Fixing Flickering PC Monitor Issues
Check your cables
Whether you’re using a VGA, HDMI, DVI cable to connect your monitor to a computer, If the cable isn’t firmly connected, it might cause your PC monitor to flicker.
We suggest you check both ends of the cable to see if they are firmly connected & secured. It could also be a faulty cable so be sure to check it.
Test the monitor
There might be something with the monitor itself. Check for any physical damage, the onboard buttons and check the settings. If all seems in order, it might be the monitor. Test a new monitor, if it works, you know it was the monitor and not your PC.
If the new monitor is giving problems as well, then you can follow these next steps to check;
Screen Flickering Test
Open the Task Manager by pressing Ctrl + Shift + Esc at the same time. You can also right-click on your taskbar and select Task Manager. You won’t be using Task Manager but you need it to be open.
Windows 10 Task Manager & Application Uninstall
Keep an eye on your screen to see if Task Manager flickers. If so, and it flickers with everything else it’s most likely that it is a display driver.
If the Task Manager does not flickers with everything else it could be due to an application. 3 Applications have been identified by Microsoft; Norton AntiVirus, iCloud, and IDT Audio. Try updating them to the latest version.
If this doesn’t work, uninstall the application to test if this resolves the issue.
Video Card/Driver Issue
You might have a faulty video card or driver, use DriverSupport to scan your PC to check for driver updates.