Everytime I shut off my computer the fans rattle, that is the only time they do it. Should I be worried, they are not old either I replaced all six fans in my Aspire X-Superalien case. I fried all of them when cleaning out the system, I just held them to an air compressor and spun them so hard it messed up the bearings. So should I be worried, mind you they only rattle when I shut off the case then stop.
