It sounds like the DTV guy may not understand the problem exactly, or just doesn't know. The 480i output is regular old garden-variety NTSC video, which is the same kind of video you have been seeing for 10 years on that set. Both the yellow video output and the S-video output should be available to any monitor that accepts NTSC baseband video.
I suspect a minor hookup snafu. But maybe not, there is a tiny chance your TV just doesn't like the NTSC output from the HR10. If you are feeling adventurous, get a VCR working with the TV set first, then input the HR10 into the VCR, and select "aux" or "video" on the VCR. Maybe it would work that way if there is some odd incompatibility. But I would check normal connections first.
My HR10-250 is currently connected to a non-HD 20" 640x480 LCD TV via component (480p). I also tried it at 480i with SVideo (looks about the same) and with composite (kinda blurry). So yes, it works with non-HD TVs just fine. You can adjust the output resolution with the remote or with the little button on the front of the HR10-250 box itself.
I used the included HDMI->DVI cable to connect the box to my 17" 1280x1024 Samsung LCD computer monitor. The picture was ok at 480p, a little squished at 720p, and really messed up at 1080i.
Speaking of cables, Kudos to DirecTV for including so many cables with the HR10-250!! Mine came with a stereo AV cable (composite), an SVideo cable, a component cable, an HDMI cable, and an HDMI->DVI cable. At BestBuy prices, that's over $120 worth of cables!!
A forum community dedicated to TiVo digital video recorder owners and enthusiasts. Come join the discussion about programming, streaming, content, schedules, home theaters, displays, models, reviews, accessories, classifieds, and more!