10 -
iBook (14.1 LCD 16 VRAM) Troubleshooting
Symptom Charts
Video (RGB adapter)
No video on an external device
1. If in Mac OS 9, in Resolution Control Strip, verify that monitor 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 known-good RGB adapter.
5. Replace logic board.
6. Replace RGB adapter cable.
7. Replace logic board.
No display, or dim display, but computer appears to operate correctly
1. Remove any connected peripherals.
2. Try known-good power outlet, power adapter and power cord.
3. Press the F2 (with the fn key pressed and not pressed) to increase the screen
brightness setting.
4. Reboot the computer—hold down the Control and Command keys and press the
Power button, or press and hold the Power button for 5 to 10 seconds to shut down the
computer, then press the Power button to restart.
5. Verify backlight cable and LVDS cable connections are seated properly and that the
cables are not damaged (refer to display assembly replacement instructions).
6. Replace display assembly.
7. Replace logic board.
Misc. Symptoms
The computer runs with battery, but not with the power adapter plugged into
wall outlet
1. Try known-good power outlet.
2. Try known-good power adapter and power cord.
Note:
Verify that power adapter connector glows amber or green. If the power
adapter light is green, turn over the computer and press the battery button. The
battery lights should glow green and stay on if the power adapter is operating
correctly.
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