Sigh..after 1 and a half years i finally got it...
On my Xbox360
It started while i was playin Forza Motosport 2
I was playin when all of a sudden the game froze...nothing moved...sound stopped.
So i restarted my Xbox360 then it froze...AGAIN..
So i restarted again................Then the screen was COMPLETELY green!
This time i switched off the Xbox360 and tried to switch it on.
Then...
So most likely i will send it to the shop to repair or sumthin...