Hi Holmanix,

I am having the exact same problem i think.
. Wii U games work perfectly.

However Wii Games,

Wii Games (Zelda Skyward Sword) place it in Wii U and on the menu tried both the Wii Disc Icon and the Wii Menu Icon.
Machine boots into Wii Mode console boots into Wii Mode
Wii Menu I select the Disc Icon and the Skyward Sword Disc loads and the Start Icon highlights.
Select Start and again the Machine switches off but does not start up again.
Red Light on Wii U on.
Powering up Wii U from Wiimote just loads up Wii U Menu.

I have the latest update. My Wii games all work. I have deleted the machine and started again. I have removed all wireless networking settings still nothing.

No idea what it is but you are not alone mate

Let me now if you have any success.

It seems that using many not all of the wii menu icons will cause the machine to shutdown i think the machine wiill start up but nothing and I have waited ages.

Hi 3-dude

Even though I deleted the system from the settings on wii u I don't think it Deletes the firmware and downloads the same firmware again I was under the impression once the firmware has been applied it won't download the firmware again and every time I did try to look for An update it said I had the latest version . Would anyone know when the next major firmware update is?
Cheers