Weird Wii problems

[Tellis]

Is your Wii soft modded at all?

You could always try reformatting the Wii to its factory settings. You will lost all of your Wii shop downloads though and have to redownload them.
And make sure to un-bind your wii shop account before doing it, so you can re-bind it afterwards.

... you can do that? Bind and rebind Wii Shop accounts, that is? I'm pretty sure it's always said "the removal of the account from this system will irreversible" or whatever. I want to try resetting mine too, maybe that'll fix the stupid problem with mine (though mine's most likely a hardware issue with the fan, if this actually works like you say, it couldn't hurt to try)