Did you make any software changes recently after which the backlighting stopped working? If so, then you should try uninstalling that software and see if it fixes the issue.They may look differently depending on the brand of laptop you own. This key can be different for different models of laptops. The first thing to do, press the FN + Spacebar to turn the backlighting ON or OFF.
Here, we will list the most common solutions to fix the problem. Unlike many other issues, the backlight issue of not working on your computer can be composed of several different reasons but not all of them might not be applicable in your case. Popular fixes for Backlight not Working in Windows
