i have two xbox 360's one has a modded heatsink. it has E73 error. the other one isn't modded and has 3 RROD can you help me out a bit. the modded one when i bought it it worked perfectly then my step-mom flicked the power on and off then it had RROD. the non modded one can prob be fixed easy its one of the first ones. help me out so i can sell them.