I had the same problem, I had my master code on and my AR v1.1 codes on and pushed select and it froze right after the Nintendo screen or before..
What you need to do to fix this is download AR code manger onto your Windows computer or laptop then click subscriptions and look for your games and drag em to your play list and click the comment button, but I suggest you delete all your games, on your play list for it to fully refresh the AR memory system before you start adding games then close out, if I told you wrong get your manuel XD