Hmm, well a google search found
this.
quote:
Originally posted by site
Symptoms of the defect include the screen blacking out, with white dots appearing all over it. Some posters also report that green shadows plague their television displays (one of the common signs of video card failure). The audio, they claim, remains unaffected.
If it's a hardware issue they'll replace your xbox for you. Just hope you don't get same problem as Patchou