I was surfing the internet tonight when my computer crashed. When I tried to turn it back on all I got was the dvd rom noise and nothing on the screen. I thought maybe it was the ram and took both chips out. Put chip A in the one ram slot with the other chip out. It booted fine. Put chip B in and no boot. Took chip A out and replaced with chip B and it booted fine. Both chips work fine but it seems the one ram slot is screwed up. It just happened out of the blue. any ideas?