Hi Moqid,
This is Tamal trying to help you with the issue.
Please check the screen while you are in UEFI/BIOS. I think those are caused by the damaged LCD screen. You can also check with an external monitor connected. Lines should net be there.
If you find Lines present while you are in BIOS or absent with external monitor/TV etc then be sure it is a lcd issue and raise warranty ticket with Lenovo. If you find them otherwise then you can try a display driver reinstallation after removing the display drivers using DDU (display driver utility). I am almost sure it is an LCD problem.