Just bought a new 50' Samsung plasma tv. Hooked up the 360 to the HDMI slot like i did with my previous TV but when I go to the HDMI screen on the TV it shows up as "No Signal" The Xbox is running just fine. Please help.
One thing I noticed was if you move the Xbox for any reason while it's running it'll lose the picture. I had the same problem, switch the cable sides (meaning moved the end in the tv to the xbox and vice versa) then set it up and it booted up fine. Try that.
But note everytime this happened the Xbox itself was giving me messages saying there was a connection problem, not the TV, so take this help for what it's worth.