How to fix black lines on laptop screen

How to fix black lines on laptop screen

How to fix Black Lines On Laptop Screen

Experiencing black lines on a laptop screen can be a frustrating issue that affects the overall viewing experience and functionality of your device. Fortunately, many instances of black lines on a laptop screen can be addressed through troubleshooting and, in some cases, simple fixes. In this guide, we will explore common reasons behind these black lines and provide practical steps on how to diagnose and resolve the issue.

How to fix black lines on laptop screen

Whether the problem stems from hardware or software issues, understanding the potential causes and solutions will empower you to restore your laptop screen to its optimal performance. Let’s delve into the steps to troubleshoot and fix those pesky black lines on your laptop display.

Why is There a Line on My Laptop Screen?

The appearance of lines may be on a laptop screen can be attributed to various factors, and diagnose and fix the potential causes can help in diagnosing and resolving the issue. Here are some common reasons why there might be a line on your laptop screen:

Physical Damage

Physical damage to a laptop screen, such as cracks, pressure marks, or impact, is a common cause of lines appearing on the display. The damage disrupts the normal functioning of the screen’s pixels, leading to visual anomalies.

Loose or Damaged Connections

A loose or damaged cable connection between the laptop’s screen and the motherboard can result in the appearance of lines. If the connection is compromised, the signal transmission necessary for displaying images correctly may be disrupted.

Display Driver Issues

Outdated drivers, incompatible graphics card drivers, or hardware issues can also cause display issues, including lines on the screen. Updating the graphics drivers to the latest version can often resolve issues related to driver compatibility.

Malware or Virus Infections

Malware or virus infections may cause various aspects of a computer’s functionality, including the display. Some malicious software may interfere with graphics rendering, leading to visual distortions and malfunction such as lines on the screen.

Display Settings

Incorrect display settings, such as an incompatible resolution or refresh rate, can cause visual abnormalities. Adjusting these settings, change the screen resolution to match the specifications recommended for your laptop’s screen can often eliminate the appearance of lines.


Overheating of internal components, including the graphics card, can lead to display issues. Excessive heat can affect the performance of the GPU, causing visual artifacts like lines on the screen. Ensuring proper ventilation and cooling can mitigate this problem.

7 Ways to Fix Black Lines On Your Laptop Screen

Now that we have explored some common causes of black verticle and horizontal lines on a laptop screen let’s move on to the practical solutions you can try to fix this issue.

Reconnect the Video Cable

The video cable, also known as the display cable, is a vital piece of hardware that transmits video data from the computer to the laptop screen. If this cable is loose or damaged, it may result in black lines appearing on your screen. Here’s how you can check and reconnect the video cable:

  1. Switch Off Your Laptop: First, ensure your laptop is switched off and unplugged from the power source to avoid any electrical accidents.
  2. Open the Laptop: Carefully open your laptop’s casing. This generally involves removing several screws and must be done gently to avoid causing additional damage. Be sure to consult your laptop’s manual or online tutorials specific to your model for guidance.
  3. Locate the Video Cable: Once the casing is removed, locate the video cable that runs from the screen to the motherboard. This is usually a thick ribbon-like cable with a connector at each end.
  4. Check for Damage: Inspect the cable for any visible damage such as cuts or tears. If you notice any damage, you may need to replace the cable entirely.
  5. Reconnect the Cable: If the cable appears intact, gently unplug it and then plug it back into its connectors on both ends. Ensure that it is firmly and properly connected to avoid any loose connections.
  6. Put Everything Back Together: Carefully put your laptop’s casing back together and secure all screws in place.
  7. Turn Your Laptop Back On: Once everything is back in place, turn your laptop on and check if the black lines are still present. If they are, move on to the next solution.

Replacing the Cable (HDMI, Ribbon, Display Port)

If reconnecting the video cable did not rectify the problem, the cable itself might need to be replaced. Each type of cable – HDMI, Ribbon, or Display Port – has a unique replacement method but they all follow the same basic steps. First, switch off your laptop and unplug it from the power source. Open the laptop casing, again being sure to consult your laptop’s user manual or online tutorials for specific instructions related to your device. Identify the faulty cable and gently unplug it from its connectors.

Replace the old cable with a new one, making sure to connect it securely at both ends. Reassemble your laptop and turn it on to check if the black lines have disappeared. For this entire process, it is highly recommended to source a replacement cable that matches the specifications of your laptop to ensure compatibility. If the issue persists after replacing the cable, it may be indicative of a more complex hardware or software issue requiring professional assistance.

