backup camera Jensen radio

[1930fordcoupe]

I have a 2013 Thor Palazzo 33.3. My rear backup camera has stopped working. The only indication I get is "no input" on the screen. Both of the side cameras work just fine. I have checked all connections and they seem to be fine.

[JamieGeek]

Its possible the plugs wiggled out behind the radio.

Mine go out with the roughness of the road (Jensen radio 215) but so far they have always managed to come back on.