Volume is locked?
My volume is locked on my macbook air, meaning I can't change the volume, in the system preferences it's showing "no input/output devices found" and there is not red light coming out of the headphone jack, I've also tried plugging headphones in 5 or 6 times and no luck. This has been happing quite a few times now and I have no idea what to do, I've reset the PRAM and at first it worked but now it hasn't been working, so I'm kinda lost on how to fix this
MacBook Air, macOS High Sierra (10.13.3)