Various problems often occur with laptops. Some devices quickly sit down the battery, because of this, it is impossible to work offline. In some cases, the user does not know why it is impossible to adjust the brightness on the laptop. Sometimes problems concern software failures. Brightness adjustment is on all screens. In stationary PCs, it is easier to adjust, as there are buttons on the monitor for this. In a laptop, you need to use special combinations or OS settings.
Why not adjust the brightness on the laptop
If it is impossible to adjust the brightness, then, most likely, it is a matter of system malfunctions. The most frequent problems include:
- video card drivers;
- screen off;
- lack of automatic updates;
- processor drivers;
- software crashes;
- monitor driver.
How to find the cause
If you can not change the brightness on a laptop, you need to look at the drivers for the video card. This is the most common reason. The problem appears due to the fact that:
- driver is not installed;
- Software removed by the operating system;
- incorrect update;
- the monitor is not active in the "Device Manager".
Graphics card chipset drivers have a similar story. If software has been installed from a third-party source or via automatic update, then not all functions will work.
Some may not be fully displayed, so you cannot even see where the brightness is adjusted. In this situation, you need to download the required drivers from the manufacturer’s website.
How to fix the problem
Most of the users, having tried one of the options for adjusting the brightness, think that it can no longer be adjusted, something has broken, and repairs are needed. But there are many ways to accomplish this, and having adjusted the screen in the future, you can not touch the monitor for a long time.
Function buttons
On the keyboard of any laptop are function keys. As a rule, they are installed on the buttons F1-12. To activate them, you need to press, for example, the combination FN + F3 (taking into account the key on which the icon is depicted).
If everything remains the same and the adjustment scale does not appear on the monitor, the following methods can be considered.
Taskbar (Windows 8, 10)
In the top ten, adjustments are made very quickly if you click on the "Power Options" icon in the task menu. After the left mouse button on the brightness indicator, which must be adjusted to the desired value.
Using the control panel
First you need to go to the "Control Panel", then select the menu "All items" and "Power." Then go to the tab "Setting the power scheme."
Here, the sliders adjust the screen brightness from the battery and from the power grid.
Using a graphics card driver
The quickest way to get into the settings of a graphics card is by clicking the right mouse button on the desktop and from the list that appears you can find graphic parameters (the location of the driver settings will depend on the specific software, in some cases you can access the settings through Windows management).
In the chromaticity parameters, as a rule, there are different settings items: saturation, contrast, color, brightness, etc. You need to find the required parameter and just change it.
Whether the function keys are active
As a rule, the reason why the function keys do not work on the laptop is BIOS settings. Probably, they are simply not active in BIOS.
The choice of menu, where to look for settings in BIOS, will depend on the model of the laptop. For example, in HP devices, you need to check the System Configuration menu: here you need to see if Action Keys mode is active (to activate, you need to set Enabled).
In DELL models, keys can be configured in the Advanced menu - the Function Key option.
No driver function buttons
Probably, the function keys (in particular, which are responsible for the brightness of the monitor) do not work, due to the lack of software.
To determine the universal name of the software in this case (drivers that you can just download and everything will start working) will not work (by the way, you can meet such people on the Internet, it is not recommended to install them).
Taking into account the mobile PC model, the driver is called differently, for example: in HP - "Quick Buttons", in Samsung - "Control Center", in Asus - "Hotkey", in Toshiba - "Utility".
Incorrect software for video card
If before everything worked in normal mode, and when Windows was updated (during the update, another graphics card driver is installed most often) everything stopped working (for example, the brightness setting slider changes on the monitor, but everything remains the same), you can try to roll back installed update.
You should also stay on the disk that came with the laptop, the old working drivers, you can simply install them.
To do this, go to the management Windows, then in the "Device Manager". Then find the menu "Display Adapters". After that, right-click on the installed graphics card and then "Update Driver".
Now find the tab "Search for drivers on the computer." Indicate where the drivers are.
Probably the old software (especially if the version of Windows was simply updated, and not the system was reinstalled) is already on the computer. To determine this, click on the bottom of the window: "Find from the list of installed drivers."
After select the old software and install it. Often this solution helps, as the old software is sometimes much better than the updated one.
Windows Update from 7 to 10
Updating the seven to ten - you can solve the problem with the software for the function keys (especially if you cannot find it). Just in the new operating system is the standard software for the work of "hot buttons".
But it should be noted that this "embedded" software may not be as functional as "native" (some modes may not work, for example, automatic adjustment of contrast taking into account ambient lighting).
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