Technical information

Symptom Charts / Video -
10
Troubleshooting
PowerBook (FireWire)
Video
Pixel(s) always on or
off
1. A certain number of pixel anomalies are inherent in display
technology and vary by many factors, including type of
technology. If you suspect that the display contains an
abnormal number of anomalies, contact Apple Technical
Support.
Warning:
Do not use a metal screwdriver to reseat the display cable
or shorting could result. Use a plastic or nylon tool.
Partial or full row of
pixels is always on or
always off
1. Check display cable connection.
2. In the U.S., contact Apple Technical Support.
3. Replace display cable (international only).
4. Replace display (international only).
5. Replace I/O logic board.
Display is very light
or totally white
1. Verify display cable and inverter board cable connections to
the I/O logic board.
2. Replace inverter board.
3. In the U.S., contact Apple Technical Support.
4. Replace display cable (international only).
5. Replace display (international only).
An external monitor
connected to the
computer shows no
video
1. Verify external monitor has power.
2. Try different resolutions in the Monitors control panel.
3. Try another monitor cable and verify the video adapter has
part number 590-1123 on the adapter.
4. Try another monitor.
5. Restart unit and reset PRAM.
6. Replace I/O logic board.