i have a nvidia 8600 gt and for some reason it wont show up in device manager at all so i inspected the hard ware every thing seemed ok but then i noticed the chip is a little high above the ball sockets so i tried a simple reflow method fired up the pc and it finally turned on but when i turned the pc off the next day it wouldnt show up any more the fan revs up and dosent stop whats wrong thanks in advance