One of the most frustrating aspects of using a high-quality computer monitor like a top-rated 1440p monitor and a PC to run Windows 10 and related operating systems, is the appearance of mysterious black bars on the sides of the display. After spending time researching and reading many monitor reviews, a device that starts to show these unsightly black bars can be very annoying, so read onwards to find the solution to this issue.
Although, if you see vertical lines on your computer monitor, that’s a different issue altogether. Be sure you can tell the difference between these lines and the black bars on the monitor sides before attempting to troubleshoot.
Generally speaking, the main cause of these black bars has something to do with how the monitor’s aspect ratio setting is interacting with the computer’s aspect ratio setting. There can occasionally be other causes of the dreaded black bars, but that is the number one factor to take a look at.
Alternatively, if one side of your screen looks darker than normal, you may need to fix a screen uniformity error, which is very different than the issue of the black bars on the side.
Fixing these black bars will require a bit of troubleshooting and some adjustments to settings. Here are some general guidelines and tips so you can back to using your display without frustration.
These black bars appear on the side of your monitor due to an incorrect setting regarding the aspect ratio. As an example, an ultrawide monitor with an aspect ratio of 16:9 will provide an incorrect visual representation while accepting a signal with an aspect ratio of 4:3. The end result? Black bars on either side of your monitor. Adjusting this aspect ratio can instantly fix the issue of errant black bars along the side of a display. You may want to keep a record of what the settings were before making adjustments, however, just in case you worsen the picture.
Warning: You may want to keep a record of what the settings were before making adjustments, however, just in case you worsen the picture. Practice the same thing with sound settings or adjusting your computer monitor speakers by being sure to note down the original settings when you’re adjusting them.
Once you realize that incorrect enmeshment of the aspect ratio settings is the cause of the black bars, the fix can be a simple matter of adjusting the settings. This process will vary from monitor to monitor, so we recommend looking through the instructions and finding a page on changing the picture size. The instructions can provide useful information to fix other issues, like when a monitor shows no signal. As for your PC, navigate to the control panel, click on “Appearance and Personalization”, then click on “Advanced Settings.” Go to the “Graphics Control” panel and click on “Scaling” and finally “Customize Aspect Ratio.” Then you can fix and tidy up the aspect ratio settings and can get the most out of your flat or curved monitor, which you can explore more in our curved monitor reviews.
Tip: We recommend looking through the instructions and finding a page on changing the picture size
There is a chance the issue is not the cause of an incorrect aspect ratio. If that is the case, you will have to complete other troubleshooting steps. We recommend doing a thorough Google search and looking through any and all system and display settings for anything you can change to fix the problem.
Warning: There is a chance the issue is not the cause of an incorrect aspect ratio
Tip: We recommend doing a thorough Google search and looking through any and all system and display settings for anything you can change to fix the problem
Use a 100% cotton cloth or micro-fiber cloth for cleaning a computer monitor or HDTV. (Source)