#1
With pc screen lines, first of all upgrade your graphics drivers, and then connect another product to the computer screen to test the screen. This will determine if the problem is with the monitor or the computer. If a line is persistent, it means the hardware is malfunctioning, and this usually will need to be fixed by a specialist or a replacement.


For more, visit- https://devicefixes.com/blog/pc-screen-lines/
#2
To fix the horizontal or vertical line on the screen opening setting and check for the built in line line. If the line is still appear then there is a physical damage and need repair.
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