Use your fingernail or the edge of a plastic opening tool to flip up the retaining flap on the following three ZIF sockets:

Lower touchscreen cable

Lower LCD cable

Power board cable

Be sure you are prying up on the hinged retaining flaps, not the sockets themselves.

After flipping up the locking tabs on all three sockets, use your fingers or a pair of tweezers to gently pull the cables straight out of their sockets.