How to Replace the USB Board Before you begin: Remove the base enclosure and battery. Removal Disconnect the USB board ribbon cable from the ZIF connector on the USB board. Remove the two 3 mm P1 Phillips-head screws that secure the USB board to the top cover. Lift the USB board off of its alignment pins and remove. Replacement Place the USB board into position on the top cover. Replace the two 3 mm P1 Phillips-head screws that secure the USB board to the top cover. Insert the USB board ribbon cable into the USB board ZIF connector and press the locking bar down to lock the cable into place.