Repeat the same process as in Step 6 to release the flat ribbon cable from the black rectangular latch

Unscrew the six black 3.0 mm Phillips #00 screws that hold the black motherboard on.

Release the clip at the bottom left corner of the black motherboard by pinching the wings at either side of the clip.

Be sure that the transparent case or the black motherboard are being held or resting on a surface so that neither falls when the clip is released.