Where is key bd lock screw

Hi! Between F5 and F6 you will see a small square piece of plastic. If you look closely at this, this is a sort of round dial within the square, and that has a flathead screwdriver notch in it. Use a small screwdriver to turn this, and the lock level just above it will go up and down. When it's in the down position, the keyboard can be removed. Please note, you'll also need to push down the spring-loaded tabs which are between ESC and F1, and F11 and F12. It works best to press down the one between ESC and F1 while simultaneously pulling the keyboard out from the upper-left edge, and then press down the other one once the keyboard is mostly out.