Well technically speaking fixing a RROD is pretty easy it requires some understanding of hardware (if you have installed a video card or built a PC you are good to go) the right tools (nothing complex) and it takes about 15 minutes to do it (newcomers might take longer just to take the 360 apart XD )
If you are going to do it I recommend you looking for the cooling mods that will vastly help including: the fan replacement, the extra fan, the modified air tunnel, the X-Clamp modification etc.
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