820-00840 No display

[ronaldo]

Help Please.
This Mac came in with no display.

After replacing the screen, it displayed for a few minutes and then stopped again.

EDP_AUXCH_C_N - OL

Is there a way to fix this?
Thanks

 

[2informaticos]

This line goes directly to CPU.
If you can't find broken trace, then try to reflow the CPU; in case of broken solder ball.