This guide is only intended to be used as a prerequisite for other guides. It's incomplete by itself.
Introduction
Prereq to remove the motherboard.
This guide involves removing the rear glass. Removing the rear glass destroys the adhesive holding it in place. Follow this guide to reinstall the rear glass.
Lift the camera-side end of the motherboard to separate it from the display frame.
You may need to move some of the ribbon cables out of the way while you lift the motherboard. If the board is hard to lift, check that it is fully disconnected and not caught on any ribbon cables.
Do not fully remove the motherboard yet—it is still attached to the daughterboard via a ribbon cable on the underside of the motherboard.