When first connecting the Dell to the usb port did you enable usb keyboard in the bios with the power on with usb keyboard or mouse option? That shouldn't stop a PS2 model from working normally since that only enables the option to use the usb type. The first thought is the PS2 connector now has some play in it. Upon initially buying an MS PS2/usb combo mouse the connector saw a little bump when sliding the case back in. From that time on the PS2 connector was left off even now on a new board. Examine that closely to see if that got stretched a little.
|