Sorry if this is in the wrong section.
My 360 has always been connected through HDMI lead to my television, but all of a sudden i'm getting no picture whatsoever.
I put my 360 on an hour ago to watch some of my television programmes from my external hdd, everything loaded up fine. But i did notice the picture wasn't as crisp as it usually is an also noticed there wasn't any sound.
So i thought the lead must be out a little so took it out of the back of the television an re-inserted it then did the same with the 360. Now i have no picture or sound just a black screen.
I tried changing the HDMI wire with my Sky+HD wire same result, i tried the first HDMI lead in the Sky+HD box that worked fine, so it's not the leads in my opinion.
The 360 works with the old AV cable but i can't select hdtv settings in system/settings as they are greyed out so i'm stumped at what to do.
Any help/advice would be great.