820-3437 - No Audio

[menatwork]

Pretty Much Clean however, no AUDIO.
1- Audio codec recognized in the System
2 - Volume bar available
3 - No audio on the Headphones or speakers.

Any hint?

 

[2informaticos]

As first step, try known good LIO board/flex.

 

[menatwork]

That was the first thing i did.

 

[2informaticos]

Inspect J9500 internal contacts and solders...

 

[menatwork]

Its perfect - Internal and external.

 

[2informaticos]

OSX recognizes headphones insertion?
Connect/disconnect and check if audio output switches from speakers to headphones.

 

[menatwork]

Yes, the OSX Recognized the headphone.
Everything looks fine. But no audio at all.

 

[2informaticos]

Try another speaker, just for test.
Headphones comes out from codec directly; very strange symptom.

Check AUDIO_PWR_EN, SPKRAMP_SHDN_L and PP1V5_S0SW_AUDIO.