Laptop Screen Black in One Corner: Uncover the Causes and Discover the Most Effective Solutions

A black screen corner on your laptop's display may point to hardware or software issues. This can be a frustrating and costly problem, but don't despair. In this article, we'll uncover the causes and effective solutions for a black screen corner on your laptop.

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Laptop Screen Has a Black Corner: Causes, Diagnosis, and Troubleshooting

A black corner on your laptop screen significantly impairs your device’s usability. In this article, FPT Shop will guide you through the causes, identification methods, and troubleshooting tips for a laptop screen with a black corner.

Causes of Laptop Screen’s Black Corner

The light emitted from laptops is blue light, which inhibits the production of melatonin, a hormone that causes insomnia. Additionally, excessive exposure to radiation from laptop screens can weaken the brain’s defenses, leading to memory loss and sclerosis. Therefore, it’s crucial to understand the causes of a black corner on a laptop screen to prevent health hazards.

Laptop Screen Darkened Due to Power-Saving Mode

Laptops automatically reduce brightness when the battery percentage falls below a certain level, activating the power-saving mode. Even after the battery is fully charged, the laptop may remain in this mode, resulting in a dark corner on the screen.

Faulty Laptop High-Pressure Lamp

The optimal brightness for a laptop is 1000cd/m2. If the high-pressure lamp drops below 1000cd/m2 and malfunctions, it could cause a black corner on the laptop screen.

Incorrect Laptop Screen Refresh Rate

Laptop screen refresh rates range from 60Hz to 160Hz. If the screen drops below these rates, it can lead to a black corner or a blurry display.

Aging Laptop Screen

All laptop components have a limited lifespan. After prolonged use, it’s inevitable that laptops may develop screen problems.

If your work requires extensive laptop usage, it’s recommended to reduce the screen brightness to prevent overworking and potential damage.

How to Check for a Black Corner on a Laptop Screen

You can check your laptop screen for dead pixels using Dead Pixel Locator. This free software helps you easily identify dead pixels on your laptop display.

Once the application is installed, use the left/right arrows to switch between different colors on the screen. If there are dead pixels on your laptop screen, they will appear as different colors from the selected background.

After the check, press the Esc key or the Alt + F4 key combination to exit the interface.

How to Fix a Black Corner on a Laptop Screen

If your laptop screen has a black corner, try these simple and effective troubleshooting methods shared by FPT Shop.

Prepare a clean, soft, and dry cloth. Gently press the black area on the screen using the cloth, ensuring not to apply pressure to other areas. While pressing, turn on the screen and observe if the black spot disappears. If there’s no improvement, it indicates a hardware issue.

How to Prevent a Black Corner on a Laptop Screen

Implement these preventive measures during laptop usage to minimize the risk of a black corner on the screen:

  • Use a genuine shockproof bag to protect your laptop from impact if dropped.

  • Place your laptop on flat and stable surfaces to avoid the risk of accidental damage.
  • Open and close the laptop lid gently and with care.
Frequently asked questions

There could be several reasons for this issue, including a faulty LCD cable, a damaged LCD screen, or a problem with the graphics driver. It could also be caused by a loose connection between the screen and the motherboard.

To fix this issue, you can try updating or reinstalling your graphics driver, or checking for any loose connections between the screen and the motherboard. If the problem persists, you may need to replace the LCD cable or the LCD screen itself.

If you’re experiencing multiple dead pixels, color distortion, or vertical or horizontal lines on your screen, it’s likely that you need to replace your LCD screen. If your screen is flickering or displaying a ‘ghost’ image, it’s possible that your LCD cable needs to be replaced.

You can purchase these parts online from reputable retailers or directly from the manufacturer. Make sure to buy parts that are compatible with your specific laptop model.

Replacing these components can be challenging and may require specialized tools and knowledge. If you’re uncomfortable with the process, it’s best to seek the help of a professional or experienced technician.
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