820-02020 m1 no sound out.

[Soji]

The system is working but no sound. I use the mic to record, there was signals but no sound when playing out. Pls help
I have check around ur600 and ur630 no corrosion no shot. Then ur500 looks good.

 

[2informaticos]

Any history available?
Speakers detected?
Tested headphones?

 

[Soji]

Yes volume keys is working on the Touch Bar
It’s a clean board

 

[2informaticos]

Check diode mode to ground at SPKRAMP_INT_L and SPKRAMP_1V8_RESET_L; compare with good board.

 

[Soji]

Thanks SPKRAMP_1V8_RESET_L was shorted on one of the sparkler amp ic. It’s fixed.