“We have problems with a picture that repeatedly blacks out and reappears on our Dynex 55" LCD HDTV After watching tv for about 20 minutes, either DVR'd programming or live (we have AT&T UVerse), the screen blacks out, then the picture blinks on, then goes black and repeats 2-3 times, and finally comes back on. This happens with 2 different HDMI cables (at first we thought it could be a cable short). Is this a problem with the HDMI 1 Port where the AT&T UVerse TV HDMI cable is connected to, according to the instructions? Is anyone else having this problem? We connect the television to both the UVerse Box (via HDMI cable), and to Antenna (via Coax Cable to the coak port labeled "Antenna In").”