter is plugged in, the unit will not charge the battery during use.

4 Try known-good battery. Repeat once.

5 Replace charge card.

6 Replace PMU board.

7 Replace power supply card.

8 Replace I/O logic board.

Battery will not charge unless unit is in sleep mode or shut down

1 Ensure power adapter connected.

2 Verify EMI shield has no contact with outer shield of the power adapter (refer to Additional Procedures, "Right I/O Wall EMI Shield").

Caution: When reinstalling the top case, ensure the EMI shield will not make contact with the outer shield of the AC power adapter. Otherwise when the power adapter is plugged in, the unit will not charge the battery during use.

3 Try known-good battery. Repeat once.

4 Replace charge card.

5 Replace PMU board.

6 Replace power supply card.

7 Replace I/O logic board.

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