Fixes most keyboard backlight issues with Asus laptop. Especially targeted to those whom lost their backlight after bios update or motherboard replaced or revived from bricked motherboard.
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Step 1: Check keyboard Backlight Hardware!
Step 2: Download lastest ATKACPI Driver + Keyboard FIlter Utility!
Step 3: If Above Doesn’t Work, Use Asus Powerful Bios Tool BT Utility fix!
Be extra careful when using Asus BT Utility, I am not responsible for any damage!
Rufus: goo.gl/j17SAO
Asus BT Utility in zip file: https://goo.gl/Hc5Sn0
Forum Source: http://forum.notebookreview.com/threads/n56vz-keyboard-backlight-problem.701468/page-2#post9448488