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If the monitor (or its cables) are not damaged, you can check the settings for its resolution and refresh rate
This article takes you through various checks and fixes you can perform on your computer and its monitor to find out why the lines appear and how to make them disappear.
Horizontal lines on a computer monitor can be caused by
Some of these are easy to fix, while others might require a trip to the repair shop.
Here are all the best solutions for eliminating horizontal lines on your computer screen or monitor.
Turn your monitor off and on again. It seems like a basic fix, but it can often correct screen glitches, such as horizontal lines.
Restart your computer. This can fix a variety of tech issues and could get rid of any flickering lines on your screen.
Try a different monitor. Doing so can help you determine if the lines are caused by your computer’s screen or the computer itself.
Check your monitor while it’s disconnected. Keep your monitor powered on, unplug it from your computer, and look for any flickering or lines on its screen while it’s disconnected. If you see any distortion, this means that your monitor is damaged.
Detach and reattach the keyboard. If you have a computer that uses a removable keyboard, remove it, wait a few seconds, and reattach it.
Close and reopen your laptop. Close your laptop’s screen, wait a few seconds, and reopen it slowly. Look to see when the lines appear on the screen as you open it. If the lines only occur at a certain angle, the cause is likely damaged wiring.
Use your laptop on a hard surface. Soft surfaces, such as on a blanket or tablecloth, can cause overheating, resulting in screen flickering and lines.
Install the latest operating system updates. Old software conflicting with newer hardware could cause the lines on your computer screen.
Check the monitor connection. Ensure all cables are securely connected, and watch for any improvements in screen image quality while inspecting the cables. If you notice the image improves or worsens while touching the connecting cable, it may need replacement.
Disconnect the monitor. If you’re using an external monitor, disconnect it from your computer, wait several seconds, and reconnect it.
Remove magnets and electronics. If you have other electronics or magnetic devices near your computer, screen, or connecting cables, move them somewhere else as they may interfere with the connection and cause the lines.
Clean your computer and monitor. Dust may be causing your computer and its monitor to overheat and create visual distortions.
Change the screen resolution. Whether using a Windows or Mac computer, try changing its screen resolution.
Calibrate your monitor. This process should only take a few minutes and can help optimize your monitor for use with your computer and its environment.
Change your monitor’s refresh rate. Switching to another refresh rate setting can help with lines and screen flickering.
Update your device drivers. Check for driver updates for profiles associated with your monitor and screen.
Run a troubleshooter. Open Settings > System > Troubleshoot > Other trouble-shooters, and run the Video Playback and Program Compatibility trouble-shooters. If you get presented with recommendations for other trouble-shooters, run those too.
Reset your monitor to its factory settings. If you’re using an external monitor or screen, use its built-in settings, not your computer’s, to reset it to its factory settings. You can access these settings via a physical Settings or Menu button on the computer monitor.
Contact official support. Contact the support for your computer’s manufacturer and inquire about a repair or replacement.
Upgrade to a new computer or screen. If nothing else works, it may be time to upgrade to a new computer or invest in a newer monitor.
If your monitor is displaying a message that reads "no input signal," you may have a defective cable or component. To troubleshoot the issue, turn your computer off and on again. Also, unplug the monitor-to-PC cable and plug it back in, making sure the connection is secure. Try another monitor to see if the problem is with your PC. Also, try resetting your video card; if nothing else works, replace your video card.
To fix coloration and distortion on a computer screen, power the monitor on and off, restart the computer, and make sure the cable between the monitor and computer is connected securely. If you're using a CRT screen, try degaussing the monitor. You can also try adjusting your video card's quality settings and experimenting with your monitor's adjustment buttons.
To fix screen burn on a monitor, also called "ghosting," try turning off your display, ideally for at least 48 hours. Also, try setting your screensaver to an all-white image and letting it run for a few hours. You can also try using the JScreenFix tool, which fixes stuck pixels.
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