Use Display Quality Troubleshooter

The Display Quality Troubleshooter is a built-in Windows tool that can assist you in resolving display issues, like black lines appearing on your laptop screen. To use this, go to your system’s ‘Settings’ and navigate to ‘Update & Security.’ There, you will find a ‘Troubleshoot’ option; click on it. Next, run the ‘Display Quality Troubleshooter’.

It will scan your system for any potential issues and attempt to resolve them automatically. If any problems are detected that cannot be resolved automatically, the troubleshooter will provide recommendations on the next steps to take and fix horizontal and vertical lines on the laptop screen. Remember to restart your laptop after running the troubleshooter to ensure any changes take effect.

Fix System File Corruption

System file corruption could be a potential cause behind the appearance of black lines on your laptop screen. Here’s how you can attempt to fix the issue:

  1. Run the System File Checker (SFC) Tool: The System File Checker tool is a utility in Microsoft Windows that allows users to scan for and restore corruptions in Windows system files. To use the SFC tool, first, open the command prompt as an administrator. You can do this by searching for ‘Command Prompt’ in your start menu, right-clicking on it, and selecting ‘Run as administrator’.
  2. Start the Scan: Once the command prompt is open, type in `sfc /scan now` and press Enter. This command will initiate a system scan which can take some time, so be patient.
  3. Interpret the Results: If the SFC tool finds any corrupt files it cannot fix, it will provide a message like ‘Windows Resource Protection found corrupt files but was unable to fix some of them’. In such a case, you can use the Deployment Image Servicing and Management (DISM) tool to fix the corruption.
  4. Run the DISM Tool: To run the DISM tool, open the command prompt as an administrator again, type in `DISM /Online /Cleanup-Image /RestoreHealth` and press Enter. This tool will fix any corruption that the SFC tool was unable to fix.
  5. Restart Your Laptop: Finally, once the process is complete, restart your laptop. This will allow any changes the SFC and DISM tools made to take effect, hopefully resolving the issue with black lines on your screen.

Update your Graphics Driver

To update your graphics driver, follow these steps:

  1. Identify your Graphics Card: Before updating, you need to know the make and model of your graphics card. You can find this information in the ‘Device Manager.’ Simply press the Windows key + X and select ‘Device Manager.’ From there, expand the ‘Display adapters’ field to see your graphics card.
  2. Visit the Manufacturer’s Website: Each graphics card has a unique set of drivers, which are typically available on the manufacturer’s website. Common manufacturers include Nvidia, AMD, and Intel.
  3. Find the Correct Driver: Navigate to the drivers or downloads section of the website. Enter your graphics card details to find the correct and most updated driver.
  4. Download and Install the Driver: Download the driver and follow the installer’s prompts. It should guide you through the installation process. Be sure to choose ‘custom installation’ instead of ‘express installation’ if you want to avoid any additional software that may come packaged with the driver.
  5. Restart Your Laptop: Once the installation is complete, restart your laptop for the changes to take effect. After your system reboots, the black lines on your laptop screen should hopefully disappear. If they persist, you may need to consider other solutions or seek professional assistance.

Adjust the Screen Resolution

Adjusting the screen resolution might help to resolve issues with black lines appearing on your laptop screen. Follow these steps to adjust the screen resolution:

  1. Open Display Settings: Right-click on your desktop and select ‘Display settings’ from the contextual menu.
  2. Go to Resolution Settings: In the display settings window, scroll down to the ‘Resolution’ section.
  3. Change the Resolution: Click on the drop-down menu under ‘Resolution’ and choose a different option from the list provided. It is recommended to choose the resolution labeled as ‘(Recommended)’ if it is not already selected.
  4. Apply Changes: After choosing a different resolution, click on ‘Apply’.
  5. Check the Changes: A pop-up window will appear to confirm if you want to keep the changes. If the new resolution has fixed the black lines issue, click on ‘Keep changes’. If not, click on ‘Revert’, or wait for 15 seconds and it will automatically revert to the previous resolution.
  6. Restart Your Laptop: Whether the issue is resolved or not, restart your laptop to let the changes take effect completely.

Gently Wipe the Screen with Cotton Balls

If the steps above don’t work, the black lines on your laptop screen may be due to dust or dirt accumulation. Here’s how you can clean your laptop screen:

  1. Turn Off Your Laptop: Before cleaning your laptop screen, ensure that it is switched off and unplugged to avoid causing any damage or getting an electric shock.
  2. Prepare Your Materials: For this process, you will need a few cotton balls and a cleaning solution that is safe for screens. You can either purchase a commercial product or make your own by mixing equal parts of distilled water and white vinegar.
  3. Dampen a Cotton Ball: Dip a cotton ball into the cleaning solution, ensuring it is damp but not soaking wet. You want to avoid any liquid dripping onto your screen.
  4. Gently Wipe the Screen: Using the damp cotton ball, gently wipe the screen in a circular motion. Be careful not to apply too much pressure as this could damage the screen.
  5. Dry the Screen: Once you’ve wiped the entire screen, use a dry cotton ball to remove any excess moisture. Then, let the screen air dry for several minutes before turning your laptop back on.
  6. Check Your Screen: After cleaning, check your screen to see if the black lines have disappeared. If they still exist, further action may be required.

