Camera Switcher? 2016 Itasca Sunova 35G

[spydorman]

Hi, have a 2016 Itasca Sunova 35G with a Pioneer AVH-X2700BS radio.
Cameras have always worked fine, except now after about 10-15 min on the road the rear camera will just stop displaying. Sometimes it will come on for a short time, but then goes out again. There is no static or flashing of the display that might indicate a loose connection. It just goes out.
From what I understand the Pioneer unit only has one input for a camera, so there must be an external switcher of some kind to switch between the side cameras and the rear. Was wondering if it may be the problem?
I am considering replacing the whole head unit as I really don't like the Pioneer radio much. Not very user friendly in my opinion. Just don't want to replace it and find that I am still having the same problem.

If so, does anyone know a model or where I can get one?

Thanks!
Carl