I've been using my MOdel 990 with an OPPO DVD player with no problems--using the HDMI with DVI converter for video and the optical output from audio.

Sad to say, the OPPO developed a mechanical problem, so needed replacing.

I have now tried three different DVD players, of two brands (Sony and Samsung), using the same connections as with the OPPO and had the same problem with all three: The 990 apparently can't detect what kind of signal it is getting from the digital input (the word "digital" keeps flashing on the display face), and I get only a faint sound, and only through the center channel.

Now I'm using a new Sony DVP-NS700H. I'm sure I have the right setup options chosen--I spent half an hour on the phone with Sony--and Sony says there should be no problem with using the HDMI/DVI with the optical output. But the same thing is happening. (Just to be sure I hadn't broken anything, I put the OPPO back in the system, and its audio works just fine.)

Any ideas?

Thanks.