We have a new Prowler 20RBS, and have had similar issues with the cable and satellite connections. We connected the cable to the connector at the back of the camper, and could not get a picture. We thought maybe the input connection for the cable and satellite were switched, and we tried that too - but it did not work. As a temporary fix - we bypassed it by running the cable through the rear window and directly to the t.v. and put this issue down on our warranty list. We took our Prowler out for its maiden voyage over the 4th of July. We had the same issue at the RV Park, and ended up running the cable inside through a window. After we had returned home we wanted to check all of the connections again - and, amazingly we were able to use the outside connection with success - but we connected it to the satellite, not the cable connection - and although we are using cable services it works fine. We have left this item on the warranty list - possibly the "satellite" and "cable" labels over the connections in the back are reversed?