Apple M9628LL Service Guide - Page 156

Video (RGB adapter), Misc. Symptoms, No video on an external device

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4. Try a different TV or VCR. 5. Try a different adapter cable 6. Replace logic board. Display shows ghosting (signal reflection) 1. Verify that cables are correctly installed and firmly seated. 2. Replace video adapter. Video (RGB adapter) No video on an external device 1. Verify monitor that is used in testing is known-good and is supported by this computer. 2. Try known-good RGB adapter. 3. Replace logic board. 4. Replace RGB adapter cable. 5. Replace logic board. Display shows ghosting (signal reflection) 1. Verify that cables are correctly installed and firmly seated. 2. Replace video adapter. 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. 3. Reset the power manager by pressing the key combination Control-Option-Shiftpower. Warning: Make sure you do not hold down the "fn" key when resetting the power manager. Warning: Resetting the power manager will permanently remove a RAM disk, if 10 - iBook G4 (14.1 LCD) Troubleshooting Symptom Charts

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10 -
iBook G4 (14.1 LCD) Troubleshooting
Symptom Charts
4.
Try a different TV or VCR.
5.
Try a different adapter cable
6.
Replace logic board.
Display shows ghosting (signal reflection)
1.
Verify that cables are correctly installed and firmly seated.
2.
Replace video adapter.
Video (RGB adapter)
No video on an external device
1.
Verify monitor that is used in testing is known-good and is supported by this computer.
2.
Try known-good RGB adapter.
3.
Replace logic board.
4.
Replace RGB adapter cable.
5.
Replace logic board.
Display shows ghosting (signal reflection)
1.
Verify that cables are correctly installed and firmly seated.
2.
Replace video adapter.
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.
3.
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 will permanently remove a RAM disk, if