Unsnap the bezel at the button bar last. Do not try to lift the bezel up just yet.

The ribbon cable from the button bar still attaches the bezel to the monitor.

With the bezel loose, but still in place, turn the monitor upside down.

Lift the back cover of the monitor off and place it aside.

If the back does not come off easy, make sure that the front bezel is all the way unsnapped.