It says in the service manual you should rotate two screws at the bottom of the screen.
I try to rotate what appears to be screw covers with no success. It is very hard and slippery. Maybe they are really screw covers and should be removed?
While I have not done it myself, the screws as seen in the parts figures are not threaded but keyed. Since they depend upon gravity to drop down, they could be simply stuck and once in the proper release orientation be pried downward with a spudger.