How to Repair a Wii When it Will Not Power Up
Updated September 22, 2017
If your Wii will not power up, you try simple repair before you send the console in to Nintendo to repair. Nintendo designed the AC adapter with a protection mechanism against a power loss or surge. Even if the Wii was connected to a power strip, the mechanism may be triggered beccause it is very sensitive to voltage change.
Unplug all the cords from the Wii console. This includes the AC adapter, the light bar and the output cord to your TV or monitor. Also if you have any Gamecube cords or memory cartridges plugged in, go ahead and disconnect these too.
Unplug the AC adapter from the outlet (power end). Wait at least two minutes. Without any power in the AC adapter, it is designed to reset to allow DC power to flow through to the console.
Plug only the AC adapter back into the back of the Wii. Plug the cord into the wall. See if powers up by pushing the power button to see if the light turns green.
Turn the unit off Plug in your monitor or TV cord. Turn the Wii console back on. If the power stays on, then continue to the next step. If the power trips back off, there is an issue with your TV cord or more likely you are getting electrical feedback from your TV or monitor. If this is the case, try a different TV or monitor.
Plug in each of the remaining items into the Wii console one by one. Check to see if the power trips back off. If any of the accessory items trip the power off consider replacing the accessory. If you have no other problems, it was probably a power surge or power loss that caused your Wii to not power up.
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