I took apart my mac mini yesterday to replace the hard drive with a bigger one. After an unsuccessful attempt, I replaced the original one and put it back together. Now I think it's overheating somehow. I'm pretty sure the fan is reconnected because i can hear it going LOUDER than it's ever gone before, and periodically the screen will go blank and the LED will blink once, then everything will come back. I'm not doing anything very intensive, and i CANNOT figure out what's wrong. Any thoughts? I really don't want to burn out this computer, considering that now I'm pretty sure my warranty is probably voided due to the fact that I attempted to replace the hard drive. Thanks for your help (I'm shutting this down for a little while). ..emi oh, btw, my AC is on in my room so it's nice and cool in here.