You might consider eliminating the trailer, antenna booster and all the connections behind the walls by running the cable directly from the campground connection through a window and directly to the TV. If that works, then troubleshoot to find the problem. If that doesn't work, the problem is either the campground, the cable run or the TV. It's a matter of determining which one (or two or three)..... I'd start with a cable through the window and see if it works.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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