After all of the inside latches have been dislodged, remove the front cover. Now is a good time to clean the dust that collects in the device after prolonged use.
Use Phillips JIS J00 screwdriver to undo the screws that attach the motherboard to the back cover.
Again, make sure to apply only a gentle pressure when undoing the screws.
Be very careful: If the metal head of the screwdriver slips during the process, it can damage the motherboard. While not relevant in case of removing a broken motherboard, it is crucial while putting in a new one.