Last night while playing Quake 4 on my 360 the screen started to flicker, it did it twice and then the screen went black.  I can hear the console startup but get no display or red ring.
I've just ordered an x-clamp kit of Ebay and hopefully that should fix it otherwise it might be a new 360 for me.  Worst still Saboteur arrived this morning just to rub it in.

Happened to my launch 360 after a year of use. I got one of the fugly green special edition ones the next day. Hey, I was desperate.

Yeah that sucks.  My second 360 died two hours into red faction (although I am glad it died because microsoft gave me a shit launch console that never worked right to begin with).

Hah, you know why they called it the Xbox 360?  Cause it's 3shitty!  Get it?   
 
Hehe, haha, hoho.

Funny picture. I respectfully disagree though.

My 360 hasn't died on my yet, but then again it's one of the newer ones. Bought it last April.