Why Is My Monitor Flickering? 9 Ways to Fix It Fast
Monitor flickering is most often caused by a loose or faulty video cable, a refresh rate your monitor doesn’t support, or an outdated graphics driver. In most cases you can fix it in a few minutes by swapping the cable and checking your display settings. If your screen is built into a laptop, see our laptop screen flickering guide instead.
Table of Contents
Jump to your situation: Flickers all the time · Only when gaming · After waking from sleep · One monitor in a dual setup · After a Windows update
First, find where the problem is (2-minute test)
Before trying fixes, work out which part is at fault. This saves you from replacing things that aren’t broken.
- Open Task Manager (Ctrl + Shift + Esc). If Task Manager flickers along with everything else, the cause is usually your graphics driver or display settings. If it stays steady while only one app flickers, that app is the problem.
- Open the monitor’s own menu. Press the menu button on the monitor. If the on-screen menu flickers, the monitor itself is faulty, and no software fix will help.
- Try another device. Connect the monitor to a different PC, laptop, or console. If it flickers there too, the monitor is the problem. If it doesn’t, the cause is your PC, cable, or settings.
The 9 Monitor Flickering Fixes, From Easiest to Hardest
Here are 9 ways to fix monitor flickering.
1. Reseat and replace the cable
Unplug the video cable at both ends and plug it back in firmly. If the flicker continues, try a different HDMI or DisplayPort cable. A damaged or low-quality cable is the most common cause of monitor flickering, especially at high resolutions and refresh rates. Not sure which cable suits your setup? Our HDMI vs DisplayPort guide explains the difference.
2. Try a different port
Switch to another input on the monitor and another output on your PC. On a desktop with a dedicated graphics card, make sure the cable goes into the card and not the motherboard. Plugging into the wrong one can cause no signal or unstable output. Our HDMI vs DisplayPort guide covers port differences in more detail.
3. Check the power cable
Make sure the monitor’s power cable is seated properly at both ends, and plug it directly into a wall outlet rather than a power strip, UPS, or adapter. A weak or failing power supply can cause flickering and uneven brightness.
4. Set the correct refresh rate
On Windows 11, go to Settings > System > Display > Advanced display and pick a refresh rate from the dropdown. Choose the highest rate your monitor officially supports (such as 60, 144, or 165 Hz). A mismatch between what your PC sends and what the monitor can handle often causes flicker. Also confirm the resolution is set to the monitor’s native resolution.
5. Turn off G-Sync, FreeSync, or HDR
Adaptive sync and HDR can cause flickering with certain monitor and graphics card combinations. Disable them in your graphics control panel (NVIDIA, AMD, or Intel) and in Windows display settings, then check whether the flicker stops. If it does, turn the features back on one at a time to find the culprit.
6. Update or roll back the graphics driver
Outdated or corrupted drivers are a frequent cause. Download the latest graphics driver from your GPU maker’s website (NVIDIA is linked here; AMD and Intel have equivalent pages). If the flicker began right after a driver update, open Device Manager > Display adapters > your GPU > Properties > Driver > Roll Back Driver instead. Step-by-step instructions are in our guide on how to update your graphics driver.
7. Remove sources of interference
Move speakers, phone chargers, routers, and other electronics away from the monitor and its cables. Fluorescent lights and unshielded cables can also introduce interference. Visible flicker caused by interference is different from the invisible kind produced by brightness dimming. If you get headaches without seeing any flicker, read about PWM flicker.
8. Reset the monitor to factory settings
Open the monitor’s on-screen menu and find the reset option (often under System or Setup). Also check the manufacturer’s site for a firmware update. Many manufacturers publish troubleshooting steps for monitor flickering that cover model-specific resets and settings.
9. Test for a hardware fault
If the monitor flickers on other devices, with a new cable, and in its own menu, the backlight, power board, or panel is probably failing. At that point software fixes won’t help.
Monitor Flickering?
