How to Fix Monitor Problems in Windows 10

You turn on your PC and the monitor says “No Signal.” Or the screen flickers every few seconds. Or your second monitor simply does not show up, no matter how many times you plug it in. Monitor problems are some of the most annoying issues on a Windows 10 computer, because if you cannot see anything, you cannot fix anything.

The good news is that most monitor problems come from a handful of simple causes: a loose or faulty cable, the wrong display setting, or a graphics driver that needs attention. Real hardware failures are much less common than people think.

In this guide, we will walk you through how to fix the most common monitor problems in Windows 10, step by step, using Microsoft’s own troubleshooting advice wherever possible. We will start with quick checks and move on to deeper fixes only if you need them.

Quick Info: Fixing Monitor Problems in Windows 10

Key Takeaways

• Always start with the cable, power, and input source. These fix a large share of monitor problems.
• Press Windows key + P to make sure Windows is actually sending a picture to your external monitor.
• Use Windows key + Ctrl + Shift + B to refresh the display when the screen goes black but the PC is still running.
• Microsoft says screen flickering is usually caused by a display driver or an incompatible app. Task Manager helps you tell which.
• Update, roll back, or reinstall your graphics driver when display problems start after an update.
• If problems appear on every PC you connect the monitor to, the monitor itself is probably faulty.

Important Note About Windows 10

Microsoft ended support for Windows 10 on October 14, 2025. Your PC still works, and the fixes in this guide still apply, but Windows 10 no longer receives regular free updates or security fixes. Some newer monitors, graphics cards, and drivers may also be tested mainly on Windows 11. If you keep running into driver problems, upgrading to Windows 11 (if your PC is eligible) may help in the long run.

Step 1: Do the Basic Hardware Checks First

Before touching any settings, rule out the simple things. Microsoft’s own monitor troubleshooting guide starts with these same hardware checks.

1. Check the power. Make sure the monitor’s power light is on. Press the power button on the monitor itself.
2. Reseat the cable. Unplug the video cable (HDMI, DisplayPort, DVI, or VGA) from both the monitor and the PC, then plug it back in firmly.
3. Try a different cable. Cables fail more often than monitors. A spare HDMI or DisplayPort cable is a cheap way to test.
4. Check the input source. Use the buttons on the monitor to open its menu and select the correct input, such as HDMI 1 or DisplayPort.
5. Try a different port. Use another port on your PC or monitor.
6. Test the monitor on another device. If it does not work with a different PC or laptop either, the monitor may be faulty.

Desktop PC tip

If your desktop has a separate graphics card, plug the monitor into the graphics card’s ports, which are usually lower down on the back of the PC. The ports near the top (on the motherboard) are often disabled when a graphics card is installed.

Step 2: Fix “No Signal” or a Blank Monitor

If the monitor is on but says No Signal, No Input, or stays black:

• Recheck the input source on the monitor.
• Make sure the PC is fully awake. Move the mouse or press a key.
• Press Windows key + P and choose Duplicate or Extend. If Windows is set to PC screen only, it will not send a picture to an external monitor.
• Restart the PC with the monitor already connected and turned on.
• If you use an adapter (USB-C to HDMI, DisplayPort to HDMI, and so on), try without it or with another adapter.
• If the screen stays black but you hear the PC running, try Windows key + Ctrl + Shift + B (see Step 4).

Step 3: Fix a Second Monitor That Is Not Detected

Microsoft’s guide to external monitors suggests first pressing Windows key + P to make sure Extend is selected. Then try these steps.

Use the Detect button

1. Right-click an empty area of your desktop and choose Display settings.
2. Scroll down to Multiple displays.
3. Click Detect.

If Windows finds the monitor, it will appear as a numbered box at the top of the page.

Check the multiple displays setting

In the same Display settings page, look at the Multiple displays drop-down and choose Extend these displays or Duplicate these displays. If it is set to show only on one display, the other monitor stays dark.

Check what your hardware supports

Microsoft also points out a few important limits:

• If one external monitor works but a second or third does not, your graphics card may not support that many monitors. Check with its manufacturer.
• A simple display splitter cannot extend your desktop to two monitors. It only copies the same signal.
• If your PC has only one video output port, it normally supports only one external monitor. You would need a dock, an adapter that supports multiple displays, or another port to add more.

Step 4: Use the Windows Key Sequence to Refresh the Display

When your screen suddenly goes black, freezes, or shows glitches while the PC is clearly still running, try this keyboard shortcut:

Windows key + Ctrl + Shift + B

Press all four keys at the same time. You may hear a short beep and see the screen flash black for a moment. This tells Windows to refresh its graphics system, and it often brings the picture back without restarting your PC.

