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I followed the guide to fixing the RROD on the Xbox 360. (created by Dr.Proffessor_Jake_Biggs). NEED HELP ASAP!!

Once I reached the end and done the heat test, I proceeded to the following steps and the heat sinks got very hot quickly.   I plugged the fans in and began to tension the screws correctly to erase the red ring of death.  Upon powering up again, the heat sinks will no longer heat up at all.  Where do I go from here?? Hopefully someone can point me in the right direction.  The crazy thing is, I just repaired my friends xbox last night and it worked 10 percent BETTER than perfect.  But now I can't figure out what the deal is with mine!! Please don't tell me that I'm probably just screwed! lol?