Next, we remove the keyboard. This is the finicky bit that I'd failed to figure out before resorting to force.

At the top edge of the keyboard there are three little nibs on springs; these keep the keyboard in place. The images show where to find them.

Using a guitar pick (I had to dig out my very thinnest for this), push each nib back and insert the pick vertically to keep it back.

With two or three of the nibs pushed back it becomes possible to use the picks as levers and lift the keyboard out of the laptop.