Hey there. This started appearing out of nowhere while I was playing. I didn't punch the monitor or anything. The monitor is a 60hz and I've been using it since 2016. I believe the cables are as old too.
https://prnt.sc/yh3hx0
https://prnt.sc/yh3exk
https://prnt.sc/yh3hx0
https://prnt.sc/yh3exk