Plug the monitor directly into a wall outlet
Flickering in specific Situations
Monitor flickering only when gaming
This is usually G-Sync or FreeSync, a frame rate far outside the monitor’s adaptive sync range, or an unstable GPU overclock. Cap your frame rate slightly below the refresh rate, disable adaptive sync to test, and remove any overclock.
Monitor flickering after waking from sleep
Often a driver or power management problem. Update the graphics driver, check for monitor firmware, and in Windows Power Options turn off aggressive display and PCI Express power-saving settings.
One monitor flickering in a dual-monitor setup
Mixed refresh rates can cause flicker on the slower screen. Set both monitors to the same refresh rate where possible. Also try swapping cables between the two screens to see whether the flicker follows the cable or the monitor.
Monitor flickering after a Windows update
Roll back the display driver first. If that doesn’t help, uninstall the latest update under Settings > Windows Update > Update history > Uninstall updates.
When to Repair or Replace
If the flicker survives a cable swap, a different PC, and a factory reset, the monitor is faulty. If it’s under warranty, ask the manufacturer for a repair or replacement. For an older or budget monitor, replacing it is usually cheaper than repairing it, because a new power board or panel can cost a large share of what the monitor is worth.
Frequently asked questions
Why does my monitor flicker randomly even though nothing changed?
Random flickering usually comes from a loose or worn cable, an unstable power supply, or interference from nearby electronics. Reseat both ends of the video cable and plug the power cord straight into a wall outlet. If it still happens, test a different cable, then a different PC. For cable choices, see our HDMI vs DisplayPort guide.
My monitor flickers only when I play games. Is it G-Sync or FreeSync?
Often, yes. Adaptive sync can flicker when your frame rate swings far outside the monitor’s supported range, especially in menus and loading screens. Cap your FPS a few frames below the refresh rate, or turn adaptive sync off to confirm the cause.
Why does my monitor flicker after a Windows update?
Updates sometimes install a graphics driver that conflicts with your monitor. Roll back the driver in Device Manager, or install a clean driver from the manufacturer.
Can a bad HDMI or DisplayPort cable really cause flickering?
Yes. It’s one of the most common causes, particularly at 1440p, 4K, or high refresh rates, where cheap or old cables can’t carry a stable signal. Try a different certified cable before replacing anything else.
Why does only one of my two monitors flicker?
Mixed refresh rates, mixed cable types, or one monitor using a different port or adapter are the usual causes. Match the refresh rates where possible, and swap cables between screens to see whether the flicker follows the cable or the monitor.
My monitor flickers when I wake it from sleep. What should I do?
This is typically a driver or power management issue. Update your graphics driver, check for monitor firmware, and loosen power-saving options in Windows. If you’re troubleshooting a laptop, see our laptop screen flickering guide.
Is my monitor dying if it flickers?
Not necessarily. If the monitor’s own on-screen menu flickers, or it flickers on a second PC with a new cable, hardware failure (backlight, power board, or panel) becomes likely. If the flicker disappears on another device, your PC, cable, or settings are the problem.
Does monitor flickering damage my eyes?
It isn’t known to cause permanent damage, but it can cause eye strain and headaches. Flicker you can’t see is a separate issue caused by dimming methods like PWM. Read what PWM flicker is if you get headaches without visible flickering.
Conclusion
Monitor flickering is usually a simple fix. Start with the cable, since a loose, damaged, or low-quality one causes more flickering than anything else. Next, check your refresh rate, turn off G-Sync, FreeSync, or HDR if you game, and update or roll back your graphics driver. If the flicker follows the monitor to another PC, or shows up in the monitor’s own menu, the hardware is failing, and replacing it is often cheaper than repairing it once the warranty is over.
Work through the fixes in order and you’ll find the cause without spending money on parts you don’t need. If you’re troubleshooting a laptop instead, our laptop screen flickering guide covers the checks that apply to built-in displays.
