Step 19
Lift up the left side of the logic board and disconnect the multi-colored power connector from the bottom of the board.
Step 20
Grasp the logic board at the left side and at the thin section near the right fan, and rotate the logic board out of the lower case.
Step 21
If the right speaker assembly remains attached to the logic board, hold the logic board with one hand and slide the speaker up slightly to free it from the logic board.