My Xbox refuses to do HD output. I am using the Energizer Universal HD component cables because my HDTV is an older model and doesn't have HDMI. There is nothing wrong with the cables because they display HD on my PS3 (tested after Xbox wouldn't display), and it will display the standard definition on my Xbox through these cables.
I did the Y+RT reset to no prevail. And while these HD components are plugged in, I can plug in the yellow/standard, change the input and the Xbox displays there. It's like it's not even picking up I have the HD cables in at all. They just worked fine yesterday, so I don't understand. And this shouldn't make any difference, but I had it hooked up to a different TV yesterday, but the same exact model as mine.
I am using the Slim 250gb model.