820-01958 Liquid damage and no Audio.

[ronaldo]

Hello. I received a liquid-damaged MacBook with no power. The liquid primarily affected the audio board and its flex cable, causing a significant burn on the connector.

After replacement, the Mac powered on, but the sleep sensor was shorted. I replaced the right speaker (which contains the sensor), resolving the issue.

However, the MacBook now lacks audio output; both left and right speakers are quiet. Diagnostics revealed a short on the SPKRAMP_RESET_L line. I removed the associated resistor, capacitor, and U6400 Left Speaker Amp, but the short persists. This line originates from the T2 chip.

Is there a way to fix this issue? Thank you!

 

[2informaticos]

What is the exact ohm value of that short?
Sometime is possible to fix, if no pure short.

 

[ronaldo]

It's 0ohms

 

[2informaticos]

No chance then; T2 is f***d.

Just in case, as you don't have anything to lose.
Try to isolate SPKRAMP_RESET_L line from T2 (only).
Then pull it up to 1V8_G3S with 10-47K resistor.