help me with choosing a motherboard

I have a Asus X53S laptop and would like to replace my motherboard. After a lot of googling, I find K53S, K53SV, K53SC and F3S. I'm really confused.
I've attached with my motherboard pictures. Hope someone can help.https://www.empowerlaptop.com/p/asus-x53s-motherboard/
https://www.empowerlaptop.com/p/asus-k53sv-motherboard/