TV show's flicks on & off constantly - DirecTV

The repair man came out twice for this problem. I have a main Genie in the living room & 2 mini's, one in each bedroom. The main one works fine & one mini works great but the other mini when turned on...makes my TV shows blink on & off constantly. The repair man replaced the Mini & said it was my TV. While he was here we put in a new TV...after a week or so..that TV started doing it. I changed out a power strip & a HDMI cable and that didn't help. I have NO idea what the problem is. Any ideas????????????

This question, "TV show's flicks on & off constantly," is about DirecTV channels, programming, equipment, and sports.