1. Check whether the laptop design has an adjustable or static keyboard light setting.
2. Check if the laptop has a keyboard light switch key located near the top of the keyboard itself.
3. If the laptop has an adjustable backlight setting, adjust the brightness option for the keyboard.
4. If the laptop has a static light setting, make sure that the setting is enabled.
5. Ensure that the laptop keyboard is plugged into the power outlet and the battery is not completely discharged.
6. Check if the laptop keyboard driver is the latest version.
7. Update the driver if it is not up to date, which can be done from the laptop manufacturer’s website.
8. Reset the laptop’s BIOS settings and try again.