I am seeing a black vertical/horizontal line on my computer screen. The line stays visible and affects the display quality. I want to know what causes this issue and how I can fix it.
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I am seeing a black vertical/horizontal line on my computer screen. The line stays visible and affects the display quality. I want to know what causes this issue and how I can fix it.
A black vertical or horizontal line on a computer screen is usually caused by display-related issues such as a loose screen connection, outdated or corrupted graphics drivers, dead pixels, monitor damage, or GPU hardware problems. If the line appears immediately after turning on the computer or stays visible all the time, the issue is often hardware-related.
To fix it, start by restarting the system and checking whether the line still appears. Update or reinstall the graphics driver from the official manufacturer website, adjust the display resolution, and reconnect the HDMI/display cable securely.
You can also test the computer with another monitor to confirm whether the problem is coming from the screen or the system itself. If the line remains visible even after these steps, the display panel or internal hardware may need professional repair or replacement.