Ok, here goes.

My tv is a Mitsubishi WS-65311. The back panel has the following 3 HD inputs:

first input: "DTV(YPBPR/GBRH V) 480i/480p/1080i"
2nd and 3rd input: "COMPONENT 480i/480p/1080i"

I have my HDTV Cable box hooked up the the DTV input (first input) and my progressive scan DVD player hooked upt to the 2nd input. I have tried interchanging these just to see what happens and it doesn't work. I guess there is two kinds of component in?

My reciever is a digital Panasonic, SA-XR57. It has 1 HDMI input and 2 component input. I read the manual and it cannot convert.

My video card is a Radeon 300 series with DVI, VGA, and S-Video output. Currently the VGA goes to my computer monitor and the S-Video goes to my big screen tv, leaving the DVI available.

doormat posted a link to the specs on my video card earlier in this thread. I tried copying that here, but it didn't work.