For the past 2 years I have had the local NBC in Richmond VA (WWBT Channel 12 on FIOS 512) affiliate occasionaly go completely black. When I switch to the SD channel (12 on FIOS) the SD signal is always there. I go back and the HD channel is still black. If I am not watching and DVR'ing something, I will have various periods of black on my recording. It will go back on it's own after a period of time when I am not watching and will come right back if I am watching as long as I power off the HD DVR to reboot. This has happened despite 3 HD DVR upgrades (started with the moto 6416, continued with the 7216, and keeps happening on my current 7232). Never had a problem on my SD boxes because it is an HD signal problem. Use HDMI and tried switching to component and had the same problem. 2 different brand HD TV's (Samsung and Panasonic) with same result. Had the tech over a few times (replaced ONT once, other times detected no signal problems or connection problems). Don't know what else to check as Verizon seems out of ideas. Really getting tired of coming home hoping to see a DVR'd NBC program and finding it be black when I push play. Help!
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