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Troubleshooting Symptom Charts/Video - 12
No display, but
computer appears to
operate correctly
Note:
If sleep light is blinking and computer is not in sleep
mode, reset power manager.
1 Insert disk into floppy drive and press Command–e (eject
disk) to verify that computer is working.
2 Adjust screen brightness setting.
3 Verify display cable, inverter board, trackpad, keyboard, and
logic board connections.
4 If display cable connection to logic board is loose, replace
brightness and speaker grill.
5 Connect power adapter.
6 Replace inverter board.
7 Replace display.
8 Replace logic board.