For US residents they offer a free charge repair if your console isn't modded.
Some of you have reported problems with your Wii console after updating to the Wii System Menu 4.2. The symptoms most people are describing usually occur when the Wii has been modified. However, some of you also mention your system has never been modified.
We'd like to help get your system working properly again. If you're experiencing problems with your Wii console after downloading Wii System Menu 4.2, and you believe your system has not been modified, please give us a call. If we find that you have a normal system and the update caused your system to not work, we'll repair it at no charge.
Please call our Customer Service Department at your earliest convenience, 1-800-255-3700. We are open 6 AM to 7 PM, Pacific Time, 7 days a week. - NoA tech forums statement
http://www.gonintendo.com/viewstory.php?id=98891#comment-section
Good luck for the rest of America I guess.
