I am a MBP user experiencing what seems to be the same fan issues that I have read so much about. It seems like the problem of dying fans is pretty widespread and many logic boards and/or fans have been replaced. My question is this...is there any way to tell whether it is your logic board that is the problem or if it is just a bad/noisy fan? I am pretty familiar with the insides of my machine and have opened it up a couple of times for various upgrades, etc...and yesterday I opened it up when a fan died and was able to "resurrect" it but now it is acting noisy again. Anyway...I'm hoping the problem is just a faulty fan and not the logic board but I really don't know how to tell if it's the logic board. Anyone have any idea? Thanks.