Sorry if this is the wrong place but I'm new here.
For the longest time I played on a large HDTV then I ordered adapters to be able to play on my computer monitor which is much easier for system link with my friends.
I got the following to use my Xbox with the monitor:
Optical/Red White adapter
HDMI to DVI adapter
Red White to Computer Speaker adapter
The Xbox connected just fine until I played on the monitor for a couple weeks. Next thing I know I try to plug the xbox into my HDTV again and it doesn't work via HDMI!? It still works using the component cables(red, white, yellow), but it works on no HDTVs using HDMI. I have tried multiple and my friends' xboxes have used my tvs so I know my Xbox is the problem. I've tried resetting the display settings and changing different settings but NOTHING will work. Does anyone have a solution? I am bewildered because the Xbox uses HDMI to work with the monitor.
Some more stuff:
Xbox is 360 Elite with 120gb hard drive
Monitor is Samsung EX220
HDTV is Panasonic viera of some sort