Why Does My Monitor Flicker On And Off? (7 Causes + Solutions!)

Have you ever been in the middle of using your computer and suddenly, your monitor starts flickering on and off? It’s incredibly annoying and can be a huge disruption to whatever you were doing.

Monitor flickering is a visual disturbance that occurs when the image on a computer monitor rapidly changes between two or more shades of the same color. It is usually caused by a faulty component in the monitor, an outdated driver, or a problem with the monitor’s power source.

7 Common causes of Monitor flickering

Common causes of Monitor flickering

Some of the most important causes of monitor flickering are:

1. Display Driver

The most common cause of monitor flickering is an outdated or improperly installed display driver. Display drivers are responsible for managing communication between your operating system and your monitor, so it’s important to ensure that you have the latest version of your display driver installed. Outdated display drivers can cause your monitor to flicker, as can improperly installed drivers. Make sure to update your display drivers regularly and reinstall them if you ever experience issues.

2. Loose Cables

Loose cables can also cause monitor flickering. If the cables connecting your monitor to your computer are not properly connected, it can cause the monitor to flicker or experience other issues. 

3. Overheating

Another potential cause of monitor flickering is overheating. Your monitor may be overheating when it is in a warm or enclosed space, or if it has been running for a long period. In cases where your monitor is overheating, it can cause the display to go black or flicker.

4. Incompatible Graphics Card

New graphics cards may not be compatible with your monitor if you recently installed one. Graphics cards and monitors need to be compatible to work properly, and an incompatible card can make your monitor flicker. 

5. Low Refresh Rate

Flickers can occur if you use a monitor with a low refresh rate. Low refresh rates can cause your monitor to flicker, as extremely high refresh rates.

6. Defective Monitor

In some cases, monitor flickering can be caused by a defective monitor. If your monitor is flickering, it may be due to a faulty component or a defect in the manufacturing process. In case you suspect that your monitor may be defective, make sure to contact the manufacturer or your retailer for warranty or repair options.

7. Overclocked

The flickering of a monitor can also be caused by overclocking. In the event you have recently overclocked your computer or graphics card, you may experience flickering or other issues.

Monitor flickering can be a frustrating problem to troubleshoot. However, by understanding the influences on monitor flickering, you can identify what is causing your display to flicker and take the necessary steps to resolve the issue.

How to fix a flickering monitor?

fix a flickering monitor

Are you getting frustrated because you can’t seem to fix the issue? Flickering monitors can be very annoying, especially if it’s happening regularly. Fortunately, there are a few things you can do to help resolve the issue.

1. Check the cables(power and signal)

Check the cables(power and signal) when monitor is flickering

When dealing with a flickering monitor, the first step is to examine the power and signal cables, such as HDMI, DVI, or DP cables. These cables are essential for transporting digital signals from the computer to the monitor, and any damage to the cables can cause a weak signal or interrupt power. The weak signal will cause a flickering display on the monitor, and the interruption of power can also cause the monitor to flicker.

The first step is to inspect these cables for signs of damage, such as fraying or loose connections. If there are any signs of damage, it’s best to replace the cable with a new one. As long as the cables are in good condition, then the next step is to verify the connections. Make sure that all the connections are tight and secure, and that the cables are correctly plugged into the correct ports.

2. Check the power supply

A flickering monitor can be a result of an inadequate power supply. A power supply unit (PSU) is the component that supplies electricity to all the components of a computer. When the PSU is not providing enough power, it can cause the monitor to flicker. To fix this, you need to examine the power supply unit first. Check to see if it is providing enough power to the monitor. Assuming it is not, then you need to replace it with a more powerful one.

Another cause of flickering monitors is an annoying sound coming from the power supply. Whenever you can hear a loud humming or buzzing sound, then this could be the source of your flickering. In this case, you would need to replace the PSU with one that is quieter and provides enough power for the monitor.

Unless you are unsure of what the cause of the flickering is, then it is best to consult a technician rather than deal with electrical parts and risk your life.

3. Check your display setting

The display setting is a feature in Windows that allows you to adjust the resolution, color depth, refresh rate, and other aspects of your display. It is necessary to ensure that your monitor’s resolution and refresh rate match its native resolution and refresh rate to eliminate flickering.

To access the display settings, first, right-click your desktop and select the “Display Settings” option. This will open a new window where you can adjust the settings for your display. The first setting you should check is the resolution. Make sure that it matches the native resolution of your monitor. If it does not, simply select the resolution from the drop-down menu.

The next setting you should look at is the refresh rate. This is the rate at which the image on the screen refreshes and should match the native refresh rate of your monitor. In the event it does not, simply select the refresh rate from the drop-down menu.

After adjusting the resolution and refresh rate, look at the color depth setting. This should be set to the highest level your monitor can support. If it is not, simply select the highest level from the drop-down menu.

You should examine the “Advanced Settings” tab for any other display settings that may be causing the flickering. If any of the settings are incorrect, simply adjust them accordingly.

You can see the display settings at the setting.microsoft.com also in detail.

4. Check your video cards and update the drivers

If your monitor is flickering, it can be due to your video card and the drivers. Updating the drivers can help reduce the occurrence of monitor flickering as it ensures the video card is running the latest software, which may improve its performance.

There is also the issue of overheating to consider. Whenever your graphics card is running too hot, it could cause the monitor to flicker. Make sure your graphics card’s temperature is displayed in the software of your GPU manufacturer. Whenever the temperature is too high, it may be necessary to increase the cooling capacity of your system. This could include adding more fans or a larger heatsink to ensure proper airflow and cooling.

5. Check the ports on your monitor and PC

A flickering monitor is one of the most common computer issues and can be caused by a wide range of factors. First, you should check that the ports on your monitor and PC are functioning properly. Unless the ports seem to be working correctly, then you should verify that the cables connecting the monitor to the PC are securely connected and not damaged in any way.

In the event, the cables are properly connected and there are still flickering issues, then examine the resolution settings on the monitor and your PC to ensure they match. As long as the resolution settings are mismatched, adjust the settings to match and see that this fixes the issue.

Once none of these solutions have worked, then it may be time to take your PC to a professional PC repair shop and have them diagnose the issue. The technicians there may be able to identify the underlying cause of the flickering monitor and suggest solutions to fix the problem. 

Over To You!

There are a few possible explanations for why a monitor might flicker on and off. The most common causes are due to a faulty cable connection, a weak power source, a malfunctioning graphics card, or a malfunctioning monitor. 

To determine the exact cause, it is best to check the cables, power source, and graphics card for any loose connections or damage. Additionally, it may be necessary to reset the monitor or contact the manufacturer for further assistance. If the problem persists, then it may be necessary to replace the monitor altogether.


Is it normal for my monitor to flicker?

No, it is not normal for a monitor to flicker. If your monitor is flickering, it could be a sign that something is wrong. In the event the flickering persists, it is recommended to check the connections and power supply of the monitor to ensure they are secure. As long as the problem persists, it is advisable to contact the manufacturer of the monitor for assistance.

Is a flickering monitor a sign of a hardware problem?

In some cases, a flickering monitor can be caused by a hardware issue. It is recommended to test all of the connections, see whether the monitor works on a different computer, and test a different monitor on your computer to rule out any potential hardware issues.

Is it dangerous if my monitor is flickering?

While there is no immediate danger associated with a flickering monitor, it can be a sign that something is wrong with your computer or monitor. We recommend troubleshooting the issue right away to avoid any potential issues.