If it is easy to swap, I would try give it a try.
I bought a new-to-me E6430 -i7, which I really like, after my old E6430 -i5 got a terminal mobo short. Unfortunately, it has an unlighted keyboard, and I was wondering if I could swap my lighted keyboard from my old machine for the unlit one in my new machine - and have it light up? The bios on my new E6430 -i7 doesn't currently have the keyboard lighting settings like my old machine did, but, ... perhaps if I swapped out the keyboard, the bios would pick it up as a hardware change and add the setting in? Or would I have to just hardwire the keyboard backlight to the 5v. bus somewhere and settle for always on? Comments from anyone who knows anything about such matters would be much appreciated!  
Can I use a lighted keyboard from an old E6430 in my new (old) E6430 which 
doesn't have it