820-3332 missing LCD_PWR_EN

[dudipupan]

Hey,

i got a 15" MBP (820-3332) with no display an no backlight. PPVCORE_GPU looks fine (1.06V) but LCD_PWR_EN is missing (no short to ground). I got USB activity but no image on external display.
Could it be a faulty GPU?

Thanks and best regards

 

[2informaticos]

Missing internal and external image at same time, points to graphics issue.
Try PRAM reset 2-3 times first.
And resolder U8900 with leaded solder, as usual in this board.

 

[dudipupan]

Just did the resoldering and the pram reset but no changes.

 

[2informaticos]

There is an easy hardware mod to disable GPU om this board; search the forum.