Multimedia Keyboard Gembird KB-9140L - keys don't show ligh when I press 'scroll lock'


I have a Multimedia keyboard Gembird KB-9140L on my PC and I use Fedora 31 KDE.

When I press ‘scroll lock’ the regular keys don’t light (bulb) up and I’m not sure if all of the multimedia keys are working.

Here is a image of the keyboard: