Hey guys, was searching for help with my DN1000 when I came across this thread. I am not sure my problem specifically relates to the OP, but it sounds like it could be similar to problems others have had.
I have an older HDTV from Toshiba that maxes at 1080i and has HDMI input.
I have a recently homebrewed HTPC and a Comcast cable box.
My cable box only has component out, so I connected it to the Video 1 inputs on the receiver, and ran HDMI out from the receiver to the TV. After a few false starts, I got everything working correctly, and had video on TV and sound from the speakers. I was able to enter the GUI menu and change a few settings. Then, I connected the HTPC to the receiver via HDMI to the HDMI 1 input. I swapped the receiver to the HDMI 1 and was able to load up Windows Media Center with everything working. I began playback of a DVD to test surround sound. It did not come on automatically, so I figured I would go into the GUI to setup playback. That was a mistake.
Then moment I hit the GUI menu button on the remote, the TV began to flash green and black. I backed out of the GUI and nothing changed. I stopped the DVD playback, and was able to see my HTPC desktop once again. However, when I would try to play the DVD, the picture would be completely scrambled. When I would switch back to the component inputs from my cable box, it would flash green and black again. Nothing I could do would bring the GUI up anymore, and no amount of resetting the receiver could fix it. I am going to try and reconfigure everything again this evening, but does anyone know what could be causing this issue or what I should try that has a high likelihood of fixing it?