I don't watch tv that much. Starting about 2 weeks ago whenever I turn on my tv there is no picture or sound. It seems like it is freezing up. I have to unplug my box and plug it back in to get xfinity to work. Xfinity sent me a new box last week and I still have the problem. If I unplug the hdmi cable when this happens it doesn't fix the problem either. Any ideas?
Switch cables or switch HDMI ports to isolate the problem.