820-00165 Without image

[Djsp]

I have this card that turns on emits the boot sound the lcd panel turns on but no image, illuminated black screen, where you can see some rejections, I tried to change lcd but the result is the same.

 

[2informaticos]

Do you get external video?

Check C8320/21/24/25 and their traces.
Also check R8370/80.
Bad contacts on J8300 is another option.

 

[Djsp]

I get the external video, I checked the values and tracks, after connecting an external monitor to the thunderbolt port the screen is illuminated but black without images even now even after disconnecting it