Something wrong with my built-in camera

Hi all:
I'm having trouble with my MacBook Pro (2012Mid, 13-inch),
the built-in camera just don't work. Like it completely disconnected form my Macbook Pro.
the facetime and the photo booth only said "No camera connected".
I have tried to reset my PRAM & SMC but the problem still there, and the keyboard backlight can't adjust automatically.
Is there something I can try before sending it to repair?
thanks all
OS Ver 10.10.2 yosemite

You're welcome.
bluestorm517 wrote: ... now it can't be detect even on the system profiler... I wondering why....
When your Mac cannot recognize the camera in System Information after you have tried all the suggestions already offered, you likely need professional help. Unless you have a current backup of your startup disk, make one now.  Then use the final "Troubleshooting" suggestion:
"... contact Apple or an Apple-Authorized Service Provider for service."
Message was edited by: EZ Jim
Mac OSX 10.10.2

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