If the brightness on your laptop has gone really dark this is normally because you’ve hit the keyboard combination for turning down the backlight on your laptop, its easy to fix this problem, if you look on your keyboard you should see an FN Key and you should see either a brightness up and down button (Normally F2 or F3 or Arrow Up and Down Keys) but it varies from every laptop, hold down FN + Brightness Up that should fix your problem.
If that fails to fix the problem refer to your laptop manual.
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Category: Laptop Problems & Solutions