I have a xbox 360. One morning I went to turn it on and I got RRoD.. "Error E74." This was my first time trying to take it apart and what not.. so I take it apart, brush off all the dust and residue.. and clean the chips where the old heat mats used to be.. I then re-applied thermal compound onto the chips and replaced the heat mats with 2 pennies wrapped in electrical tape. So I put my xbox back together, and fire it up. and It works. But the fans are super loud, and it will run for about two minutes and then shut off and give me 2 red rings. Any suggestions?