Hacking Bought a used DS Lite - loose Y button?

[Exhumed]

I recently bought a used DS Lite on Ebay that arrived in good condition but has a very loose Y button. Where all of the other buttons have a clear "oomph" when pressing them, the Y button is very loose and kinda sits down without pressing it. It's more of a "touch" button than a press button, and it's very annoying.

What would the issue be here and could I fix it? Any ideas?

Thanks...

 

[gameboymortal]

sounds like damage to this component