<human>: I need your help REDDIT!!!
I've had my XBOX 360 for a couple of years now and I bought a fan for it also because there was a huge "Red Ring of Death" when I bough it.
Recently I was playing Mass Effect 1 (wanted to go through the first 2 games before the thirsd one came out), well the screen was working fine and everything when out of the blue it goes flickering green. You could still see the screen to an extent but it was very green. So I shut it down and started it up again, unplugging and plugging in the HDMI wire, the dashboard screen was fine so I though problem fixed and started playing again. Well a couple of minutes into the game same flickerign green screen comes up; so I repeat the whole shut down and turn on procedure again and again after a couple of minetes in the game same screen.
After a couple of tries I gave up and put in Modern Warfare 3 in to play. The dashboard screen was fine and everything was good, so I thought the it was maybe just the CD for Mass Effect was defective. So I go to Multiplayer, XBOX LIVE, find a match and loads the game; all the while the screen is perfect. Well a couple of minutes into the game, the screen goes fuzzy, with certain parts pixelated (not green screen this time though). I play on hoping it will go away because the I could still see enough to play; was difficult at points because an enemy would at points be pixelated so I couldn't really see who shooting me.
Well the game ended and in the post game lobby the screen went back to being perfectly normal, no flickering or pixelation.
This went on a couple of times to the point that it became apparent that the screen only flickered and pixelated during the game not in the dashboard or the pre game or post game lobby.

Condense the text into a few key points
<bot>: Screen becomes pixelated and flickers only when in the middle of a match in MW3; when in lobby or dashboard or anywhere else screen is fine.