If you have a microSD card installed, make sure to remove it before continuing.

With one hand, firmly secure your device.

With your free hand, lift the bottom edge of the motherboard and pull it towards the bottom of the chassis to remove it.

During reassembly:

With one hand, lift the top edge of your device so the actions buttons and D-Pad aren't touching your work surface.

Visually check that all the buttons are fully and properly in their recesses. If they aren't, they won't press correctly.

With your device lifted, use your free hand to slide the motherboard into place at a slight downward angle.

Make sure the bumper buttons near the upper corners go under the plastic bumpers and the ports along the top edge go into their cutouts.