New Mechanical Keyboard

Hey guys I just got my new cooler master tk in the mail today and one of the led is not responding the key is "i" . I'm not sure if it was working when i pulled it out and plugged it in becouse i had to go to work but is their a way to illuminate individual keys on these keyboards. My brother was playing with my keyboard and he might of accidentally disabled one of the led's? But i have no idea how to turn it back on.

Thanks, Luke

its broken.

Haha yer i contacted the seller he is going to do a exchange