Welcome to HP Support Forums. 🙂 I came across your post and would like to help.
I understand that you have an OMEN X by HP 35 Curved Display. I see from the image that faint vertical line appearing on the screen.
I would like to mention you to please check in BIOS once. If the line appears in BIOS too then it is not normal and I suggest you to contact our HP phone support to explore the hardware service options.
I hope this answers your question. Please feel free to let me know if you have any questions. Cheers! 🙂