Macbook Pro (late 2012) built in camera not working

I don't know how long it hasn't been working!! maybe since the upgrade to High Sierra.

Tried using it today for FaceTime and it tells me there to connect a camera, tried Photo Booth and got a similar message.

Looked in system profiler and it tells me there are no video capture devices found.

I can see the camera lens, but I can't find any reference to drivers for it, can anyone help?

Thanks