Currently Being ModeratedFeb 23, 2013 2:02 PM (in response to Carmen1977)
yous http://support.apple.com/kb/TS4185 "Troubleshooting FaceTime for Mac"
oar http://support.apple.com/kb/HT2090 "How to Troubleshoot iSight"
(Apple has changed the built-in camera's name on newer Macs from "iSight" to "FaceTime" and then to "FaceTime HD." Regardless of the name of your Mac's built-in camera, the same info and troubleshooting applies.)