The volume on my macbook pro has suddenly become greyed out. I haven't installed any updates or made any modifications to the computer, it just suddenly became greyed out after waking the macbook up from sleeping.
I've tried resetting the PRAM, but I don't hear any chime at all when I start up my computer, no matter how long I wait/how many times the computer re-restarts itself.
There also seem to be no internal speakers detected when I go into system preferences. For both input and output the computer detects 0 devices.
Thanks so much in advance for any help!!