no volume(grayed out)a1534

i have a MacBook (retina, 12" early2015) that has no volume. I have tried resetting the device and booting it in safe mood and have made another account to check and to all this still no avail. i waned to know what i can physically start checking on the board or int the device to see what this problem can be
 
thank you for the reply
We have very little history on the device, all we know is that a little bit of wine was spilled on the device at one point. Currently no audio is working even if I plug in headphones unfortunately we do not have another audio board to test on, there is nothing I can physically see wrong on the board.
 

2informaticos

Administrator
Staff member
Liquid spill affect audio board very easy.
Was the wine spilled on the audio board side?
You should check audio connector on the MLB and flex terminals.

I do not recommend to waste time with MLB, before testing known good audio board.
 
We don't know too much about where it spilled. I have an audio board for this device on the way so got our fingers crossed. I also had one question if you wanted to find schematics for this board where would you be able to find them
 

2informaticos

Administrator
Staff member
Look if System Report shows audio codec at least.
If not, check J6799 for corrosion.
Try another audio flex too.
 

2informaticos

Administrator
Staff member
Inspect J6799 for corrosion.
Be sure to get the 3 power rails at its pins.
Also check AUD_PWR_EN abd HDA_RST_L.
 
Top