Remove the twelve 4.2 mm Phillips screws securing the LCD assembly to the rear display bezel.
Make sure you pay attention to how the microphone cable (and antenna cable on some models) are routed around the outside of the two screws at the bottom left and right corners of the screen. It's easy to damage the cables if not routed properly when reinstalling these screws. To see the cable routing more clearly, click on the photo and zoom in.
Raise the bottom edge of the LCD assembly slightly, then slide it down slightly to free its upper edge from a slight overhang in the rear display bezel.
Lift it out of the rear display bezel, minding any cables that may get caught.
When reinstalling the LCD assembly back into the rear display bezel, before you tighten down any of its frame mounting screws, make sure the short brass posts, one each on the left and right sides of the bezel, fit into their corresponding holes in the LCD assembly frame.
Be sure to keep track of the small magnet along the left side of the display. It may be stuck to the LCD frames or to the rear display bezel.
When the display lid is closed, this magnet comes in proximity to a sensor on a small circuit board at the bottom end of the I/O board, to tell the Macbook that the display has been closed, so that the Macbook can go into clamshell sleep mode.
To reinstall this magnet, press it back into its cavity in the rear display bezel, with its short side facing up (see photo 2), then place the LCD panel back into the rear display bezel and screw it down so that the magnet doesn't drop out and disappear.
