You’re working on your computer doing a sensitive task when the screen suddenly goes green.
While it can be frustrating, it may also worry you if it’s never happened before.
That’s even more troubling if the green screen doesn’t go away and prevents you from accessing the Windows interface.
However, the good news is that, unless it results from a broken monitor or video card, you can solve it through simple solutions.
Computer Screen Turns Green (Causes, Fixes)
1. Temporary Glitches
Every electronic device may develop occasional temporary glitches that manifest differently.
You may experience crashes or artifacts on the screen, unusual noises from the speakers, or any other strange behavior across the board.
These glitches are usually not serious and will go away easily, especially if it’s a one-time thing.
How To Fix
The simple fix to temporary glitches is the good old restart.
Restarting the computer helps the system work more smoothly by flushing the RAM and removing any minor issues that prevent it from working properly.
You should restart the computer through the start menu if you can access your computer interface.
However, if you have a solid green screen, you must hard reset your computer by pressing its reset button (if there is one) or long-pressing the power button.
Remove all the power cords and wait a few minutes to let the screen cool down.
Overheating can also cause various display issues, including color and image distortion.
After turning the computer on, check whether the green screen comes back.
If so, try the other solutions suggested in this article.
2. Faulty Connections
After restarting the computer, the first thing you should look for is broken, weak, or faulty connections.
The monitor cables transmit three primary colors—red, green, and blue—from the graphics card to the monitor to display.
Pins on either end of the cable are responsible for carrying each of these colors.
If the pins that transmit red and blue are faulty or can’t connect perfectly with the monitor’s in-ports, you only get the green color.
This weak connection can be anywhere from the beginning to the end, from the graphics card’s port, along the length of the cable, to the monitor ports.
How To Fix
You should rule out a faulty connection by checking all the elements between the two ports.
If the wires inside the cables are damaged, you should change the cable entirely.
Start by unplugging and re-plugging the connections on the graphics card’s ports and the monitor’s in-ports.
If you have a VGA connector, the screws may have come loose, so tighten them.
In addition, dust and dirt buildup can prevent the pins from making full contact.
After unplugging the pins, take a microfiber cloth or Q-tip and dip it in rubbing alcohol to clean the ports.
This way, you’ll rule out loose connections and make sure the pins make firm contact.
Next, you should ensure the wires and cables aren’t damaged by carefully inspecting them and looking for bends, cuts, or frayed wires.
The best way to ensure working connections is to use a different cable belonging to a different port.
Sometimes the pins inside the ports or the wires inside the cables are broken, and you can’t see them.
Switching to another connection type can help you rule out this possibility.
For example, if you use a VGA port, replace it with an HDMI port and cable and see how it goes.
Using the most modern connection types is always recommended because they’re more reliable and less likely to develop issues.
If your system supports HDMI or DisplayPort, it’s better to use one of them.
Inspecting Laptop Connections
Your laptop’s monitor can be more difficult to inspect because it has internal wiring that requires enough technical know-how to remove.
You’ll need to open the bezel to access the ribbon cable, which can be challenging to detach and reattach.
In addition, each laptop model has a different mechanism to connect the monitor to the main panel.
Instead, you can connect your laptop to another display and see if the second monitor displays a green screen, too.
If so, your laptop monitor is okay, and you should look for issues elsewhere.
Otherwise, take your laptop to a technician to fix the monitor.
3. Incompatible Peripherals
If you’ve connected different peripherals, like USB devices, to your computer, you may experience incompatibilities and connection issues interfering with your display.
That’s particularly the case if you have too many devices connected to the same computer.
Therefore, you should identify the problematic peripheral.
How To Fix
The first step to identifying the problematic peripheral is to disconnect everything attached to your computer.
If the green screen goes away, it shows one of these devices is the culprit.
Now, connect the devices one at a time and check if the screen goes green again.
After finding the culprit, you should remove it permanently or find the underlying cause.
4. Graphics Card Issues
Your graphics card is the primary component that needs to work properly to display images and colors flawlessly.
If your graphics card is faulty, you may get beeps upon bootup after the BIOS POST.
In such cases, all other functions will shut down, and you can’t keep your computer on.
Still, if you don’t receive these alarming beeps, you shouldn’t ignore a faulty graphics card.
A. Reset The Graphics Driver
Before examining the hardware, let’s try some software solutions and see if they help make the graphics card functional.
Resetting the graphics driver is one of the best recommended solutions that can remove display issues.
The best way to reset the graphics drivers is the keyboard shortcut.
Press the Windows key, Shift, Ctrl, and B simultaneously, and you’ll hear a beep followed by screen flashes indicating the drivers are reset.
You can reset the drivers through Device Manager if this method doesn’t work.
Right-click the Start button and select Device Manager from the list.
Go to Display adaptors and expand the menu to see your graphics card.
Right-click it and select Disable device.
Then, re-enable the driver through the same steps and select Enable device.
B. Update Graphics Drivers
If you’ve never updated your graphics card drivers, maybe it’s time to do so now.
Outdated drivers can create various functional and security issues for your hardware because they act as bridges between the hardware and the operating system.
To update the graphics card drivers, go to Device Manager, expand the menu under Display adapters, and select your graphics card.
Right-click the card and select Update driver > Search automatically for updates.
Wait for the utility to download drivers and install them.
