[grey ghost]

I feel your pain!!! I have a 2020 Keystone Montana 3121RL and the key system never worked right from the get go. I tried everything and the only thing that would work was hooking it up direct so I drilled a hole in the back of the living room slide and ran it direct to my Dish box. I asked the tech at the shop while I had it in getting some other things fixed and he said 90% were hooked up wrong from the factory. Her said he would re-wire it for me. I haven't had it out since he fixed it but will try it shortly. Might ask someone to follow the TV wiring from the outside connection to the inside box. Just a thought.