Camera turns off during FaceTime
For the past week or so whilst using FaceTime - the camera suddenly turns off.
camera icon with a slash through appears on a black screen with the words.'No camera available, To use FaceTime, connect a camera'
The green camera light is also off.
If I re-boot my computer it will come back on, but then turns off again mid-call.
I've seen a few things the web that people are suggesting to remedy.. but don't know which info to trust.
iMac