he most likely plugged in av cord then hold the button till second beep to show the image then switched it to hdmi 1080p, i had this issue working on a japanese console cause my TV is pal it wouldn't show the default low resolution for hdmi on my tv, did on my old tv because it supported both but anyways, unless you have GLOD or broken display or bricked etc it's a easy fix, i thought you would have known that?

Fixed it,