Today I'll walk you through an easier way to fix the Red Ring of Death. This is commonly known as an X-clamp replacement because you replace the 2 x-shaped clamps holding the heat sinks onto the motherboard.
The theory behind this is that the clamps do not provide enough pressure to keep the heat sinks firmly attached to the board. Because of this, the heat causes the motherboard to warp and the CPU and GPU pull away from the board - causing the dreaded RRoD!
Here you see the underside of the motherboard along with the dreaded x-clamps in place! Remove them using the method I described in my disassembly tutorial.
Clean off the thermal paste on the CPU, GPU, and the two heat sinks. Rubbing alcohol works great for this.
Now gather your supplies! I'll link to all needed materials at the end of this post. You should have (at least) 16 washers and 8 screws.
Remove the "feet" from the heat sinks, these will be replaced with machine screws.
Reapply your thermal paste.
From the under side of the board, insert the 4 screws with 1 of the thinner nylon washers in between.
Place the thicker nylon washers on the top side of the board. The order from bottom to top should now be: Screw head, nylon washer, motherboard, nylon washer.
Lastly, place the appropriate heat sink on top of the screws. In this case I'm doing the CPU, so I'll use that heat sink. Make sure you put it on in the right direction!
Now apply pressure to both the bottom screws and the top of the heat sink and flip it over!
Using a screwdriver, screw the machine screws in LIGHTLY until they barely start to resist (it should be pretty much flat against the washer. Do this in a criss-cross pattern. Example: top-right screw then bottom-left screw, after that do top-left and bottom-right.
Once they are all BARELY tightened. Going around 1 more time in the same order and screw them in a quarter or half-turn.. until it feels snug. Do not over-tighten these! It could cause the RRoD to become worse!
Repeat this process with the other heat sink and your Xbox should look like this.
Plug in your A/V cable, power cable, and power button, and push the power button. Pray!
Success! If you still have the RRoD, try loosening and tightening your screws until it works. If this does not work for your 360, please refer to my heat gun tutorial - it is a much more thorough and permanent fix.
Amazon.com sells the supplies needed to perform this x-clamp repair at a great price... check out the link! If you need any help, don't hesitate to ask!
Until next time...