I switched from DirecTV to Dish. I had planned on installing a receiver in my 2011 Tiffin Phaeton. The DirecTV connection to the TVs in my RV was a Component network, i.e., there are four RCA connectors that run the 4 TVs on the RV. I received my received my new Wally receiver today and it has no RCA connectors. Does that mean I have to rewire my coach for HDMI?
You could try an HDMI to RCA adapter. You will have some degradation in quality, because you are sending a higher quality signal through a lower quality protocol. It certainly sounds easier to try an adapter before rewiring.
When I searched for products, here's the first one that came up: