This was a non-functioning keyboard, that was opened in order to expose the PCB.
Turn the keyboard over so you can see the warranty sticker.
Remove the rubber foot from the upper right keyboard stand to expose the machine screw. Then remove the screw.
Remove all of the keys to expose the 16 black self tapping screws then remove the screws.
Be sure to save the screws in one place. They are easy to lose.
Gently pry the casing away from they top to expose the PCB.