No backlight in my ROG GL702?

[QARTS]

Hello everyone,
I bought a ROG GL702VM off ebay and although its working fine but my only concern is its backlight is not working
On pressing Fn+F4 on screen it displays backlight is up but it doesnt actually lit.
I have downloaded latest ATK packagd and installed still the same.
Any other possible way to get it working again?
Thanks and regards everyone.

PS-The Power key does have an Red LED which lights up.

 

[StefanM]

I have the little brother GL502VMK

Run setup again, it offers a repair option

 

[QARTS]

I have the little brother GL502VMK

Run setup again, it offers a repair option

Okay i will try it once again.
Well what do you think its hardware or software related issue?
PS-Flight mode key also lights up on pressing Fn+F2!

 

[StefanM]

Now i vaguely remember to have had that issue once.
A simple reboot did not help, i had to power off and on again.

If that does not fix it, reset the embedded controller.
Asus calls it "hard reset"

 

[QARTS]

Now i vaguely remember to have had that issue once.
A simple reboot did not help, i had to power off and on again.

If that does not fix it, reset the embedded controller.
Asus calls it "hard reset"

Thank you for your reply but can you please tell me that will doing hard reset erase my data as well?

 

[StefanM]

Try power off/on first. I'm confident it will help.

The "hard reset" described at https://www.asus.com/support/FAQ/1032747 only erases data used by the embedded controller.
Actually i just tried it. Since nothing was wrong on my rig, the content looks like before.