My mates PC stopped working after a power surge, everything else worked and after days it still wasnt working. Then her dad (electrical engineer) called and told her to disconnect all the wires, check the outlet (which youve done) and after connecting it again it started working...weirdest thing ever :S You tried disconnecting the power cable and reconnecting? Slim chance but still...
Yeah - Nintendo's waranty for the Wii is 1 year. If you register it online at Nintendo.com then it becomes 1 year + 3 months.
You might just want to call up Nintendo and talk to them about getting a new one. Yours seems to have bit the dust.
Buy BWii Thread