3ds error that I don't know how to gix

So my dad has a 3ds that he said if I can fix it I can use it bur it's been hacked by his friend so he doesn't know how to fix it and it didn't have a sd card in it and it says "ab error has occurred:failed to apply 1 firm ware patch(es).press any button to power off.

When I boot it up while pressing start it says godmode 9