http://www.nintendo.com/consumer/systems/wii/en_na/ts/power.jsp#no_powerNo Power
1. Make sure that the word "Wii" and the model number "RVL-002 (USA)" molded into the AC adapter. Unlicensed products are not fully compatible and may not work correctly.
2. Avoid the use of unlicensed products such as memory cards, controllers, and cheat devices. Some of these products are poorly manufactured and may result in damage to your system. If one of these products is attached to your system, remove it and try resetting the AC Adapter (see below).
3. Check all accessories, licensed or not, for phsyical damage. Physical damage, such as frayed wiring or a cracked housing can cause the system to shut down. Remove any damaged products and try resetting the AC Adapter (see below).
4. Make sure the Wii has good ventilation. Avoid operating the Wii while it's on carpeting or inside an enclosed space. If you have the Wii placed in a vertical position, make sure the vent on the bottom is lined up properly with the hole in the plastic stand and no foreign material is obstructing that hole.
5. Check the vents on the back and side of the Wii for dust build up. The system will shut down if it cannot vent properly to prevent overheating. If there is a build-up, remove it using a vaccum cleaner with a soft brush attachment.
6. Make sure that your wall outlet works. To check it, try plugging a lamp into the same outlet where your system was plugged in. Turn the lamp on the verify the outlet works. Also, make sure you are not using an outlet that is operated from a wall switch. If you do, make sure the wall switch is in the ON position.
7. Make sure the AC adapter is attached properly. Firmly plug your AC adapter into the back of the Wii (the port is labeled 12V IN) and into a working wall outlet. Click here for detailed instructions.
8. Once plugged in, check the power light on the Power button to see if the system is receiving power.
If this fails, try resetting the AC adapter.
1. Unplug/remove all accessories from the system (including game discs, SD Cards, memory cards, Nintendo GameCube controllers, hookup cables, the AC Adapter, and Sensor Bar) from the outlet and Wii.
2. Let the system rest for about 90 seconds. While you're waiting, check to see that controller cords, AC Adapter, and Stereo AV cables/Component Video cables are not frayed or have exposed wires (this can cause the system to shut off); if so, you should replace those parts.
3. After the 90 seconds, Plug the AC Adapter into the system and wall outlet. Check to see if the power light on the Power button comes on.
* If the system works, plug ONE accessory into your system starting with the Sensor Bar, then turn the system on to see if it still works. Repeat this process with ONE accessory at a time. If your system doesn't work once you put a particular accessory in (Sensor Bar, GameDisc, Nintendo GameCube controller, Memory Card, SD Card, etc.), there may be something defective with that accessory.
