Apple G4 manual Misc. Symptoms, Latch not working

7.Replace inverter board.

8.Replace display assembly.

9.Replace logic board.

Computer appears to work, but no video on external device connected to the TV out port (S-video out port)

1.The device must be connected to the S-video port while the PowerBook is sleeping or off for the device to be recognized.

2.If running Mac OS X, verify that this issue is also in Mac OS 9.

3.Verify monitor that is used in testing is known-good and is supported by this computer.

4.Try different cable(s).

5.Replace logic board.

No video on an external VGA device connected to the external monitor (DVI- I) port

1.In the Resolution control strip, see if the device is being recognized. If so select resolution.

2.If running Mac OS X, verify that this issue is also in Mac OS 9.

3.Verify monitor that is used in testing is known-good and is supported by this computer.

4.Try another DVI-to-VGA adapter cable.

5.Restart the computer and test again.

6.Replace logic board.

Misc. Symptoms

Latch not working

Note: When the display is being closed, a hook in the top of the display housing should be magnetically pulled down to the latch. When the latch button is pushed, the hook should release and retract into the display housing.

1.Verify hook operation by exercising the latch mechanism.

2.If the hook does not operate properly, replace the display assembly.

3.If the latch or latch button does not operate properly, replace the top case assembly.

Misc. Symptoms Symptom Charts PowerBook G4 (1GHz/867MHz) Troubleshooting - 16