I bricked my wii updating to 4.2 normally since I wanted to quit hacking, I called them and they said they would fix it for free and would replace everything, I also heard that they replace your serial number (as in most likely will give you a new wii) If you're banned on wifi by a MAC address only, and you send it in for repairs, when you get it back will you be unbanned, or will Nintendo unban the old MAC and ban the new MAC address I"m getting?
Since they can't really track my Wii's MAC address since I have just a "black screen of death" I just want to know if I'm going to get unbanned before sending it in, just so I know what to expect when (if) I get it back.
To begin with, I think you need to make sure you are banned. You do not get banned my playing online with backups, you get banned by using cheat codes.
Next, if they are replacing the Wii, then you'll probably be unbanned. Again if they're repairing it, there's a good possibility that you wouldn't be anymore.