After taking out the three(3) screws, flip the laptop over so that the keyboard side is up.

Carefully lift speaker grille / button panel away from the upper case by pulling up on the two corners closest to the keyboard. If caution is not taken, permanent damage may occur.

Remove the center cable from its connector on the button panel. Then, gently release the friction locks that secure the left and right ribbon cables by pushing them away from their connectors. The ribbon cables will slip out of their connectors.