Restart your computer and see if the green screen comes back.
C. Roll Back The Drivers
Although updating drivers is always recommended, it may sometimes deliver unforeseen results.
For example, the new updates may be buggy, creating issues in your hardware.
If the green display appeared after a recent update, that might be the case.
Try rolling back to the previous update and see how things go.
If you still have the green screen, you can update the drivers again to enjoy the latest features and try other solutions.
D. Lower GPU Temps
High temperatures can affect all your hardware, including the monitor and the GPU.
If you perform GPU-intensive tasks, don’t clean your computer internals regularly, or keep your computer in a hot or poorly-ventilated place, your GPU may get too hot.
High GPU temps can cause various display issues like distorted images or green screens.
You should first make sure the GPU temps are higher than normal.
You can use the Task Manager or the graphics card’s control panel to monitor its temps.
If the temps are unusually high over a long period, take action to lower the temps.
Changing the thermal paste, cleaning the video card and other internal components, and upgrading the cooling system can help reduce your GPU temps.
E. Check GPU Connections
If you suspect GPU issues, let’s hope it has physical problems like loose connections.
Checking a desktop computer’s internal parts is easier than a laptop.
Still, you may need a technician to look at your device if you lack technical skills.
To check your desktop’s graphics card, turn off the computer and unplug all the power cords and connections.
Take extra precautions and turn off the power button on the back of the case.
Press the power button and hold it for a few seconds to drain the static charge.
After grounding yourself, you can touch the GPU and check its connections.
You can take it out of the case by removing it from the PCIe slot and then reattaching it.
If it has its own power supply, switch it off and on to reset the connection.
F. Broken Graphics Card
To ensure your graphics card is broken, the only way is to replace it with another card that you’re sure is functional.
You could borrow one from a friend or another computer.
Follow all safety precautions to avoid hurting yourself and damaging the other components.
After connecting the new graphics card, turn on the computer and see if it works.
If so, it’s time to get a new graphics card.
Alternatively, you can use your onboard graphics card instead of the dedicated card.
Most computers come with an internal graphics card, and users add an external card to improve their graphical output.
If that applies to you, disable the external graphics card from the Device Manager, or remove its cables from the monitor.
Then, enable your internal video card on the Device Manager and attach its cables to the monitor.
5. Wrong Settings
Have you recently changed the display settings of your monitor or computer?
If so, it’s better to revert them to the default settings because the original settings are the best at giving you a balanced color combination.
Changing the color settings may make a specific color, like green, more salient.
Most monitors have buttons on the side or back to change and adjust settings.
Open the color and display settings and set all of them to default.
You could also manually select color balances through the Color Management menus on your monitor.
This menu could also be labeled Color Temperature and contains three colors red, green, and blue.
After finding the menu, set the color temperature for all of them at the same value.
In addition to separate monitor settings, you can change your display settings through Windows.
Right-click a blank spot on your desktop and click Display Settings.
Scroll down and select Advanced display settings.
Under Display information, select Display adapter properties for display 1 (or 2 if you have two displays and your second display is problematic).
In the new window, go to the Color Management tab and select Advanced.
Make sure all the values are set to System default.
Then, click the Calibrate display button to balance different aspects of your display.
Since your problem here is related to color balance, you can skip all other options to reach Adjust Color Balance.
Click Next for each option until you reach the Adjust color balance window, where you can see three sliders for colors red, green, and blue.
Move the slider for each color all the way to the right to keep it at the maximum level.
Click Next to complete the process and check if the green screen comes back.
6. Hardware Acceleration
When you perform resource-intensive jobs on your computer, hardware acceleration can help reduce the load on specific hardware.
For example, the GPU performs processing tasks to take the load off the CPU.
This way, you accelerate the task without taxing one specific component.
That’s particularly normal with web browsers, which have to show many elements and require lots of processing power.
However, hardware acceleration can sometimes lead to instabilities, especially in the display.
That’s because it can increase the load on the GPU, making it unable to function properly, displaying artifacts or green screens.
How To Fix
The simple fix to this issue is to disable hardware acceleration.
You can disable hardware acceleration within Windows through Display settings.
Right-click a blank spot on your desktop and click Display Settings.
Go to Advanced display settings in the Display window and click Display adapter properties.
Go to the Troubleshoot tab and select Change settings.
If you can’t see the Troubleshoot Tab or the Change Settings option is disabled, you should update your graphics card driver.
After selecting Change settings, you can see a slider under Hardware Acceleration.
Move the slider to None and save changes.
You can also disable hardware acceleration for specific programs like browsers.
To do so, you should go to your default browser and disable it from its settings.
For Chrome, go to Settings > System and turn off Use hardware acceleration when available.
For Firefox, go to Settings > General > Performance > Use hardware acceleration when available.
7. Virus Infection
You should always consider a virus infection for any unexpected issue with your computer, including a green screen.
Run a full system scan to ensure your system is clean.
If the green screen issue appears after installing a new app, uninstall the app because it may contain a virus or present system incompatibilities that clash with your hardware.
8. Faulty Monitor
If none of the above solutions work, your monitor may be at fault, especially if it’s old.
Even if it’s new, it may have damaged internal components that interfere with its color output.
The only way to be sure is to connect your computer to another display.
If the second monitor works without the green screen, your monitor is faulty, and you should take it for repair or consider replacing it.