All right its finally happened, your Xbox 360 died on you and now all you get are the 3 flashing red lights. What do you do? Just follow these step by step instructions and its easily fixed.
Number one, unplug the power and AV cables and open your console. Do not forget to unplug the console…seriously.
Number two, disconnect your DVD drive and remove it from the chassis.
Number three, disconnect and remove your fan and fan shroud from the chassis.
Number four, lift out your circuit board from the chassis.
Number five, remove the x-clamps.
Number six, remove your heat sinks, the studs from the heat sinks and clean the thermal paste off of the CPU, GPU and heat sinks.
Number seven, put thermal paste on CPU and GPU.
Number eight, put the x-clamp kit screws and washers (these replace the x-clamps and studs) into the circuit board.
Number nine, screw the heat sinks in place with the x-clamp kit screws.
Number ten, put the circuit board back into the chassis.
Number eleven, connect the DVD drive and the fan. Do not snap the fan back in place yet. Place the fan face down (stickers down) with one fan over the CPU and one over the DVD drive. Reconnect the power and the AV cables. Turn on the Xbox 360 for 15 minutes and let it overheat. After 15 minutes turn the console off and let it cool down for 20 minutes. After 20 minutes turn the unit back on and you should be rewarded with green lights.
For full FREE down-loadable instructions and video links visit http://xbox360fixit.com Good luck and good gaming.