Unfortunately, Microsoft surfaces are terrible for reparability. It is designed never to be opened again. they are so terribly built that if you open it and attempt a repair, you are very likely to ruin something, especially if it is the first time you have fixed something. It is not easy to disconnect the battery when you first open the surface, so just by unscrewing things, if you just tap a wrong spot, it could kill the surface. To make things worse, if opening the surface requires peeling the screen off, which can easily crack it.
If I were you, I would use it as it is, unless it is really bothering you. I hope this helps. Please let me know if it does answer any of your questions.
Falcon16