I have some more info. I have tried two tv's now. One almost new, and the one that was in the camper, which is fairly new. After doing a channel search they both find no channels. There is a tv hook-up on the counter by the sink, with a little black switch on it.
What is the little switch for? A red led comes on when swithed, no red led the other. Also there is a small hole on the same plate below it, about 1 inck in dia. or so. What is that. That isn't a tv amplifier switch is it? Can I get the antenna gear out by myself and run new cable, or would the cable probably be alright? The worm gear is broke.
I went up and took the top off. Its a SignalCommander, whether that is the make of model? So I know its not the tv that was in the camper, now I know that much.