I have the new 360 slimline 250GB HDD and have recently bought a HD tv to use with it. Often when i turn the xbox on, the tv will say no signal, the the green ring on the xbox will just repeatedly flash, until eventually it turns off by itself. I don't know if the problem is with the console, the tv, or the HDMI cable. I have warranty on the xbox so if that needed repairing or replacing it wouldn't be too much of a problem. I just need someone to point me in the right direction as I have no idea what is wrong. Thanks.