I've made the connections, thrown the right switches, scanned for channels, and I NEVER get any cable signal irrespective of what RV park I'm at. I have an Insignia Fire TV. Please offer advice.
Our 2022 340 had the same problems when we got it. I found the junction behind the trim panel on the left side bottom of the stove was not made up correctly.
Did you turn off your antenna booster? Not sure where your booster switch is, but it will be a regular coax plate with a button and LED on it. Ours was in the front DS storage on our 390MP.