We need to remove the main circuit board. This needs to be approached with care.

The first photo indicates the three obvious screws. These would be easy to remove.

However, there is a another screw beneath the screen.

With a plastic spudger gently prise the screen up at the top edge, it is held in place by two foam sticky pads and tape. You may find a small amount of gentle heat will help release the glue, but be very careful to neither crack the screen nor damage the ribbon connector.

with the screen flipped forward onto the keyboard PCB, you can now remove the hidden screw indicated in the second photo.

You should now have enough movement in the PCB to remove the remaining screws in the plastic body beneath (see next step for details)