HTR-Informatique
New member
What are C1, C4, A3 and A4 on the schematics / boardview?
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MacBook Air 13" A1466 820-00165 - Backlight
- Thread starter HTR-Informatique
- Start date
Look at U7701 in schematic.
I prefer to use schematic, instead of boardview...
I prefer to use schematic, instead of boardview...
HTR-Informatique
New member
C1 (pin 11/16): 5.10V
C4 (pin 14): 3.30V
A4 (pin 4): 2.15V
A3 (pin 3): 2.78V
C4 (pin 14): 3.30V
A4 (pin 4): 2.15V
A3 (pin 3): 2.78V
These values look good.
What voltages on both sides of D7701 now?
What voltages on both sides of D7701 now?
HTR-Informatique
New member
8.55V on the pin 1
8.53V on the pin 2
8.53V on the pin 2
Be sure D7701 is not shorted A-K.
Backlight circuit is enabled, but doesn't boost for some reason.
Did you try other display assembly?
Try few PRAM reset.
I still doubt about U7701, or its solders.
Backlight circuit is enabled, but doesn't boost for some reason.
Did you try other display assembly?
Try few PRAM reset.
I still doubt about U7701, or its solders.
HTR-Informatique
New member
PRAM reset done several times but nothing. The screen is the only one I have but it works perfectly with other motherboard. I have to watch if short circuit and if not replace U7701.