I posted this in hardware and builds but thought I'd share here as well. If you flashed your bios and backlight is gone or had Motherboard replace and no lights this fixed mine. https://rog.asus.com/forum/showthread.php?94881-Keyboard-backlight-fix

There seems to be an infinite number of fixes post on the web about reinstalling the ATK package. This is fine for those that had a single installation failure. But for those that had a motherboard change or a bad bios flash, that "fix" wont work. I ...