Instructions
Remove the nine Phillips-head screws from the back of the Nintendo DSi.
Lift the back of the DSi cover, tilting the cover toward the cartridge slot. Unplug the yellow ribbon cable from the motherboard. Continue lifting the back cover to separate it from the front half of the console.
Disconnect the old cartridge slot from the motherboard by flipping the four levers at each corner of the slot. Pull upward on the top of the slot housing to remove the component from the track.
Slide the replacement game slot into the track. Lock the slot into place by flipping the four levers at each corner.
Connect the yellow ribbon cable from the back of the case to the motherboard. Lower the back of the case onto the motherboard, making sure to line up all nine screw holes.
Replace the nine screws into the back of the case.