ASUS ROG STRIX III LED green does not work?

I have a little problem… I have had the laptop mentioned above for a good 1 year now, which has a keyboard backlight (Asus Aura Sync). So far I only wore static red and just wanted to change it. Now I noticed that key 4 (number pad) no longer creates any color tones with a green component. Can it be that the LED is defective or is it a software error? I actually just pulled updates on it.

Can be of course, but it's not so dramatic that you would send the device in, right?

Red is also a nice color '' :-)