How to Fix a USB Printer Device That's Not Recognized

Print a test page directly to the printer to make sure the printer is working properly. On most printers holding the power button for 5-10 seconds will start the test page printing.
Disconnect the USB cable from the printer and the computer. Turn the printer off and then reseat the cable on both ends. To reseat the cable, pull the square end of the USB cable out of the back of the printer, pull the flat end of the USB cable out of the USB slot on the computer, then firmly reattach both ends of the cable.
Power the printer back on and send a test page from your computer. To send the test page click on the 'Start' button and choose 'Control Panel' from the menu. Double-click the 'Printers and Faxes' icon and right click on the printer. Choose 'Properties' from the menu and click the 'Print test page' button.
Move the USB cable to another port on your computer if the test page still fails to print. If moving the cable does not work the USB cable will need to be replaced.