Error Codes 51420 - 51422
The Wii console is not able to connect to your wired router or modem.
1. Make sure that you are using the Wii LAN Adapter made by Nintendo (click here for a picture and connection steps). LAN adapters not made by Nintendo likely will not work with the Wii console.
2. Ensure that the Wii LAN Adapter setup is correct, and that the Wii LAN Adapter was connected with the console turned off. For step by step connection instructions, please click here.
3. Check to see if the ethernet cable you are using is not working properly, by connecting another ethernet cable from your router/modem to the Wii LAN Adapter. If the connection works using a different cable, then the problem was with the first cable.
4. If possible, try another Wii LAN Adapter. If you are unable to try another Wii LAN Adapter, or are still receiving this error code, please call 1-800-255-3700 for assistance.