Chosen Solution
I bought a brand new 60 inch 4K HDR TV today and when the screen is dark I get faint black vertical lines. On xbox one and YouTube app for example. Won’t notice watching Sky generally but quite noticeable when screen is dark. Is this normal? Should I send it back!
Matt sure looks like pressure marks. Return your TV since those will not get better.
It may be a firmware update issue, since it is brand new take it back to the place you bought it and ask for a new one.
