The mouse and keyboard both work on another computer. I used the borrowed USB key and mouse and reinstalled the drivers, but did not that didn't fix the problem. There are no burn marks anywhere. I wish there was so I would at least know the answer. The FW and USB ports are all onboard along with PS2 port, except that the PS2 doesn't work. The MB is under warranty, but it's hard to tell if that is the problem. I'd much rather keep trying other solutions before I call Intel. Any ideas?