After this is done select Start – Change brightness – now try to lower or increase brightness. To rule out any software issues, install the original drivers and in Control Panel – Power – select Best performances. This usually happens when the laptop is very old or when it’s display has been replaced. Laptop brightness not working problem can also be caused by a physical issue with the laptop’s display. To fix the brightness issue we recommend installing drivers from producers site, having latest updates, for each laptop model. If you have this problem after installing Windows, most probably the video driver is incomplete (Windows drivers are standard) or it was not installed. The laptop brightness problem can occur because of bad drivers, power settings in Windows, laptop’s display, etc. Laptop brightness not working – this is one of the most common issues users encounter with laptops, causes can be multiple but most of the cases the issue was solved by re-installing drivers.
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