Microsoft lists trying a Windows key sequence as one of its steps for monitor problems. This shortcut helps only with software or driver glitches. It cannot fix a loose cable, a monitor that has no power, or broken hardware.

Step 5: Fix Screen Flickering

Microsoft says screen flickering in Windows 10 is usually caused by either a display driver issue or an incompatible app. Here is how to tell which one.

Check whether Task Manager flickers

1. Press Ctrl + Shift + Esc to open Task Manager (or press Ctrl + Alt + Delete and choose Task Manager).
2. Watch the Task Manager window.

If an app is the cause

• Update the app. If it came from the Microsoft Store, check for updates there. Otherwise, download the latest version from the developer’s website.
• Uninstall apps you installed recently, one at a time, restarting after each, until the flickering stops.

Some apps simply do not work well with certain Windows versions or drivers. Our guide on what software compatibility is explains why this happens.

Other flickering causes to check

• Loose or damaged cable. Reseat or replace it.
• Wrong refresh rate. Set it correctly (Step 8).
• Nearby electrical interference. Move phones, speakers, or power bricks away from the monitor and cable.
• Faulty monitor. If it flickers on every PC, the monitor may need repair.

Step 6: Update, Roll Back, or Reinstall Your Graphics Driver

The graphics driver is the software that lets Windows talk to your graphics card and monitor. When it is outdated or broken, you can get black screens, flickering, wrong resolutions, or missing monitors. Drivers are a type of system software, which our guide on what system software is explains in plain terms.

Microsoft recommends rolling back the driver if Windows Update recently changed it, and otherwise updating or uninstalling it.

Open Device Manager

1. In the search box on the taskbar, type Device Manager and open it.
2. Click the arrow next to Display adapters to expand it.
3. You will see your graphics card, such as Intel, AMD, or NVIDIA.

Roll back the driver (if problems started after an update)

1. Right-click your graphics card and choose Properties.
2. Open the Driver tab.
3. Click Roll Back Driver and follow the prompts.
4. Restart your PC.

If the button is greyed out, there is no older driver to go back to.

Update the driver

1. Right-click your graphics card and choose Update driver.
2. Select Search automatically for drivers.

For the newest drivers, visit your graphics card maker’s website (Intel, AMD, or NVIDIA) or your laptop or PC maker’s support page, and download the driver for your exact model and Windows 10. Keeping drivers current fixes many bugs, as our article on why software needs updates explains.

Uninstall and reinstall the driver

1. Right-click your graphics card and choose Uninstall device.
2. Tick Delete the driver software for this device if it appears, then click Uninstall.
3. Restart your PC. Windows will try to reinstall a driver automatically.
4. Then install the latest driver from the manufacturer if needed.

The screen may look low-resolution for a moment during this process. That is normal until the driver is reinstalled.

Step 7: Fix Blurry, Stretched, or Wrong-Size Display

If text looks fuzzy or the picture looks stretched, the resolution or scaling is probably wrong.

1. Right-click the desktop and choose Display settings.
2. Click the monitor you want to fix at the top (click Identify if you are not sure which is which).
3. Under Display resolution, choose the option marked (Recommended). This matches your monitor’s native resolution and gives the sharpest picture.
4. Under Scale and layout, set the size of text and apps. 100% to 150% is common. Choose the Recommended option if you are unsure.
5. Under Display orientation, make sure it says Landscape unless you rotate your monitor on purpose.

If the Recommended resolution does not appear or is too low, your graphics driver may need updating (Step 6), or your cable or adapter may not support that resolution.

Step 8: Fix Choppy Movement by Checking the Refresh Rate

The refresh rate is how many times per second the screen updates. A rate that is too low makes the mouse and videos look choppy.

1. Open Display settings.
2. Scroll down and click Advanced display settings.
3. Choose your monitor from the drop-down if you have more than one.
4. Click Display adapter properties for Display (with your monitor’s number).
5. Open the Monitor tab.
6. Under Screen refresh rate, select the highest rate your monitor supports, such as 60 Hz, 75 Hz, 144 Hz, or higher.
7. Click Apply and OK.

If you cannot select a high refresh rate, check that your cable supports it. For example, many high-refresh monitors need a DisplayPort cable or a newer HDMI cable.

