Alienware 18 backlight isn't working (someone help me quick)

4 days ago i got my Alienware 18'  everything was fine but yesterday the keyboard backlight stopped working i don't know why and i have no clue what to do its not on dark mode but it wont turn on. Can someone help me quickly. I leave in 2 weeks on a trip and i wont be back in a long time i need a fix quick !