I have asked this in the specific forum, but with no solution, or even guesses. I did a search and came across at least three others that had the same scenario over the years. I stopped there since it was apparent it isn't just my unit.
The specific device involved ("TiVo HD" DVR) has had some issues with the HDMI out. What makes it unusual is during the boot process from a power off state, the initial splash screen (welcome) is visible, but everything else is not. The component & composite outs are good.
I tried this on two TV's; one HDTV, and the other a PC monitor w/HDMI in,
I tried two different HDMI cables, both only 6 footers,
I wiggled the connector in case that was it as it has been reported with some others,
I cleaned the connector with tuner cleaner (no lube) even though it looked clean (both sides) under a magnifying lamp,
I even tried different output resolutions available on the DVR.
Mind you, video is visible initially for 90 seconds with the welcome screen. Solid video. To me, that eliminates a bad cable, a bad connector and/or a dead HDMI chip(s). I'm told the initial screen is at 480i. I did set the DVR to 480i out, abut no difference.
What also is strange, the 2nd screen is also at 480i, but that doesn't show.
My first thought is a handshake issue, but with two sets? And if so, why just the initial video is visable? My other thought is some defect in the system that somehow allows video at first, but none afterwards.
My question is; the dreaded copy protection, can that be some issue here? Though that really doesn't make any sense since the 2nd screen (still booting) doesn't show.
Abundant OTA television is what makes this country different from all others. Lets keep it this way. If you like Wi-Fi so much, OTA fits right in. After all, it is wireless.