Can Replay Video transmit through HDMI?

First, I know there might have been something written in this forum on this subject previously, but I cannot currently search the word HDMI as there seems to be some sort of update/upgrade going on with this forums server right now...

The short question is: has anyone had success connecting their Replay audio and video output through a home theater sound system using an HDMI output from the sound system to the TV?

I'm hooking up a Sony DAV-X1 Home Theater to a new 1080P DLP HDTV. I have connected the DAV-X1 unit using HDMI to my TV. I have also connected a Replay 5080 DVR to the DAV-X1 Video 1 input using S-Video known good cables. The output should then be handled by the HDMI connection from the home theater to the TV, I presumed. The problem is that although the Replay audio can be heard through the DAV-X1, the video itself is blank. By the way, I've not upgraded to HD cable, still using my Comcast digital cable box. I have tried to change the progressive signal on the DAV-X1, but no video comes through for the Replay regardless of which setting I use. Incidentally, when the DAV-X1 is set to the DVD mode, the picture comes through using HDMI on the Mitsubishi TV, so I know the HDMI connection is working. When I connect the Replay directly to input 1 of the TV the Replay audio and Video work through the TV, so I know my Replay and its cables are working. Any insights as to why the Replay's video signal will not transmit to the TV via the DAV-X1 using the HDMI cable?
I suppose I could just connect the Replay directly to one of the TV's inputs, and then just use the TV's audio output connection to the DAV-X1 to hear it through the home theater. Still, why have multiple inputs into the home theater if the device connected can't relay it's video output through HDMI? Also, wouldn't I be sacrificing visual and audio quality by not going through HDMI?

Thanks. I also couldn't find the info I wanted through my web search. I emailed my question to Sony, and here's the response I got:

Thank you for contacting Sony Online Support.

We are sorry, but the issues you describe will require more
communication than can be effectively handled via e-mail. Please contact our
Customer Information Service Center by phone. This will allow our telephone
technicians to diagnose your issue further. They may be reached at the
following: (800) 222-7669.

Thank you for the opportunity to be of assistance.

Your Sony Email Response Team
Jacob

I post this email response for anyone who could never find the 800 support number for Sony! It's useful. I did call Sony, and they said that the DAV-X1 has a monitor out for video. So it seems that the HDMI is really useful for the DVD player. The S-video output will be handled by the Monitor S-video out feed. I already hooked the replay directly to the TV and have the TV audio out feeding to the DAV-X1. I'm not sure there would be anything to gain from moving the Replay back to the video 1 input of the DAV-X1. There might be some benefit to the sound quality...

Yes, that's what I've ultimately discovered. Also resolved that it would be better to rehook the Replay back to the sound system directly instead of to the TV then fed back to the sound system via the audio out jacks on the TV. There's a potential to lose dolby sound quality feeding through the TV first.

I found a helpful, interesting description of HDMI online. It's the connection wave of the future:

HDMI (High-Definition Multimedia Interface) is a connection standard that was first developed by Hitachi, Panasonic, RCA, Silicon Image, Sony, and Toshiba in 2002. HDMI is quickly emerging as the connection standard for HDTV in the consumer electronics market.

HDMI is the first and only digital interface that is able to combine uncompressed audio and video over a single cable. Possessing a bandwidth of 5 Gbps, transmissions over HDMI are currently using less than half of that. This leaves plenty of room to expand the technology in the future.

HDMI is fully backwards compatible with DVI, and will supplant it as the interface of choice over the next few years.

I should point out that one of my main objectives when I purchased the Sony DAV-X1 was to aquire a new technology unit that projected surround sound without having to set up 5 speakers. I know this technology isn't perfect. My research showed that Yamaha was likely the best for this type of unit on the market, utilizing one long box with numerous speakers and drivers inside. But the Yamaha did not come with a subwoofer. You had to purchase that separately. Next, I looked at the Bose 321, which has outstanding sound quality as well, but it is plagued with a cheap receiver unit...the DVD breaks down easily, and it cannot play HD DVD's. This Sony, however, displayed an impressive surround sound with only two speakers (and a subwoofer which came with the unit) and can play HD DVD's too, as an added benefit to my new HDTV.

Overall, I'm very happy with my choice, as it was half the price of the Yamaha and Bose system when purchased online at Curcuit City.

Yes, you're correct, the DAV-X1 upconverts standard def DVD to HD resolution (not HD-DVD). The Bose 321 has a DVD player, but it doesn't upconvert DVD to HD Res.

Please elaborate...same league as what?