Camera hardware on Macbook Pro suddenly stopped working

Yesterday I was in the middle of a FaceTime call and suddenly my camera stopped working. I restarted my computer and the camera worked temporarily, then just as suddenly it stopped. When I restarted again, no camera was found.
I checked around and tried that tip from OSXdaily - shutting down the VDCAssistant using Terminal. I also updated all of my software. I'm fully up to date in terms of the operating system. I've tried the whole zapping the PRAM thing also (ctrl+opt+P+R). I've set up additional accounts, checked across different applications - nada.
Any other suggestions as to what the issue could be and how I can fix it? I bought my MacBook Pro at the end of December 2011, so it's not new, but it's in great shape.

http://support.apple.com/kb/HT2090 How to Troubleshoot iSight

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