I have a class C 2017 Freedom Elite 26HE motorhome I purchased this summer. The Axxera radio/back up camera worked while driving all summer. Recently I took it on a trip to the North Shore the radio nor camera would work while driving. I hooked to shore power and it worked. I checked to make sure chassis battery was in use mode and also pushed pin in reset hole on the unit. Did not help. I am looking for suggestions on how to remedy.