Q: Camera problem after combo update 10.9.4

http://www.apple.com/support/macbookair/contact/

It really sounds to me an OS update issue which caused an older MacBook Air not working with iSight !!

LudoT wrote:... I did reset the PMU but it didn't change a thing.  What could I do ?

Did you try the other relevant suggestions from How to Troubleshoot iSight?

(Over time, 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.)

Tried all and it doesn't help.

No device under Camera but it appears under USB "sometimes".

simple.man wrote:

 

Tried all and it doesn't help.

No device under Camera but it appears under USB "sometimes".

Then, unless you have a current backup, make one now.

  Then use the final "Troubleshooting" suggestion:

"... contact Apple or an Apple-Authorized Service Provider for service."