Black vertical line appears on screen when entering menu's

I had a similar problem with my HDMI cable. When I would plug my turtle beach adapter into the back port next to the HDMI port, after awhile it would make these weird lines in the screen and I would have to reset the xbox for it to go away. All I did was
literally turn the cable around and plug it in the other way and it went away for good. This might not be your problem but I agree, I would try swapping out the cable with a friends first to see if that fixes it. If it does, go buy a new one. I recommend Amazon
because they are the best on price and quality. I would also try to switch to the standard SD cables if you dont have another HDMI as this would at least replicate not having that HDMI plugged in.

Hope this helps, please let me know if there is anything else I can answer.

Justin

Could be something in the HDMI path. Might be worth swapping out the cable. If that doesn't help, the dedicated GPU memory is going bad and there's nothing you can do about it.

Thanks guys, I found I had another HDMI cable lying around, so used that, and it seems to have worked for the moment!

Will let you know if anything happens again....many thanks !

I'm having the same issue I've tried three different tvs and still can't find the problem I can't get anything to display except lines

If your having the same issue on multiple TVs its your HDMI cord of your Xbox and I'd advise trying a different HDMI cable first then if it doesn't resolve contact support and submit a repair order. @ Fattycakes01 read the above post and see if your resolution
or setting are messed up.