I have been having the same problem with my television when we are watching our evening shows. Every 10-20 minutes, the TV goes blank for a moment and then we can continue to view the show we were watching. We have Verizon, so I called and they said that it was a conflict with the HDMI cable and the cable box (Verizon issue), and that I should switch to the component cables. I did, and it didn't seem to go away. He also told me that Verizon would resolve the issue by the end of June .... Didn't happen.