Usually nothing, but all your music could be erased, so it's not worth the risk.
Buy Quick Diconect tools At a parts store.They come on a strip in various sizes.
By unplugging the device in question or turning off the breaker for the fixture in question.
go into ur user pannel and there is an app thes says tools speakers and keyboard click on it and select disconnet... this should work
You should standby off it because your WiiConnect24 will be off too.