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The Troubleshooting Guide: PC Screen Turning Off? Get to the Bottom of It!

Is your PC screen suddenly turning off while the fans start spinning faster than you’ve ever heard before? Don’t panic just yet there are several possible causes for this frustrating phenomenon.

In this article, we’ll explore four main culprits, including overheating, hard drive failure, virus infection, and overclocking. Additionally, we’ll provide you with a handy troubleshooting guide for when your computer has a black screen but is still running.

By the end, you’ll have a better understanding of the potential issues and steps to take to resolve them.

Possible Causes of PC Screen Turning Off and Fans Speeding Up

1. Overheating

One common cause of a PC screen turning off abruptly and fans suddenly working at maximum speed is overheating.

It occurs when the internal components become too hot for proper operation. This can be due to factors like dust buildup within the computer, blocking the airflow, or fans not running at full capacity.

Overheating can be prevented by regularly cleaning your computer case to remove any accumulated dust. Additionally, ensure that the fans are running smoothly and not obstructed by any wires or other objects.

If the issue persists, you may need to replace or repair the fans. 2.

Hard Drive Failure

A failing hard drive can also cause your PC screen to turn off unexpectedly. If you start hearing strange noises coming from your computer, experience frequent blue screens, or notice system crashes, it might be a good indication that your hard drive is failing.

To address this issue, you should rely on professional help to diagnose and replace the failing hard drive. It’s essential to backup your data regularly to prevent permanent loss in case of a complete hard drive failure.

3. Virus Infection

Viruses are not only annoying but also potentially dangerous.

They can infiltrate your system, slow it down significantly, and even cause crashes. If you’ve noticed a sudden decrease in your computer’s performance and frequent system crashes, a virus infection might be the culprit behind your screen turning off and fans speeding up.

It’s crucial to have reliable antivirus software installed on your computer. Regularly scanning your system for malware and keeping your antivirus software up to date can help prevent virus infections.

If you suspect your computer is infected, perform a thorough virus scan and follow the software’s instructions to remove any detected threats. 4.


Overclocking refers to pushing the limits of your computer’s hardware to achieve better performance. However, when done improperly, it can lead to overheating, causing your PC screen to turn off and fans to speed up.

When the CPU temperature rises beyond its limits, the computer automatically shuts down to prevent damage. If you suspect that overclocking is causing your issues, you should disable it and return your system to its default settings.

This will help ensure that your components remain within their safe temperature range and prevent potential damage. Additionally, employing proper cooling techniques such as using cooling fans or a liquid cooling system can help prevent overheating.

Steps to Take if Your Computer Has a Black Screen but Is Still Running

1. Basic Troubleshooting Steps

– Check your computer’s case position: Ensure that your computer is properly positioned in a well-ventilated area to allow for adequate airflow.

– Perform fan maintenance: Clean your computer’s fans regularly to remove dust buildup and ensure they operate effectively. – Check for loose wires: Confirm that all internal and external connections are secure and properly connected.

– Disable overclocking: If you suspect overclocking is causing the black screen issue, return your system to its default settings. – Update Windows and drivers: Regularly update your operating system and drivers to ensure compatibility and security.

2. Alternative Troubleshooting Steps

– Utilize a driver updater utility: This software helps identify and install the latest drivers for your system, ensuring optimal performance.

– Rollback graphic drivers: If recently updated graphic drivers are causing the black screen issue, roll them back to a previous version. – Reinstall graphic driver: Completely uninstall and reinstall the graphic driver to resolve any software conflicts.

– Conduct a virus scan: Run a comprehensive virus scan to detect and remove any potential malware. – Uninstall/disable antivirus software: Sometimes, antivirus software can interfere with system processes.

Temporarily uninstall or disable it to troubleshoot the issue. – Perform a clean boot: This eliminates any conflicts caused by startup programs or services.

Instructions for performing a clean boot can be found online for your specific operating system. – Reset BIOS settings: Resetting the BIOS to its default settings can help resolve any configuration-related issues.

By following these troubleshooting steps, you should have a better chance of identifying and resolving the black screen issue.


With the knowledge gained from this article, you can now tackle PC screen turning off and fans speeding up issues with confidence. Remember to address potential causes like overheating, hard drive failure, virus infection, and overclocking.

Additionally, follow our troubleshooting guide when encountering a black screen but a running computer. By being proactive and informed, you can minimize frustration and keep your computer running smoothly.

In conclusion, understanding the possible causes of a PC screen turning off and fans speeding up is crucial for maintaining a healthy computer. Overheating, hard drive failure, virus infection, and overclocking can all contribute to these issues.

By regularly cleaning your computer, addressing hardware problems, updating software, and taking the appropriate troubleshooting steps, you can prevent and resolve these issues. Remember, a well-maintained computer leads to better performance and longevity.

Take care of your PC, and it will take care of you.

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