Are you sure your TV's are Digital-Capable? Mandatory conversion to DTV was 2009 and your coach is 2008 with TV's that could have been made earlier. Unless of course they were replaced.
I've had to re-wire (just rearrange the connections) on two RV's that somebody thought should work some other way.
On was a Winnebago View and it was pretty complicated. It had a flat screen but the flat screen was not DTV. It had both Cable and Satellite capability, and to that a "tech" tried to add a Converter (DTV to Analog) Box. Luckily Winnebago has all the wiring on-line and I worked with the owners to get it back like it was meant to work, and they had replaced the original TV with a DTV version that didn't call for a Converter.
The other RV I actually worked on was ours. The Signal Booster Plate
was mis-wired on the back side.
This Document shows you how this plate should be wired on the back side. Note Antenna is one side, Cable is the middle, and Set Two (like in another part of the RV) is on the other side. The coax connector on the FRONT of the panel is Set One.
Our coach had only the panel pictured. The Winnebago had another panel and more connections.
Another time we were camping and a man came over asking how to watch TV. Was scanning for channels and finding none. Turned out that TV wasn't DTV even though it was flat screen. I had a spare converter and we tried to connect it but we never really succeeded. Got one channel. This can get tricky, and we couldn't find wiring diagrams for that RV.
