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. 

Have you tried a PRAM reset?
http://support.apple.com/kb/ht1379
If you look in the audio output port, is there a red light showing.  If so, the internal switch is stuck..  Insert the headphones a few times, jiggle a toothpick inside or shot some compressed air to trip the switch.  If no success, have the Apple store genius bar technician do it.
Ciao.

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