Specifications

Troubleshooting Symptom Charts/Video - 11
No display, but
computer appears to
operate correctly
Note: If the sleep light is blinking and the computer is not in
sleep mode, reset the power manager.
1 Insert a disk into the floppy drive and press Command–E (to
eject a disk) to verify that computer is working.
2 Adjust screen contrast and brightness settings.
3 Verify display cable, inverter board, trackpad, keyboard,
and logic board connections.
4 Connect power adapter.
5 Replace inverter board.
6 Replace display.
7 Replace logic board.