All warnings from Part 1 still apply.

Press and hold [2nd] and [del].

Turn the calculator over; press and release the 'reset' button.

Keep holding down [2nd] and [del]!

If you did it correctly, you will see a 'Install OS now' screen. If you do not see this screen, try again.

Once you see this screen, you can release [2nd] and [del].