How do I get my built-in speakers to work again
I recently had my built-in speakers stop working less than a year after purchasing my MacBook Pro 15". About 24hrs ago, my built-in speakers were working fine. At some point, I was using my bose headphones, and after I unplugged them, my speakers did not work. I've confirmed that the sound is not muted. I have sound visible on the desktop bar, but it is grayed out. I looked on my system preferences for audio output, and my speakers are not listed as an option. Only optical digital-out is an option besides my Apple TV.
MacBook Pro (15-inch, Mid 2012), OS X Mountain Lion (10.8.2)