If all that fails, run a coax from the park connection thru a window direct to your TV. If it works, you likely have a issue with internal RV wiring, could be as simple as a faulty connector install. If it does not work, could be the park. Would also be worthwhile to swap out the coax you are using for your outside hookup, it could be faulty.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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