Everything Larry says plus check that the jumper next to the button to turn on the booster is connected to the right jack. On our 2010 both TV's were a pain to get programed right, and they both programed differently but once we got it done they've been great ever since.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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