PowerBook 150 Does Not Start Up

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By Mark Hansen

When you press the power button on your PowerBook 150 you may find that it either does not start up or that it flashes the display momentarily and goes blank. There are a couple of things that you need to try. Follow these procedures:

Plug in the AC Adapter

If the unit starts with the AC Adapter connected, but not with the battery inserted, you need to charge the battery. If, after charging the battery, the same symptom appears, you may need to reset the power manager or replace the battery.

Reset the Power Management Circuitry

To do this, follow these steps:

Step 1: Remove the power adapter and battery from the unit.
Step 2: Push the Reset button in the back of the unit with a paper clip and hold for 5 to 10 seconds.
Step 3: Attach the power adapter and push the Reset button in back again, but just briefly. You should hear a small pop from the speaker; do not be concerned.
Step 4: Push the main power button in back (large exposed button). The unit should power up.
Step 5: Charge the battery for at least 8 hours before attempting to run on battery power.

If the PowerBook powers on, the battery may be reinserted. If it fails to start, the PowerBook probably needs service.

If the machine does not start with a recharged or new battery, or does not start with the AC Adapter alone (with the battery removed), your PowerBook may need servicing. For help in obtaining service, please call 1-800-SOS-APPL or see your local Apple Authorized Service Provider.

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