Since I've bought my Xbox 250GB Slim the console seems to, over a period of time of gaming, display dashed lines and rainbow like effects on the display. Makes impossible to play, only remedy is to turn completely off and then back on again. I've sent the console off to Xbox to be repaired and they said they couldn't find a fault with it?
I think the console is overheating?
Here is a few pictures illustrating my problem: