During a game the other day, I noticed that my shift key wasn't always responding when I pressed it (which is never the way you want to find out haha). Upon closer inspection I realized that the left half of the key still works, but the right side is slightly sunken in and not as responsive.

I'm just wondering if anyone here can tell me exactly what's wrong so I can move towards solution. From what I have looked up, I might have to replace the key or key board. I can replace single keys right? I haven't seen any videos of this particular model having keys replaced, but Ive seen others where they just pop em out. The Laptop is about 5 years old now, but aside from this one key, working just fine. It's a G75VW 1A model to specify.

Any pointers will be appreciated!