I had recently took my 360 apart to find out what drive I had. Upon putting it back together I received error code 0011 (2 lights lit 1 and 3), over heating problem. As it turns out the tutorial I used to take it apart show to remove all the screws (including the heatsink screws) took it back apart and made sure the heatsink scrwes were really tight and now it works fine. I hope this helps out a few of you.
PS I want to thank everyone of you, who contribute in anyway, wether coding, reversing, or posting, and especially to XBOX-SCENE. be cool and happy hacking, Pasqually.