Internal Camera won't start after Upgrading to OS X El Capitan
I own a MacBook Pro previously running OS X Yosemite and recently upgraded to OS X El Capitan. I have a built-in Camera that automatically turns on when I open apps like FaceTime and Photo Booth. Since the upgrade, I'm getting messages that the camera isn't available is is off. There is no switch to turn on the internal camera that I'm aware of.
Checked the system report under USB and it recognizes my FaceTime HD Camera (Built-in).
I've also attempted to run diagnostics using both Apple Hardware Test and Apple Diagnostics but both won't execute the diagnostics tool.
I created a new use account with Admin privileges and that didn't work either.
I also installed Skype to no avail.
How do I get my camera to work.
MacBook Pro (17-inch Early 2011), OS X El Capitan (10.11)