My boss wanted me to check on something odd. We just biult some new systems and he thought the usb ports were bad. He tried to use his san disk usb flash ram in the computers and they din;t detect. He has 3. He tried other devices and they worked. So I checked out 1 of them on 3 different systems and I got no response. Coudl he have somehow zapped them? Other devices did work. The frony usb was off maybe beacuse, the insternal back to front usb cable was reversed. Any thoghts?