hello, i have a dell studio 1747. on the system i only have 2 usb ports on the right side. the one towards the front works fine but the one at the back will not recognize anything plugged into it. it will supply power to things i.e. usb powered cooling fan. also i know that the mouse is receiving power because the leds on it light up but the system never loads it for use. i have tried to uninstall the 2 usb root hubs and it still wouldn't work. the usb ports on this system are not mounted directly to the board so i replaced the port thinking maybe the pins broke from the solder or something. no luck there either. i just did a full system wipe and restore, and still no system response from the port.