Like a lot of people, I had pretty awful SD images on my HDTV. I had the cable company out to try to fix it, to no avail. I researched the issue and found a product that I thought would help with the compression artifacts that caused the awful images, the Algolith Flea-HDMI. It's not cheap, but as video processors go, it's affordable. Especially if it means I can watch SD broadcasts again, which I just can't do now, it's that bad.
So I get the Algolith yesterday and run HDMI from cablebox to Algolith to TV. Fix a couple of setup issues, check the HDMI menu in the cable box and get it running properly. It worked as well as I had hoped. I had what I would consider great SD images...for about an hour. After about an hour, the image disappeared. The Algolith indicated no source input. I checked the connections and all were fine.
I checked the cable box setup menu and the HDMI menu had disappeared...completely removed...a blank space where HDMI used to be. I called the cable company and all they could say is "we don't support the HDMI/DVI connection". I've been using HDMI/DVI for over a year on both HDTV cable boxes, but an hour after I finally get a really good SDTV signal going to my TV, it just up and disappears.
I'm ready to cancel my cable service and try some satellite service. I've got about $1,500 and hours upon hours of research over the last 8 months to correct the crappy images that they couldn't fix, over and above the cost of cable service and equipment rental. Then when I finally get a good picture, they remove it. I mean they removed it, because the DVI menu on my other box has also been removed even though that box was off and hooked up to component video, anyway. Now, if they don't fix my HDMI connection, I'm stuck with a $1,000 Flea that only works with HDMI and no HDMI to feed it.
Sorry to chew your ears off, but it's one step forward, two steps back with everything I touch.