Today I pulled out my xbox for the first time in a while to play the new Mortal Kombat, and it of courses needs updating. It was not currently hooked up to the internet, but I still selected "update". I instantly lost visual, but I did not lose audio. This was using analog plugs rather than hdmi. I restarted the xbox, and continue to have audio but still no video.
I had a 1.3b hdmi cable laying around, so I decided maybe it was time to switch to hdmi. I tried this with no avail, completely lacking audio or visual, and my television was no longer picking up a signal.
After that I switched to my PC monitor using hdmi, but it still does not pick up a signal from my xbox.
I have had trouble with screen discoloration and ghosting before, but normally it would go away when I turned off my xbox for a while and came back later.
Please help =(