Hey guys, last night (the day my one-year standard hardware support ended) I upgraded my 250gb stock HDD in my iMac to a 1TB WD Caviar Black. Now that everything's put back together (except for the microphone, that damn thing is so tricky when putting the housing back on! kept getting in the way so I just decided to disconnect it), the optical fan is not working. I see that in SMCFanControl it's "running" at 0rpm. So, I'm guessing it's just some cable that I disconnected and that it's an easy fix - but maybe that's not the case.. Anyone here that is familiar with the interior of an Aluminum iMac (20" btw) able to provide some insight on this please? Thanks! BTW, I should note that, in one of the fans (didn't pay attention whether it was the ODD fan), I accidentally dropped two tiny screws in. Of course, they did not drop in the inside of the fan where things were spinning, however. The screws that I dropped in were screws that were meant to tighten one of the display connections. Here's a picture of the fan I'm talking about: Above the fan is the optical drive. So, I'm guessing it is the ODD fan, lol.