E350 backup camera doesn't work -please help
 

I have been trying to fix my backup camera for some time now. I bought my 2012 E350 with 97k on it and had the problem since the time off purchase. When I put the car in reverse it doesn't show the lines of anything. Just tells me to check my surroundings and shows a black screen kind of like a tv when you disconnect the HDMI cable. I've tried wiggling the connections and replacing the fuses. Could there be an actual problem with the camera itself?