Backlight of external keyboard with linux mint

I just bought Redgear Grimm backlight external keyboard to work with linux mint 18.3. The backlight didn't work initially and after some poking around I found /sys/class/leds/ and I am able to turn on the backlight with the following command echo 1 | sudo tee /sys/class/leds/input25::scrolllock/brightness Now here's the problems 1. Pressing Caps Lock key and Num Lock key disables the backlight which should not happen 2. After that the backlight doesn't work even when pressing the Num Lock, Caps Lock and Scroll Lock key(which btw should be the actual key for this function.) The keyboard is fine. Proved by testing it on a Windows laptop.