There are surface-mounted components next to the power button ZIF connector. Follow the instructions carefully to avoid dislodging them.

Insert the tip of a spudger under the right side of the power button ZIF connector's black locking tab.

Lift up the locking tab with the spudger to unlock it.

The locking tab should be nearly vertical when unlocked. If not, gently push the tab forward to compress the gel and completely unlock the tab.