Sound but no picture for xbox 360?

Question

so I've been using the high def cables(the green, blue, and red cables) and today I brought it over to my friends house but he has a regular tv so I went and used the other cables(yellow, white. and red)...yup no picture only sound. Everything was plugged in correctly is there someway to get the picture?

Answer 1

It's possible that your 360's settings were set to Hi-Def and will not work on a normal TV without you changing the settings.

Answer 2

there's a switch on the cable.