keyboard backlight is not turning on

[aya98]

good evening i have an EliteBook 840 G3 notebook PC and recently the keyboard backlight has turned off because i lifted the laptop from under the touch pad so i thought maybe i damaged the compartiment responsible of the light

can you please help me how to know the problem and thank you

[banhien]

@aya98 

Does your machine have a F* key with backlit symbol     ?

•  If NO, it does not have backlit keyboard.
• If YES, please use the following Guide

                 https://www.hp.com/us-en/shop/tech-takes/turn-keyboard-lighting-on-off

                 https://support.hp.com/in-en/document/c01612362

Regards.

[aya98]

yes my pc does have the light Botton but light has turned off suddenly without turning back so i want to know what shoul i check first (my pc is hp EliteBook 840 G8) 

[banhien]

@aya98 

Please try

1. Run Keyboard troubleshooter:

Go to Settings > System > Troubleshoot.
Select Other Troubleshooters
Scroll down and select Keyboard, then click on Run.

2. Press Windows + X > Select Device Manager
Expand the Keyboards section.
Right-click on your keyboard driver and select Uninstall
Click Uninstall.
Restart your computer.

More  info:   backlit keyboard not working! 

Regards.