Chosen Solution
I’ve had this issue on and off. In the past, it has simply resolved itself randomly. Hoping to find a more permanent solution. I am unable to use built-in speakers or microphone on my Mac, and when I go to system preferences>sound, no input or output devices appear listed. When I plug headphones into the headphone jack, the computer does not recognize these either. However, when I use Bluetooth headphones this does work. I spoke with Apple on the phone and they had me reset Pram and try starting in safety mode. Finally stated up in diagnostic mode and got the error VFF001 as a hardware issue. They said I’d have to take it in to an apple store and spend probably hundreds on it, which is a lot for a nearly 7 yo computer. Since then I’ve also tried reseting SMC, but no luck. Heard this may be an I/O board issue. Any thoughts?? Thanks in advance
It does sound like the Cirrus DAC which is part of the I/O board has failed or the I/O cable is bad.
I would first see if the I/O cable fixes things then go with the I/O board following this guide MacBook Air 13" Early 2014 I/O Board Replacement
