Why is the Camera not working?

I have a MBA running Sierra. The camera doesn’t appear to be working. The system doesn’t recognize it under USB. As a result Pb, FT and Google Hangouts will not work without the camera.

I have tried SMC and PRAM reset. Also, I another account and Safe mode with no resolution.

Perhaps the camera cable needs to be reseated or the camera itself is defective.

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When you bought the system was the camera working back then?

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