iFixit

Support the display with your free hand removing the following screws.

Remove the single Phillips screw on the outer edge of either hinge (two screws total).

Tilt the display back to get over two small nubbins, and then slide it directly from the case and away.

Remove the following 9 screws:

• Two 3 mm Phillips from the edge of the logic board, near the battery
• Two 4 mm large head Phillips on the port side, from either corner.
• One 6 mm Phillips near the sleep light.
• Two 7.5 mm Phillips securing the battery connector to the metal framework.
• Two 5 mm Phillips from the logic board. These screws may not be present on some models.

There will be two screws remaining that secure the airport card cage to the logic board (can't get them all).