G551JM backlit problem

[phamminh2110]

Hi, my backlit is not working since i downgrade from win 10 to 8.1. I even tried to install the newest ATK for Win 8.1 and Win 10. and its still not working. the backlit still light up when i turn on my laptop. Pls help me!!!

[foxxx46]

Have you tried unistalling the driver and installing 8.1 ATK driver?