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A quick troubleshooting guide to those mysterious lines
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Are there black lines on your screen? From a bad graphics card to physical damage to loose wires, there are many reasons why there might be black lines on your screen. This wikiHow article lists various ways to diagnose and fix black lines on your monitor.

What to Do if You See Black Lines on a Monitor

Hardware issues and physical damage are top of the list of reasons why your monitor has black lines. Look around for any damage to your monitor and make sure cables are secured properly to and from the monitor.

1

Check for physical damage.

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  1. Check your monitor for any signs of damage, including heat damage or electricity damage. In those cases, you'll notice that the plastic case surrounding the monitor looks expanded or melted.[1]
    • If external cables are running to the monitor, check them and the ports for damage.
    • Try another cable or port to rule out physical damage to either of those components.
    • You can also connect to a different monitor to see if the original monitor is the issue or if using another monitor gets rid of the black lines!
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About This Article

Stan Kats
Reviewed by:
Professional Technologist
This article was reviewed by Stan Kats and by wikiHow staff writer, Darlene Antonelli, MA. Stan Kats is a Professional Technologist and the COO and Chief Technologist for The STG IT Consulting Group in West Hollywood, California. Stan provides comprehensive technology solutions to businesses through managed IT services, and for individuals through his consumer service business, Stan's Tech Garage. Stan holds a BA in International Relations from The University of Southern California. He began his career working in the Fortune 500 IT world. Stan founded his companies to offer an enterprise-level of expertise for small businesses and individuals. This article has been viewed 5,167 times.
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Co-authors: 5
Updated: August 29, 2024
Views: 5,167
Categories: Computer Monitors
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