Tips for Avoiding Future Issues with Your HP Laptop Screen:

Ensuring the longevity and optimal performance of your HP laptop screen involves adopting good practices and preventive measures. Here are some tips to fix the problem with your HP laptop screen:

Handle With Care:

Treating your HP laptop with care is fundamental to avoiding screen-related issues. Be gentle when opening and closing the lid to prevent unnecessary stress on the hinges and the screen itself. Avoid pressing too hard on the screen or using excessive force when interacting with the laptop.

Use a Proper Bag:

Invest in a high-quality laptop bag with sufficient padding to protect your HP laptop during transportation. A well-padded bag can absorb shocks and impacts, minimizing the risk of damage to the screen or other internal components. Ensure that the laptop compartment is properly cushioned to provide adequate protection.

Regular Maintenance:

Perform routine maintenance tasks to keep your laptop in optimal condition. Clean the screen using a soft, lint-free cloth to remove dust and smudges. Additionally, clean the laptop’s vents and fans to prevent overheating, which can have adverse effects on the screen and other internal components.

Avoid Extreme Temperatures:

Extreme temperatures can impact the performance and lifespan of your laptop screen. Avoid exposing your HP laptop to direct sunlight for extended periods, and don’t leave it in a hot car or in freezing conditions. Operating your laptop within the recommended temperature range helps maintain its overall health, including the screen.

Backup Your Data:

Regularly back up your important data to prevent loss in the event of unexpected issues or failures. While not directly related to the physical condition of the screen, data loss can be a significant concern. Backing up your data ensures that even if there’s a problem with your laptop, your important files and information remain safe and can be easily recovered.

Update Graphics Drivers Regularly:

Keep your graphics drivers up to date. Check for updates on the HP support website or through the device manager. Updated drivers often include bug fixes and optimizations for better display performance.

Protect Against Malware and Viruses:

Install and regularly update reliable antivirus software to protect your laptop from malware and viruses. Malicious software can impact various aspects of your laptop’s functionality, including the display.

Adhering to these tips will not only help preserve the physical integrity of your HP laptop screen but also contribute to the overall longevity and performance of your device. Regular care and precautionary measures can go a long way in preventing potential issues and ensuring a reliable computing experience.


Addressing black lines on a laptop screen requires a systematic approach to troubleshooting, considering both hardware and software factors. By examining potential issues such as loose connections, graphics card problems, physical damage, and software glitches, users can identify and resolve the root cause of the problem. Regular maintenance, proper handling, and adherence to recommended settings contribute to preventing such issues in the future. If the problem persists or if it is hardware-related, seeking professional assistance may be necessary to ensure a comprehensive and effective solution.


Why are there black lines on my laptop screen?

Black lines on a laptop screen can be caused by various factors, including loose cable connections, graphics card issues, physical damage, software problems, incorrect display settings, or even malware infections. Identifying the specific cause is crucial for effective troubleshooting.

How can I fix the black lines on my laptop screen caused by loose connections?

If loose cable connections are the issue, carefully check and secure the cable connecting the laptop screen to the motherboard. Ensure it is properly seated and undamaged. Reconnecting or replacing the cable may be necessary.

Can outdated graphics drivers cause black lines on the screen?

Yes, outdated or incompatible graphics drivers can contribute to display issues, including black lines. Updating the graphics drivers to the latest version can often resolve such problems.

Is it possible to fix the black lines caused by physical damage to the screen?

Unfortunately, if the black lines result from physical damage to the screen itself, it may be challenging to fix without replacing the damaged component. Consult with a professional technician for advice on potential repairs or replacements.

How can I prevent black lines on my laptop screen in the future?

To prevent future issues, handle your laptop with care, use a proper laptop bag for transportation, perform regular maintenance, avoid extreme temperatures, and back up your data. Additionally, ensure your graphics drivers are up to date and your display settings are correctly configured.

When should I seek professional help to fix the black lines on my laptop screen?

If the troubleshooting steps outlined in this guide do not resolve the issue, or if the problem is related to hardware components like the graphics card or screen, it’s advisable to seek professional help. Technicians can provide a thorough diagnosis and recommend appropriate solutions for more complex issues.

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