iFixit

Use the flat end of a spudger or your fingernail to flip up the retaining flap on the camera ribbon cable ZIF socket.

Be sure you are prying up on the hinged retaining flap, not the socket itself.

Remove seven Phillips screws securing the motherboard to the upper case:

• Four 2.5 mm gold screws
• Two 3.5 mm black screws
• One 2.5 mm silver screw

Lift the side of the motherboard that sits along the bottom edge of the 3DS.

Continue lifting the motherboard assembly and rotate it until it is resting next to the rest of the device.

Use the flat end of a spudger or your fingernail to flip up the retaining flap on the LCD ribbon cable ZIF socket.

Be sure you are prying up on the hinged retaining flap, not the socket itself.

Remove the motherboard assembly from the rest of the device.

Peel the black silicone cover off the back of the D-pad.

Open the 3DS and orient it so that the bottoms of the buttons are facing upward.

Use your finger to push the D-pad through its hole in the upper case.

Remove the D-pad.