Audio problem with A1534

[Paky46]

Hello
i have this macbook A1534 with liquid damage on the keyboard but the motherboard looks perfect
It didn't turn on and I noticed that the keyboard flat was oxidized. after cleaning it the mac turns on regularly and both keyboard and trakpad work perfectly. My problem is that I have no audio unless I try to raise or lower the prohibition symbol appears
some idea?

 

[2informaticos]

Clean audio flex and connectors.
Also try known good audio board.

 

[Paky46]

Tried cleaning the flats and board but they were clean
On system preferences / sound / output I don't see the speakers.
Could they be the problem? unfortunately I don't have another board or speakers to test

 

[2informaticos]

Is the audio codec recognized in System Report?
Headphones sound also not available?

 

[Paky46]

no sound in headphones no codec

 

[2informaticos]

What is the exact 820-xxxxx code of your board?
Must post this when you open new thread.

Audio codec is on RIO (audio) board.
I suspect flex, connectors, or audio board...

 

[Paky46]

sorry the board is 820-00687A

 

[2informaticos]

Check voltages and signals for J6799.

"I suspect flex, connectors, or audio board"
Don't forget that...