Instructions
Unplug the Wii AC adapter from the wall outlet.
Disconnect the other end of the Wii AC adapter from the Wii console.
Unplug any USB devices from the Wii USB ports.
Plug the Wii AC adapter back into the wall outlet after leaving it unplugged for two full minutes. Do not plug the AC adapter into a surge or power strip. Instead, plug it directly into a wall outlet, Nintendo.com advises.