this looks like an okay thread to post what just happened to us, so here goes. this happened yesterday.
I using a back up computer at a realative's house. because of this.
fist what happened is he (my realative did this) accidentally, broke a fan blade off his proccessor fan, and it was very noisy, it shook the whole room, so we got a new processor fan, and went to put it on. but in the process of putting it on, the screw driver slipped, and he hit the mother board, but it didn't seem to do any damage, so when we were done, we plugged everything back in. The new processor fan worked great! but that was about all that worked.!
the hard drives weren't spinning, the moniter didn't start up, so we took the computer back out and noticed that is seems he knocked off this tiny little component from the mother board, and now, no computer for awhile.