820-01958 no audio

[ajdoc]

Audio board and flex had liquid damage and MacBook wont turn on. Flex and board replaced and boot but there is no audio.
Tested with three audio boards and flexes.

There is in setting output device.
When press vol up/down I see it on screen.
Mic works fine.
Audio works fine via hedphone jask socket.

There was short on C6408 - replaced U6400, short is gone, issue with audio the same.

J6100 in diode mode looks good.

Tested with known good speakers as well - same issue.

Any idea?

 

[2informaticos]

Very likely T2 internal damage.
Check diode mode to ground at SPKRAMP_RESET_L and SPKRAMP_INT_L.

 

[ajdoc]

In diode mode:
SPKRAMP_RESET_L 0.393V
SPKRAMP_INT_L 0.392V

 

[2informaticos]

Check voltage too and compare with working board.
Need to have audio board connected.

 

[iMuhtaseb]

@ajdoc hi
I would like to have an update on what exactly was wrong in your case? cause I currently have an exact issue of yours.