Why is my display flickering?

Flickering screens can be caused by a variety of issues, including defective hardware, software glitches, power supply problems, and display or cable connection issues. Depending on the cause, the fix for a flickering screen may be as simple as updating the software or as complex as replacing the hardware. A flickering display requires further investigation to determine its cause and fix it.

Defective Hardware

The most common cause of a flickering display is a defective component within the display, such as the LCD panel, backlight, inverter board, or video card. If any of these components are malfunctioning, they can cause the display to flicker or appear to have blurred lines. Replacing the defective part is the only solution to this problem.

Software Glitches

Software glitches, such as corrupted drivers or software conflicts, can cause a flickering display. To address this issue, ensure that all drivers and software are updated to the latest versions and that there are no unnecessary programs running in the background. If a flickering display persists after these steps, it may be necessary to reset the system to factory settings and reinstall the operating system and all applications.

Power Supply Problems

Another potential cause of a flickering screen is an issue with the power supply. A faulty cable or connector, insufficient power, or a defective power supply unit can all contribute to the display flickering. Check all cables, connections, and power supplies for any signs of damage, and if necessary, replace them with new components. In some cases, it may also be necessary to upgrade the power supply in order to ensure that the system has enough power to run properly.

Display or Cable Connection Issues

If the display is connected to the computer via a VGA, HDMI, DisplayPort, or other type of cable, a faulty connection can be responsible for the flickering. Check all cables, ports, and connections to ensure they are securely connected and in good condition. It may also be necessary to replace any worn or damaged cables with new ones.

Incorrect Display Settings

Incorrect display settings can also cause a display to flicker. If the refresh rate is set too low, the display may appear to flicker or skip frames. To fix this, go into the display settings and adjust the refresh rate to a higher setting. Additionally, be sure to check the resolution settings as well; if the resolution is set too high, the display may flicker.

Hardware Compatibility Issues

In some cases, a flickering display can be caused by a hardware compatibility issue. This is especially true if the display is connected to an older GPU that is not supported by the system. To address this issue, install the latest drivers for the GPU and/or update the BIOS of the system to ensure compatibility.


A flickering display can often be a sign of a serious issue that needs to be addressed as soon as possible. Make sure to thoroughly investigate the issue and determine the cause before attempting to fix it. If the issue persists, it may be necessary to take the computer in for professional repair.