I had just gotten a microsoft HDMI cable to upgrade my xbox 360 from the old Green, Blue, and Red prongs. I have been using it for about a week, and it has worked great. But last time i tried to get on to my xbox, my controller wouldnt connect. Everytime i try to resync it the system and controller just flash and it wont assign the controller a spot. Also, becuase of the new HDMI cable, the screen wont even turn on untill a controller has been connected :\ I tried everything from turning off my tv, because i hear that can block the signal of the controller; i unplugged everything including the hardrive and put them all back in with no luck, but THEN I unplugged my HDMI cable and used my old 3 prong cable and it CONNECTED!!! I assume the cable is the cause of the problem then, but WHY? I have been using it just fine for the past few days. Has it gone bad? Is it interfereing? Is it becuase i had my ps3 and xbox on at the same time becuase thier right next to eachother? HELP!!! and thank you in advance for any advice you give me (and the others reading this becuase thier are ALOT of people who seem to have this problem).