Place the upper casing on edge and use a spudger to push the keyboard away from the casing, poking the spudger through the holes where the screws were.

Lay the casing flat so that the keyboard faces up and and slowly pry the keyboard up, beginning at the back edge along the 'F' keys, and moving toward the space bar.

Turn the casing over and work the grey keyboard ribbon through the slot.

Turn the casing back over and pull the freed keyboard directly up, minding the cable as it slides through the slot in the casing.