Remove wrist strap and battery.

Remove 2 screws from each side of the camera (4 total, 0.102 in).

Remove 2 screws from the bottom on the camera (0.138 in).

Gently pull off the front cover.

Gently pull off the back cover.

The cases should now be removed.

Use the spudger to disconnect the black tab.

Gently pull off the shutter button assembly.

Use the tweezers to disconnect the microphone cable.

The shutter button assembly should now be removed.

With the spudger, flip up the black tab on the main ribbon.

Gently pull straight out on the ribbon to disconnect it from the logic board.

By hand, gently unfold the function button board and lift it off the frame.

Congratulations! The function button board can now be replaced.