Casio CTK-501 Keys Replacement

Flip the keyboard upside down so the bottom is angled towards you.

Use a #2 Phillips screwdriver to remove the twenty-seven 12 mm screws from the dark gray bottom panel.

Remove the bottom panel by lifting the bottom panel up and outward from yourself.

Flip the top half of the keyboard and set onto the bottom half with the internal parts facing up.

Completely unscrew and remove the screws holding the broken string of keys in place.

Pull up the top layer of white keys to remove them from the keyboard.

Pull up on the last layer of white keys to remove them.

Push the black keys toward the front of the keyboard and rotate them until they fall out of the keyboard.

Replace the group of broken keys with new ones and screw all of the keys back in place.