820-3437-b no audio

TBFix

Member
No evidence of spillage. I tried good i/o cable and board but still no Audio. Os does not see any audio device. checked J9500 under microscope for bad connection.
AUDIO_PWR_EN 3.3v
PP1V5_S0SW_AUDIO 1.5v
I also replaced U8040 .
 

2informaticos

Administrator
Staff member
Any history available?

If audio codec is not recognized, you should have problems with HDA_x lines.
Check R1310-13 resistors first.
 

TBFix

Member
Those resistors measure and look fine. This came with no sound, no evidence of spillage. No audio hardware in OS.
 
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