A bunch of people are reporting this problem. Hopefully it is a software issue and not a hardware problem, but Nintendo hasn't said anything about it yet.

I got the same problem. I dont think its hardware though. Cause you can eject the disc (that will still work) use the tv function on the gamepad. If the wii's power button is controled by a software switch (software activates the on off function) instead of a physical switch then this would indicate to me that the software itself has crashed...or maybe I am nuts. I love the descritpion by the way.

Mine does that too. Hope they acknowledge the issue. Did not get the warranty cause I never get one and hoping that wasnt a mistake.

See I have no idea how the mii vers would affect it. Unless the guy figured out how to change miis to reflect something they had in beta

you will have to send the wii u in for repairs to do so call nintendo at 1-800-255-3700.

If this item requires a physical repair  can you just tell me what part in it is defective?

I'm also having the same problem. Twice in 5 minutes while playing NSMBU.

Have you downloaded and installed both the system update and the game update?

I read that too, Im just really hoping its true, and not the person just saying that to give up our hopes,

I really like this system, and I hate to see it go cuz of faulty issues, I still think it has to do with something about online, but im not sure at all.

Same problem here.  I'm sure Nintendo is scrambling to figure this one.  Sounds like a pretty common issue :(

it sounds to me it has some thang to do with nintendo land cause mine did the same so far its only been nintendo land

*** I think I have a temporary solution if THEMK's solution does not work ***

Delete your network connection: Settings -> Network (first icon), Press X (Connections), click on all connections and then delete the settings for now.

OR

Try rebooting your router/modem setup

OR

Buy the official USB to ethernet accessory (UNTESTED SOLUTION)

Based on what I've read everywhere, it looks like a problem with Miiverse integration or the Nintendo Network. I hard crashed 5 times in a row while I was trying different settings and allowing for a cooloff period of 15 minutes each time unplugged. Same issue.

I restarted my router, and things were going well for a while, the next day, it started again. Since I made the assumption that it may be the router, as it consistently crashed on games that use Miiverse integration: NSMBU, ZombiU, NintendoLand, CoD.

When I played Tank! Tank! Tank!, I did not receive a crash. Went back to NintendoLand, and had a crash within 10 minutes of trying the Metroid game.

Once I removed the network settings all games, of course now without network, are working no problems. Definitely would keep checking every day next week for a system update, if none are found remove the settings. Keep on playing.

I hope this helps.

And one more to the list... When I play Nintendo Land, it 's locking up on me the same way.

The thing is, we've been playing 2 player NL all week with no problems. Today we were playing 3 players (instead of the normal 2 players) when we saw it.

We played two matches of Luigi's Mansion and 1 of Metroid before we hit it for the very first time. We thought it was a fluke. After having to pull the power, we started Metroid up again. This time it locked up before we could even start a game. After another unplugging/re-plugging, it froze at the mini game selection screen. We switched to SMB U, and so far no problems...

I hope it's for NL only... And that it's patched soon!

***Edited to remove personal information.***

Message was edited by: NOA_TECH_JOE

Yup, happening to me now too. Can't play anything on Nintendo Land now without getting this horn of death. I will be calling Nintendo soon to see what they have to say about this. Glad to see I'm not the only one here. That sound makes me nuts!

Happened 5 times in a row within Nintendoland. Happens when loading up a minigame. System worked without a hitch for 4 days, and now it's unplayable. Tried to call Nintendo Support, was on hold for 20 minutes. This sucks. I'm wondering if I should return the system as it's still within first 7 days of purchase. (I haven't bought anything on eShop yet).

You should see a 3DS when it crashes, It does the same exact thing, even the Manual volume slider fails to work. It sounds like one of those disorienting sound devices that the Military uses as weapons. I am getting the Wii U soon and hopefully, they fix it. I am afraid to use headphones while playing GBA ambassador games on the 3ds or putting it into sleep while in a game because of the noise. If Nintendo does not fix this problem on the Wii U (its still not fixed for 3ds), I will be afraid to use the headphone jack on the gamepad for netflix and amazon prime as i could lose my hearing it it does the "Horn" while using it in gamepad only mode.

Add me to the list of those that have this issue.

I'd used the USB wireless addapter from my Wii on the Wii U, so when the horn started up again yesterday I just unplugged the adapter after unplugging the console.  That has fixed the problem for the time being.

I've also tried disconnecting my router so my Wii can't go online, but still no solution.

everytime i turn it on it froze