There's an iMac whose FaceTime HD camera isn't displaying video images in applications like FaceTime, Photo Booth, or QuickTime video recorder.
OS X El Cap shows that the camera is attached and registered properly in the About This Mac - System Report.
- fresh new install of El Cap on a Fusion drive. Previously the camera worked well with Yosemite.
- the green light indicator flashes on/off repeatedly and irregularly when you start an application that uses the camera
- there are no error messages or anything about no cameras being attached.
- pressing the big button to take a photo in Photo Booth has no effect. The button is on the screen, but isn't pressable.
- Skype is not installed
What steps can I take to get the camera to capture and display video properly?
Attempts to fix
Items to investigate
I recently opened this iMac to install an SSD. All cables were re-attached properly.