oh man, well, first, i THOUGHT my drive was making a funny noise so i figured i better get a new one "some day" well, i zapped the pRam and all the sudden my drive didnt work anymore. when i would try to start up the computer i would get the dreadful folder icon with a question mark. NOTHING worked. so i got a new drive and everthing was fine. THEN i started hearing that sound again, that funny noise which i originaly thought was the drive...but now it seems like that sound might have been the FAN the hole time. so now i think i need to replace the fan...is that possible? and to top it off. after replacing the drive and STILL hearing that funny noise (which i can only guess is the fan), i zapped the pRam again because i heard that it could help with excessive fan use, my computer wont start up normally. i have to start up with the option key pressed down and choose a start up disk manually. anyway, why would zapping pRam cause my first disk to die, my second disk to not be recognized as the start up disk and lastely how can i check to see if its my fan making the noise and can i replace it myself. system: tibook 667 Mac OSX (rocks).