Just this morning, I was about to play my Guitar Hero on my Wii. When I turned the Wii on, a black screen appeared with the words Now Repairing. Do Not Turn Off. I did not power off my Wii for 30 minutes because I was afraid that the system might crash. I opened my laptop and I searched on Google. Thankfully, I found out on one website that this was an April Fool's Day joke on Wii. You just push the A button, and the preloader screen will appear. Press System Menu,
and then after that you will be led to the normal screen.