At first, the mechanic thought it was the camera itself. We waited two weeks for a new camera, then left it at the dealership for repair. After they put the new camera in, it wasn't the camera. Then we were told they were going to have to trace the wiring from the camera to the screen on the dash. That meant taking out what ever was necessary to follow the wiring. Turns out it was a couple of relays buried inside the cabin somewhere that needed to be replaced. It works now.