I'm not sure if reset is what you mean. Just under the power button is a reset button
Totally powering down and disconnecting power and other connections may help
Just below the reset button
Is a closed compartment that has sync button, I don't think you need to push that
Error code 51421 means that your wii wasn't able to connect to your router(Internet) ***The Internet Service for the Wii was stopped awhile ago, so you wont be able to connect.***
If you are trying to connect with a wireless router, This indicates a problem with your Wii communicating with your wireless router.
There are a couple things you can try/check to help fix this problem.
1 - Try using a different channel on your router and update your Wii to take to the router on that channel.
2 - If your router is using WEP (encryption), make sure your Wii is set to the same encryption.
3 - Make sure the MTU values on your router match those entered on your Wii.
Also note that if you make changes to your wireless router and you have a computer that uses that router too, you'll need to update your computer to match the new settings on your router.
do you mean the controller if so where you put the batteries in there should be a red button under the case covering the button and on the wii on the front where the power button is there should be a flap pull it to the side to reveal another red button take the wii controller and press both red buttons at the same time hold them at the same time for 5 seconds and the wii controller should blink then it should stay on and that means they are connected
Do you have a wireless router? If so you have to connect to it and it should work. If not you will have to hard wire your system with an RJ45 cable. ( ethernet ) adapter.
