I play Crysis in 1080p with HDMI and the screen keeps going black from time to time for about 2 seconds, then comes back. At first the game would freeze completely, but after i cleared my cache, it stopped freezing and started just going black for about 2 seconds. I changed the HDMI settings on the xbox to disabled so that it would automatically pick the HDMI and it didnt seem to change anything.
I also tried it on a different TV, with a different wire and it still happens. This is the only game that does this to me. At this point, its either the game or the xbox, and i have a Halo Reach type S xbox.