Backlit Keyboard for W540 Doesn't Work

Howdy, so I work in the IT department at my university and we are currently testing the W540 for the incomin freshmen. I know that I have the backlit model (04Y2465 - Backlit KBD US English Liteon- Secondary), yet the backlight for the keyboard does not work. I can see the icons appear on the screen when I use fn + space, but it makes no difference. We've handled W530s, of which all have working backlights for their keyboards.
Does anyone know of any solutions for this? Problem is occuring on the 20BG and the 20BH.
CPU: i7-4800MQ
RAM: 20GB 1600MHz
GFX: Quadro K2100M
Storage: 256GB SSD + 1TB 7200RPM HDD
Display: 15.5" 2880 x 1620
Keyboard: 04Y2465 - Backlit KBD US English Liteon- Secondary

Good call on the W520 mistake, I was mixing that one up with something else. Yes, my BIOS are up-to-date.
FRU Part Number: 04Y2465
Description: Backlit KBD US English Liteon- Secondary
I used the W540 FRU List for the 20BG and 20BH.
EDIT: I'm not sure what you mean by the light icon, unless you're referring to the icon physically printed onto the spacebar itself. In that case, the light rays are pointing up.
Also, we've given out 3 W540s to teachers and my boss also has one as well, and they all are having the same issue.

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