I have a problem, and hope that you guys can possibly help me. I was playing my WiiU on Friday on my friends projector. We used the green and blue composite cables. Played fine for 5 hrs. I get home yesterday, hook it all up, and nothing happens. The little blue light is solid. So it's not flashing. I tried using hdmi, and a/v cables to see if it works. And nothing happens. Does the system support auto-detect for video settings. ANd if not, how in the world am I supposed to get it back to HDMI?

Can't help specifically with the Wii U but I did something similar with my PS3 a few years back and the only way I could recover was to hook up to a tv/monitor in the last mode I used then switch to HDMI - this meant have the two video outputs connected to the tv simultaneously then changing quickly to the hdmi input before the confirmation timer ran out.

Hopefully you'll get a better answer that relates to the Wii U.

(edit) sorry did you mean you tried running on component when you got home? (didn't know Wii U had component AV)

I tried running on A/V when I got home, and HDMI. Just not the component cables. (the green and blue one.

ok mate, well I think you'll have to try the component leads - RGB + RW - one a tv with component inputt least to confirm your video still works. Make sure tha (a) you don't confuse the red audio lead for the red video lead and (b) make sure you have strong enough light to tell the green from the blue socket on the tv... sometimes it's a little difficult to determine.

@Mick I can sleep well tonight knowing that such deep and enlightened individuals as these will be caring for me in my advancing years....

Yeah, the easiest way is to hook the components back up to another set and switch it back to HDMI. I assume there's probably a mode like the Xbox 360 had where you can use the power buttons or controller buttons to reset the video settings without being able to see the screen, but I've yet to find the instructions for doing so.

You guys have been super helpful. I went out to the game store and bought a component cable.Got it to work. Thanks a lot guys. Def made my day. Time to play some AC3.

You should be able to use the game-pad to make the necessary video changes (or at least that's how it worked during the initial setup).

EDIT: Nevermind

You can use the gamepad to change the video connection settings, just go to the settings with the gamepad. Not sure why @shinesprite said nevermind cause I've done it twice on the gamepad after the initial setup

This. I've went back and forth between a couple TVs, you have to use the gamepad to access the video settings and switch them. It does not automatically detect settings.