You could always try saying that it was a failed update, that could lead to a corrupt NAND.
You could say something like "My 3DS was stuck on update screen for over 10hrs so I just switched it off and got this error, HALP!" or something.
It's not like you have anything to lose, if they decide not to repair it you are not any worse off.
You could say something like "My 3DS was stuck on update screen for over 10hrs so I just switched it off and got this error, HALP!" or something.
It's not like you have anything to lose, if they decide not to repair it you are not any worse off.