Hey guys, this may not be the right place at all to post for help, but i'm a little miffed... oh my desktop pc, i tried to replace the videocard fan. after this and that hacking inside the computer, i plug it in, and at first it begins to run, but nothing happens... i unplug it, try again, and nothing happens at all. did i somehow damage the motherboard or some other part working on it? could it be the power supply? how to i begin diagnosing it? thanks, r.