[SOLVED]820-3476 - No backlight

[rvanpruissen]

Gets to the Apple logo, but no backlight.

The gate of Q7700 is not being pulled low. Enable is present and resistors in the voltage divider are fine. I've replaced U7700, still doesn't work. Any suggestions?

I've bridged U8050 because I don't have replacement parts.

Any suggestions?


Thanks, Rick

 

[dukefawks]

Tried a known good LCD of the correct year?

 

[rvanpruissen]

Yes. Interchangable with a 820-3536 screen right? Just replaced the LVDS connector, no improvement.

 

[dukefawks]

Yeah 3536 is 2013 model too.

Diode mode on pin 3 and 4 of LCD connector?

 

[rvanpruissen]

Nm. Fixed it by replacing Q7700. Thanks for your help!