iSight light always on, camera not working
Last night I was using Photo Booth and after I closed it the green light didn't turn off. It has remained on ever since. Now when I open Photo Booth it says "There is no camera connected." The camera isn't recognized on iChat, Skype and iMovie either. The green light only turns off when I shut down, but it turns right back on as soon as I power back up. I've tried everything; resetting the SMC and PRAM. Also tried Repair Permissions. Still nothing. Nothing shows up under the USB tree either.
I have an early 2011 Macbook Pro.
Is this a hardware problem that will require a professional to fix? How much will that cost?
MacBook Pro, Mac OS X (10.6.8)