I get 23 channels Now I get only 9. I don't have cable. I have an antenna. Channels stop after law and order. What do I do

Cpp6290

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Apr 6, 2017
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I was watching law and order. My TV said no signal go to input, when I did and scan. I got 9 channels. I was getting 23. Now I can't see Grey's anatomy and scandal and how to get away with murder. Please help me.