Gently pull the daughterboard up from the front center and open it like a hinge to the left exposing the ribbon.

Use the iFixit opening tool or tweezers to lift the black clamp holding the ribbon in. Align the iFixit opening tool with the ribbon, gently push under the clamp, and then pop it upwards.

The ribbon can be removed from either the daughterboard or the motherboard below.

Replace this daughterboard to fix the D-pad function.