Okay i had a xbox 360, 0lder model a 2006. It had a very loud fan, sounding like the fan was spinning up alot faster then normal but it wasnt red ringing, i tested it for over a hr no red ring just a loud quick spinning fan. Im trying to sell it and read online that the thermal compund probably went bad causing the fan to spin quicker figuring i could get more for it the better it sounded. So i took it all apart. took the x clamps off, cleaned most of the old thermal gunk off and put some new stuff on. used screws with 2 metal 1 nylon washer on the outside of the metal cage and 1 nylon washer on the inside inbetween the heat sink and motherboard, if i went anymore the screws wouldnt catch. put it all back together and now it red rings. is it possible i put too much thermal goop on it? what else would cause the red ring, ive taken apart plenty of xbox and never had this issue. i dont know what else to do. please help as i had buyers set up for this week, thanks.