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.