When we use a laptop, sometimes the screen of laptop is become dark suddenly, which is usually caused by the user accidentally pressing the wrong keys or the notebook enters the power-saving mode. Of course, this is not absolute, and the error of laptop hardware also can make the laptop screen very dim.
You can connect an external monitor to check.
①If the screen is also dim, you maybe need to adjust the computer brightness setting.
②If the external display is bright and clear, it should be that the screen hardware of the laptop is damaged.
Different reasons should be solved indifferent ways.
1: Press the Keys by Mistake
Most laptops have brightness control shortcuts on the keyboard. If you touch the screen accidentally, it may dim the laptop screen and you can't find the reason. The “SUN” icon can be found on the key; if the icon is blue or gray,you need to use the “function keys” to adjust the brightness. If the screen darkens further, tap the adjacent key to increase the brightness of screen.
2: Laptop Work in the Power Saver Model
1. Check if your laptop is connected to the power source. When you use the laptop battery only, your notebook may start an energy saving program to extend battery using life and the laptop screen went very dim. You can check if the power adapter and cord of the laptop are properly connected and then restart the notebook to return.
2. Change the Power Saver mode: If the laptop battery is your only power source, you can use the power options to changing the power save mode. With this method, you can laptop screen dimming randomly.
- Right Click “Power Options” in the desktop, then click “Change plan settings” to select power mode.
- You can use the “Adjust plan brightness”to change screen brightness
- on the other hand, there is a “Create a power plan”, you can create a “balanced” mode or “high performance”. It will solve the problem of laptop screen dim in windows 10/windows 8/windows 7.
3: Laptop Hardware Error
Laptop hardware error can also cause screen dimming and there are 4 common hardware problems:
①Laptop motherboard
The motherboard does not have enough voltage or the high voltage and the motherboard will error, aging and short circuit failures. Most of these faults need to be replaced the motherboard to solve the problem.
②Display screen cable
Wear and break of the screen cable can also cause the laptop screen to become dimmer.You need to replace the LCD/LED cable to solve this problem.
③LED back light
The illumination of the notebook screen is realized by the physical principle of the LED back light. If the screen is completely dark, the display of the screen will invisible. The LED back light may be broken, and the laptop screen needs to be replaced.
You may also want to know: How much does it cost to fix the screen dimming?
When you find that there is a hardware problem that makes your notebook screen dim, you should check the notebook's warranty first. If it is under warranty, return the computer to the service center and apply for free repair.After the warranty period, you need to pay some fees and replace the hardware. Screen Cable usually cost less than $20, and it is more expensive to repair the motherboard or laptop screen. If you need to buy high quality screen accessories at reasonable price, you can go to the Gemwon online store to pick and buy. They offer fast delivery and 7x24 hour after-sales service to give you the perfect shopping experience.It can help you quickly solve the problem of dim laptop screen.
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