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820-00281 no audio

A

ajdoc

Member
Cant find any liquid damage.

Same issue on clients macOS, Bootcamp and on mine external macOS.
No audio.

In system preferences > Sound Output and Input shows 'No devices found"
On touchbar volume buttons are grayed out.

Headphones not detected when plugged in.

U6400/40 and U6500/50 got power rails present.
AUD_SPKRAMP_RESET_L got only 0.01V

R6401 got correct resistnace.

U6200 got power rails present
AUD_CODEC_INT_L 1.8V
AUD_SPKRAMP_INT_L 1.8V
SPK_IDO 1.8V

Any idea?
 
A

ajdoc

Member
Removed U6200 and all pads are connected with rest of the board, no broken lines.
Replaced U6200 but issue still the same.

Any hope?
 
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