Some don't have a switch actually. I would have gotten shafted by this fun fact a while back if I didn't still have the Nintendo composite cables that came with the Wii. I went into settings, switched the video output around (making it look weird temporarily) and then plugged the component cables back in. Voila.
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"Setsuna, you have to change. To make up for me... who didn't change." ~SCP~
http://img.imgcake.com/Jeffzeropngus.png