Keyboard backlight Razer Blade 2016

So i got my RB for almost 3yrs now and the backlight of my #2, U, B key either dead or non functioning correctly. To be more specific the #2 key is weaker than other keys in green color, B key is dead on blue color and U key is weak on blue color
I start notice it when i change the settings to white color recently ( i guess RGB only fun at the begining ). So i only using green now cause it seem the least effect.
I just wonder is this a software problem or it just dead LED. I really don't have any problem if it dead cause i've been using it for quite a long time and really don't bother me that much but if there is a quick way to fix it would be nice.