Originally Posted by elfi
As a test we hooked up the receiver with a coax connection to an extra TV, same bad picture. I understand that coax does not provide the quality that HDMI would but I thought we should get a better picture than we do. I also by-passed the switch box same result. We also hooked up the satellite dish from the house to see if it was the Tailgater, same result. So I'm fairly sure it's the coax. I'm trying to find out if there is something like a coax booster, or find out where the coax runs and replace it with HDMI.
Before you rip everything apart would you please check both end of the coax. Specifically the back of the electrical compartment the coax to the interior is screwed into the back of the white plate. Check that coax to see if they left a thin later of clear plastic on the center copper wire. I had a similar problem when I bought my rig new and the center wire was not stripped all the stuff off of it.
You can do this on both ends of that coax inside at the switch too.
Let us know.