To reset the AC adapter you need to unplug it from the wall outlet and the Wii console and wait at least two minutes. Plug it back in and it should come on. If you have it plugged in a surge protector with other appliances, the other appliances may be interrupting the adapter, causing the power to go off.
Sleeslack's solution works for me. I had determined that it was the PS, as there wasn't 12V available at the connector. I had other web hits that said it was the 2.5A fuse inside the PS, and was looking for special screwdrivers, etc, and faced with finding my soldering equipment- Glad I ran into this. Usually it only takes <30 seconds, so although I had tried unpluging- I didn't wait long enough. this suggests there is some sort of thermal circuit breaker that needs time to cool off to reset. Glad it wasn't the fuse. I'll be pluging into my entertainment system UPS to avoid this happening next time there is a surge...
After cutting the end off and splicing it on another 12 v supply and finding that didn't work, I was going to buy a new supply. Then I read the above about waiting a couple minutes. Spliced the end back on the WII power and it worked. Thanks for saving me some money.
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My guess would be that the fuse in the plug has blown. Try replacing the fuse and try plugging the power supply back into the mains power socket but do not connect it to the Wii. If the power goes again and the fuse blows then the power supply is faulty. If the power in the house stays on then try plugging the power connector into the Wii and see if it works.
You need to check that the power supply is working. To this safely you will need a voltage meter. You can buy multimeters from most electrical or electronics stores such as maplin. On the power supply there is a diagram showing the power pins and the voltage output. You should be able to read 12VDC across the pins when the mains power is connected. If there is no 12VDC then check the fuse in the plug. This is a 3A fuse and it can be easily removed from the plug with a suitable flat blade screwdriver. Use your multimeter on resistance (Ohms) setting or on continuity (bleeper) setting and test across the two ends of the fuse. If the resistance is nearly zero or the multimeter bleeps then the fuse is OK. If the fuse is Ok and you mains socket has power but there is no power output then the power supply is faulty. If there is 12VDC out of the power supply then the Wii is faulty. If it is under warranty then take it back to the store. If it is out of warranty then get someone to fix it (if possible).
First turn the Wii console power OFF, and remove the AC adapter's AC plug from the power socket. Next, check wheather the disc is dirty or scratched. If it is dirty, gently wipe with a soft cloth from the center to the outside. Wait about 5 minutes. Then plug the AC adapter's AC plug back into the power socket and turn the console power on. If the same message still appears, the Wii console may be damaged. Turn the Wii console off immediately. Remove the AC adapter's AC plus from the plug, and visit support.nintendo.com for additional troubleshooting or call 1-800-255-3700.
Can you borrow a friends power supply and try it? I presume you checked the fuse in the plug socket (If a UK plug.). There is a fuse in the power supply which could have blown. There is also a fuse on the power inlet on the Wii motherboard (it is coloured green). That could have blown. After that there are over 40 fusable links on the motherboard!
please check all power and connection cables to make sure that everything is connected correctly. If that does not work then please change outlets and see if it works better. If that does not work then you have a hardware defect which should be covered under warranty with the manufacturer so you should contact them for futher assistance.
it could be the power suppy mine went wrong after about 18 months, try ebay there the cheapest. you can test if its the power supply if you know someone with a wii and use there power supply or know how to use a multi meter and check if you have a voltage coming out of the wii plug end. if you dont first try replacing the fuse in the wall plug. hope this helps.
HI. the power supply board has failed. There is a fuse(3amps) inside
the power supply unit. you will need to remove the cover from the power
supply to access this fuse. once inside the power supply, inspect the
fuse. if it is truly blown, replace it. if the fuse is not blown, this
will confirm a failed power supply unit. it should be replaced in this
Lets Hope So ?
Check the main fuse in the 3 Pin plug ( if UK )
replace if blown, also check the wires are tight to the plugs pins.
Is There any light Indication On The power Pack/Brick with These ?
Could be a faulty Power Pack.
Check the leads are firmly connected, quite easy to knock a cable out, with an accidental kick or push of the console et,c.
Mike @ Compurepair.