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    Unknown Device shown in device manager - scanner


    Unplug scanner, plug into different USB socket (not monitor)

    Try scanner on another PC (does it work there? scanner probably not broken)

    Bring working scanner to original PC where non-working one was (with the working USB Cable)

         Working scanner still working

            Try it here with the cable from the non-working scanner

                     Working? re-plug in non-working scanner back call CDP

                     Not working? could be a bad USB cable

         Working scanner does not work here - possible issue with the USB port, try another usb port.


    If unknown device is present no matter which PC the scanner is connected to - then it may need repair.




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