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Troubleshooting Symptom Charts/Video - 11
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.