Screen flickering fix

Last updated: 2026-08-24

There is one test that splits this problem in half before you change anything, and it takes five seconds.

1. The Task Manager test

Press Control, Shift and Escape to open Task Manager. Leave it on screen and watch.

Task Manager flickers along with everything else. The problem is your display driver, the cable, or the monitor. Go to step 2.

Everything flickers except Task Manager. The problem is an application. Go to step 6.

This works because Task Manager draws itself differently from normal apps. Microsoft built it this way on purpose, and it is the fastest diagnostic in this whole guide.

2. Check the cable first

Loose or failing cables cause more flickering than anything else on desktops.

Unplug both ends and push them back in firmly. DisplayPort connectors have a small latch that clicks, and a cable that is not latched sits half seated and looks perfectly normal.

Then swap the cable for a different one. Cables fail internally with no visible damage, and a marginal cable often works at 60Hz and flickers at higher refresh rates, which makes it look like a settings problem.

If the flicker changes when you move or bend the cable, you have found it.

3. Turn off variable refresh rate

If your monitor supports FreeSync or G-Sync, try switching it off.

Variable refresh rate works by changing the refresh rate on the fly to match what the computer is producing. On many panels, especially VA ones, large or sudden changes cause visible brightness flicker. It shows up most in menus and loading screens, where the frame rate swings wildly.

Turn it off in two places, because they are separate settings. In the monitor’s own menu, look for FreeSync, Adaptive Sync, or G-Sync. Then in your graphics control panel, NVIDIA Control Panel under Set up G-SYNC, or AMD Software under Display.

If the flicker stops, that was the cause. You can often keep the feature and avoid the problem by capping your frame rate just below the monitor’s maximum.

4. Check the refresh rate is a rate your monitor supports

Open Settings, then System, then Display, then Advanced display.

If someone has set a custom or overclocked refresh rate, the panel may be running slightly outside what it handles cleanly. Drop it back to a standard rate and see whether the flicker goes.

5. Roll the display driver back

Flicker that started right after an update is nearly always the driver.

Open Device Manager, expand Display adapters, right click your graphics card, choose Properties, then the Driver tab. If Roll Back Driver is available, use it.

If it is greyed out, download the previous driver version from NVIDIA, AMD or Intel directly. Get it from them rather than from Windows Update, since Windows often supplies a generic driver that handles multiple monitors and high refresh rates poorly.

6. When only apps flicker

If Task Manager stayed steady, an application is the cause, and it is usually one that draws using hardware acceleration.

Browsers are the most common. In Chrome or Edge, open Settings, search for hardware acceleration, and turn it off. Restart the browser. Do the same in Discord, Spotify, and any Electron based app, since they all share the same rendering engine and the same problem.

If turning it off fixes the flicker, you have narrowed it to graphics driver behaviour rather than the app itself, and a driver update often solves it properly later.

7. Laptop screen flickering at low brightness

This one is not a fault, and it explains a symptom that no amount of troubleshooting will fix.

Most laptop and phone screens dim by switching the backlight on and off very rapidly rather than by lowering its power. It is called PWM, and at high brightness the switching is fast enough that nobody sees it. At low brightness the off periods get longer, and some people start to perceive it as flicker, eye strain, or headaches after long sessions.

Test it. Turn the brightness up to maximum. If the flicker disappears completely, PWM is the cause.

You cannot switch it off, because it is how the panel is designed. What helps is running the screen brighter and reducing glare in the room instead, or using a display that advertises flicker free or DC dimming.

People are very different in how sensitive they are to this. If one person sees a flicker on a screen that looks perfectly stable to everyone else, this is usually why.

8. Check the power supply on a desktop

Flicker that happens under load, such as when a game starts, can be a power supply that cannot keep up. The graphics card draws more current, voltage sags, and the display output stutters.

The tell is timing. If the screen is stable on the desktop and only misbehaves when something demanding starts, look at power before you look at the monitor.

Settle it with one swap

Plug the monitor into a different computer, or a different monitor into this one.

If the flicker follows the monitor, it is the monitor. If it stays with the computer, it is the graphics card, the driver, or the cable. That single test saves hours of guessing.

For a laptop with a flickering built in screen, connect an external monitor. If the external one is clean and the built in one flickers, the display panel or its ribbon cable has a fault, and after a drop or a hinge problem that is very likely.