Step 25
Remove the two silver T6 Torx screws from the top left and bottom right corners of the left speaker assembly.
The magnet in the MagSafe connector may pull the upper screw towards it after the screw has been freed.
Step 26
Lift up on the left speaker assembly and rotate it slightly. It is not possible to entirely remove the speaker yet, as it is still connected to the left I/O board beneath.
Step 27
Disconnect the two cables securing the left speaker to the I/O board.