Is there a way to get the backlight to work on my asus g73jh? and will it crash my laptop

Ok so I have an asus g73jh and i'm looking to upgrade it. These are the 3 big ones I want to do (and some minor extras that I don't see as needed)Big stuffI'm looking to upgrade the cpu because the i7 720Q that i have in it is beginning to slow the p...