Cable TV
This may sound stupid but it won't cost you a dime to try it.
If you are hooked to cable, turn off the "green light" which is the antenna booster. You don't need to boost the cable signal. If that doesn't work, you may have a bad booster. We had a problem getting only 4 channels on our TV. The camper next to me had the same antenna and was getting 36 channels. I had to replace the booster and everything is fine. Easy Peasy.
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