![](http://pdfasset.owneriq.net/e/54/e548fd50-3b09-4d7c-a7c4-0d792b9a91f6/e548fd50-3b09-4d7c-a7c4-0d792b9a91f6-bg32.png)
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.