The volume and power buttons must both be repositioned in order to remove the motherboard.

To reposition the power and volume buttons, use the iFixit Opening Tool to pull the plastic casing upwards. Then, remove the casing completely.

Make sure that both the volume and the power buttons are free from the plastic casing before separating the motherboard from its case.

Be very careful when repositioning the volume buttons, since the fragile digitizer ribbon cable runs from the motherboard to the digitizer right next to the volume buttons. It is very easy to damage the ribbon cable while working in this area.