Got my replacement yesterday, installed chrome(from googles site) and magic prefs. Started copying files from my external to a folder on the desktop. Decided to try to make a FaceTime call, no luck, the camera won't turn on. Also tried photobooth, skype and a website that will show your camera. Nothing, green light doesn't even come on. Checked the system profiler and it registers that the camera is there. I've restarted, checked and repaired disk permissions, reset the SMC. Currently running an extended hardware test(does that even check the camera?), ran a quick hardware test and it showed no errors. Anyone have additional ideas before I call apple support?