So I found out that it'll cost me at least $45 if I do it in a store. I was told that this is a PCB problem so it can only be fixed by sending it back to SE, while other stores say that they can do it hands on in the shop.
Out of all the parts found here, which one would I have to purchase?
Also, I'd like to add that even if I press the key down VERY HARD, there's still no response. Plus, the key pops up when I press on the edge of the left soft key. And if I press up on the D-pad, sometimes there's no response as well. Does this mean that the key is wearing out?