How to Replace the IR Sensor Board Before you begin: Remove the base enclosure, wireless WAN module if installed, battery, M.2 solid state drive and system board. Removal Peel the IR sensor board ribbon cable away from the top cover. Remove the two P00 Phillips-head screws that secure the IR sensor board to the top cover. Lift the IR sensor board off the alignment pins on the top cover and remove. Replacement Place the IR sensor board onto its alignment pins on the top cover. Replace the two P00 Phillips-head screws that secure the IR sensor board to the top cover. Press down on the IR sensor ribbon cable to reattach it to the top cover.