Cgggg

I am having an issue where there are artifacts all over the screen and the video cuts out every second to a blue screen . At the top right of my tv is something that says : AV, NTSC this happens in games and the menu. This makes the original Xbox I have unplayable , any ideas? Or is it gone i have tested with Multiple av cables, power cables and tv’s. Same issue dash version : .39.0528A Build 584 Wish I could attach a 4 second video to explain it better