Remove the four T-6 screws holding the daughterboard to the controller frame. Keep in mind this board holds all of the remaining buttons in place, so be careful none of them are lost when removing this.

Note: All of the buttons have clips surrounding them that prevent any of the buttons from being installed in the wrong place; be sure not to force any of them into a different location when reassembling the device.

When reassembling, do not force anything into place as this could indicate something has been installed improperly.

That's it! Hopefully this guide allowed you to access any components that need replacing.