Specifications

PowerBook G4 (12" 1.5 GHz) Troubleshooting -

Startup Symptom Charts

Startup

The computer will not power on

1. Make sure that power adapter connector is fully inserted.

2. Remove any connected peripherals.

3. Try known-good power outlet.

4. Try known-good power adapter and power cord.

5. Remove battery.

6. Press Caps Lock key to see if light on key comes on. If it does, hold power button

down for six seconds to shut down the computer and restart.

7. Reset the power manager by pressing the key combination Control-Option-Shift-

power.

Warning: Make sure you do not hold down the "fn" key when resetting the

power manager.

Warning: Resetting the power manager means you will also need to reset the

date and time (using the Date & Time control panel).

8. Reset PRAM (Press the power button, then hold down the Option-Command-P-R

keys until you hear the startup chime at least one additional time after the initial

startup chime).

9. Remove any additional RAM

10. Remove AirPort Card.

11. Try known-good DC board.

12. Verify cable connections and check cables for damage.

13. Verify power button is connected properly to logic board, if power button is not

functioning correctly or damaged, replace the top case.

14. Replace logic board.

The computer freezes during startup or a ﬂashing question mark appears

1. If using Classic in Mac OS X, check for incompatible extensions:

• Turn off system extensions in Classic by opening System Preferences, clicking

Classic, clicking the Advanced tab, and choosing Turn Off Extensions. Click

Restart Classic.

• If turning off extensions appears to solve the problem, identify and eliminate or

reinstall the extension that is causing the problem. Open the Extensions Manager

control panel, and turn off the extensions that you suspect are causing the

problem. Restart Classic with the extensions turned on again.

2. From the Software Install and Restore disc, use Disc Utility.