Hi, I got one of the 55" 3D LeTVs last year, but didn't set it up until last week. When on cable, both HDMI1 and HDMI2, the TV goes black for about 2-3 seconds every 3-5 minutes, then comes back. No pixelation, just off, then on. This does not seem to happen when I'm watching something through the USB port. I replaced the cable box, and the HDMI cable, and had HughesNet run tests on the satellite, (all okay on their end) and none of these made any difference in the problem. Any help would be appreciated. Bob