Diagnosing 2011 Macbook Air Webcam SYMPTOMS


FaceTime indicates no camera is available
The website: WebCam Test indicates a webcam could not be found
OS X Version 10.11.6 "System Report" Hardware -> Camera -> No video capture devices were found


The camera was last used with FaceTime in January.

QUESTION

Are there any command line diagnostics that can be performed to determine why the Webcam is unavailable?

UPDATE

Apple Hardware Test Results: No camera list under "Hardware Profile" Tab.

Alert! Apple Hardware test has detected an error.
4HDD/11/4000000:SATA(0,0)
Chances are your OS X installation is broken.

First run Apple Hardware Test, restart and hold D.

Still not showing in System Hardware profile ? Slim chance but it wont hurt, reset your SMC and PRAM.

Still not working ...

Make backup to Time machine (external drive)

Restore your OSX , restart and hold Command-R that will get you in to Restore screen. Follow the instructions.

Still not working...add new MacBook Air to your Christmas wish list.

Buy a cheep USB video camera so you can survive till then.