Troubleshooting

 

Symptom Charts/Video - 14

Backlight doesn’t

1

Adjust screen brightness setting.

operate

2

Verify that backlight cable connection is secure.

 

 

3

Check display cable, inverter board, and I/O logic board

 

 

4

connections.

 

 

Verify that inverter cable is properly connected and that

 

 

5

cable is good.

 

 

Verify that cables are not pinched or severed.

 

 

6

Replace inverter board (international only).

 

 

7

Replace display (international only).

 

 

8

Replace I/O logic board.

13.3” screen flickers

Carefully squeeze the upper left side of the display bezel. If the

or shows intermittent

problem disappears, dispatch unit for display cable replacement

vertical lines

(13.3” displays only). Do not replace I/O logic board or display.

Page 71
Image 71
Apple M4753 manual