I already called Nintendo Support, and they're going to send me a new power cord to see if that's the problem first. (my order # is 4979311 so I don't forget)
If it's not, I get to call them back and set up a repair. :(
I think I'ma see if Gamestop has a spare cable. The one near me is supposed to... Just so I don't have to wait 7-10 business days. :|
Of course, I hadn't wanted to play Mario Galaxy until the Wii wouldn't work. :|