820-3437 no audio

[turbo]

i have this 33437 board , had slight water damage , cleaned , there was some trace missing around smc i fixed those those ; now board working but no audio, i also tried known good i/o board and flex cable , any idea where what would be wrong, in osx it showing no audio device , j9500 looks good too

 

[JohnB8812]

U8040 is a very common culprit when no audio devices are found. Do you get any voltage on PP1v5_S0SW_AUDIO? If no, check for short on that line. I've had many 00164/5 boards have that chip be bad and cause no audio, so it wouldn't surprise me if that's the case here.