A couple years ago, I had the same problem. The campground manager checked his cable feed from the post and it worked. I tried again with both connections at the back of the trailer and nothing worked. So I ran the cable thru the bedroom window and connected to the tv. Success. The dealer, under warranty, discovered that the inmates at the factory didn’t connect either the cable or satellite runs. You might want to try a direct feed from the pedestal to your tv.
Eric & Ginny
Daisy the Boston
2015 CR Sunset Trail Super Light ST 250RB
2013 Toyota Tundra Double Cab V8 5.7 Ltr Limited