Step 9: Fix Wrong, Washed-Out, or Yellow Colors

• Turn off Night light. Go to Settings > System > Display and switch Night light off. It makes the screen look yellow or orange on purpose.
• Calibrate your display colors. Type Calibrate display color in the taskbar search box and follow the built-in tool.
• Check HDR. If you have an HDR monitor, colors can look washed out in Windows when HDR is on. Try turning it off under Windows HD Color settings in Display settings.
• Reset the monitor’s own settings. Use the monitor’s menu buttons to restore factory settings.
• Check the cable. A damaged cable can cause odd colors or a pink, green, or purple tint.

Step 10: Fix a Monitor That Goes Black After Sleep

If your monitor stays black after the PC wakes up:

1. Move the mouse or press a key, and wait a few seconds.
2. Press Windows key + Ctrl + Shift + B.
3. Turn the monitor off and on with its power button.
4. Update the graphics driver (Step 6).
5. Check power settings: go to Settings > System > Power & sleep and adjust how long before the screen turns off.

Step 11: Fix Brightness Problems

• On a laptop: Use the brightness keys or go to Settings > System > Display and adjust the brightness slider.
• On an external monitor: Brightness is usually controlled with the buttons on the monitor itself, not in Windows.
• If the brightness slider is missing or does nothing on a laptop, update or reinstall the graphics driver.
• Check whether battery saver is reducing screen brightness on a laptop.

Step 12: Use the Windows Troubleshooter

Windows 10 includes troubleshooters that can sometimes find and fix hardware problems.

1. Open Settings > Update & Security > Troubleshoot.
2. Click Additional troubleshooters.
3. Run any troubleshooter related to your problem, such as hardware and devices if available.

Available troubleshooters can differ depending on your Windows 10 version.

When It Is Probably a Hardware Problem

Some symptoms point to physical damage rather than settings. These usually cannot be fixed with software:

If you see any of these, stop using the monitor if there is a burning smell, and contact the manufacturer or a qualified repair service. Check if it is still under warranty first.

Monitor Problem Fix Order at a Glance

Frequently Asked Questions

Why does my monitor say No Signal in Windows 10?

Usually the cable is loose, the monitor is on the wrong input, or Windows is set to show the picture only on another screen. Reseat the cable, check the input, and press Windows key + P.

Why is my second monitor not detected in Windows 10?

Check the cable and input first, then press Windows key + P and choose Extend. In Display settings, click Detect. Also make sure your graphics card supports multiple monitors.

What causes screen flickering in Windows 10?

Microsoft says it is usually a display driver issue or an incompatible app. If Task Manager flickers too, it is likely the driver. If Task Manager does not flicker, it is likely an app.

What does Windows key + Ctrl + Shift + B do?

It refreshes the Windows graphics system. It can bring back a black or frozen screen without restarting your PC, but it only helps with software glitches.

How do I roll back my graphics driver in Windows 10?

Open Device Manager, expand Display adapters, right-click your graphics card, choose Properties, open the Driver tab, and click Roll Back Driver.

Why does my screen look blurry?

Your resolution is probably not set to the monitor’s native resolution. Choose the Recommended resolution in Display settings.

How do I change the refresh rate in Windows 10?

Go to Display settings > Advanced display settings > Display adapter properties > Monitor tab, and choose the highest supported refresh rate.

Can a bad HDMI cable cause monitor problems?

Yes. Faulty or low-quality cables can cause no signal, flickering, wrong colors, or a lower resolution and refresh rate.

Is my monitor broken?

If the same problem appears on different PCs and with different cables, or you see permanent lines, cracks, or dead pixels, the monitor is likely faulty.

Do these fixes work on Windows 11 too?

Most of them do, although menu names and locations are a little different in Windows 11.

Final Thoughts

Most monitor problems in Windows 10 are easier to fix than they look. Start with the basics: power, cable, input source, and Windows key + P. If the screen flickers or goes black, use Task Manager to find the cause and try the Windows key + Ctrl + Shift + B shortcut. When problems start after an update, rolling back or reinstalling your graphics driver is often the answer.

Work through the steps in order, and in most cases your screen will be back to normal in a few minutes. If not, the checks in this guide will at least tell you whether it is time to repair or replace the monitor.

References

• Microsoft Support: Troubleshoot external monitor connections in Windows
• Microsoft Support: Troubleshoot screen flickering in Windows

Disclaimer

This guide is for general information only. Menu names and settings may vary depending on your Windows 10 version, graphics card, and monitor model. Windows 10 reached its end of support on October 14, 2025, so some drivers and features may no longer be updated. Always download drivers only from Microsoft or your hardware manufacturer’s official website. TechOriginHub is not affiliated with Microsoft or any hardware maker, and this article is not sponsored. If your monitor shows signs of physical damage, smells of burning, or has electrical problems, stop using it and contact the manufacturer or a qualified technician.