How can I fix the vertical lines on my PC monitor?

How can I fix the vertical lines on my PC monitor

Computers and computer equipment, like any other component of a PC system, operate or fail to operate as a result of several factors:

  1. The input from the computer,
  2. The settings on the screen, and
  3. The performance of the screen itself.

If you have vertical lines on your display, one of several things might be wrong.

Check your monitor’s power source to make sure it is plugged in and turned on.

If your monitor was recently moved to a new location, it may be an electrical signal issue. If your monitor is plugged in and turned on but you are still experiencing the same issue, adjust your monitor’s brightness. If adjusting doesn’t work, unplug your power cable from both the back of the computer tower and the wall socket then plug it straight into the wall without any other devices or computers connected to it. Also try swapping out the cord with another one using similar specs for testing purposes. After unplugging everything and swapping cords around, check if you see any improvement in lines appearing on your screen. If not, turn off your computer by holding down its power button until it shuts completely off. Disconnect all cords attached to the monitor and put it back on its stand.

Turn your computer back on and see if the lines appear. If they don’t, adjust your brightness and unplug and plug wires around again to make sure that everything is working as it should be.

Check monitor settings

Look for and press the monitor’s menu button (the small square located at the lower-right front of the screen). Press the down arrow to navigate to “Automatic Adjustment.” If this menu selection is not available, skip to step 3; your monitor does not have this capability.

Fiddle with your monitor’s contrast and brightness settings by pressing “Menu” again and navigating through the selections under “Picture.” Try using different combinations of these adjustments until you find a setting that eliminates most, if not all, of the vertical lines from view. Bump up brightness if they are dark or gray in color, turn up contrast if they are light or white in color, and adjust both settings accordingly.

Check monitor’s back panel

Unplug the power cord and remove your monitor’s back panel (if applicable). Check to see if any one of your monitor’s adjustment knobs is preventing your screen from being flush with the back of your computer; turn these knobs until you no longer feel resistance when trying to adjust them. Replace the back panel and plug in the power cord, then try displaying a picture again.

Make sure the monitor is turned on and that the screen isn’t frozen

If you are not able to see an image on your monitor, the screen may be frozen. To unfreeze it press Ctrl+Alt+Delete keys simultaneously (or use a similar key combination for your operating system) and select Task Manager – make sure the Applications tab is selected; click the New Task option to launch another application or task.

Try connecting a different device

Try connecting a different device (such as a laptop) to your computer using an HDMI cable to see if there are any changes in picture quality. If the other device has a better picture quality than the original monitor, you might consider buying a new monitor.

Check and update your graphic card drivers

Your graphic card might need an update to work properly with the monitor. Check for updates online and install all available updates to your computer’s graphics card drivers. You can usually find the latest driver updates on your computer manufacturer’s website.

Note: Make sure you’re downloading the latest certified drivers only ( For Nvidia  ; For AMD ), the beta versions are not supported by hardware manufacturers.

Don’t forget to restart your computer after updating the drivers!

If you’re still having problems with the monitor when connected, try adjusting the settings for your graphics card in Windows. Right-click on your desktop and select Graphics Properties to go to the Graphic Card Control Panel. If you’re using Windows 7 or earlier, go to the Display Properties instead.

On the screen that pops up, click on the Advanced Settings button (on Windows 8 and 10, go to the Monitor tab in this window). You’ll be taken to a new window where you can adjust your monitor settings further. Try increasing the refresh rate of your monitor and you’ll notice that the vertical lines start to disappear.

Go to control panel – Hardware and Sound – Display. Select your monitor and choose properties. Under the “settings” tab, check if there are any changes in position or picture quality when you adjust colors or contrast settings.

If that doesn’t work, try increasing or decreasing your monitor resolution. Decreasing the resolution will give you a larger screen area at the expense of reduced picture quality; increasing the resolution will make everything smaller but more defined.

Go to your computer’s control panel and open up “Display” (if Windows 10, right-click on the Start menu icon and go to System -> Display). You should see an option for changing your display settings, similar to how it looks below. The goal is simply to change the display scaling options until you’re comfortable with what you can see–this can reduce issues like blurry text or large icons if things are too big on your monitor.

Reset your monitor

If the above steps have failed, it might be time to reset your screen. There are two ways to do this, depending on the make of your screen. The simple way is to find a small pinhole in the back center of your device’s casing–this will be accompanied by a reset button somewhere on the front side under an LED status bar. Press it in with something thin like a paperclip or pen lid, but don’t push too hard! Once you press in that pinhole for about 3 seconds, your screen should reset and you’re good to go again without having to buy something new.

The second option would be to take apart your monitor if need be and unplug all connections inside of it so there’s no power going through anything. get some compressed air and blow the dust away from the inside of your monitor. Plug it back in and you should be good to go!

If you still have vertical lines after trying all of these steps, contact our technicians for more help!

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...