I got a macbook pro from a friend and it had some water damage. When I was disabling it, a component fell off.
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I don't know what it is but all I am trying to do is get it work. Might be a stupid question but do I really need it? lol Thanks to anyone ahead of time who replies and sorry if I am posting in the wrong area.

I don't know what it is but all I am trying to do is get it work. Might be a stupid question but do I really need it? lol Thanks to anyone ahead of time who replies and sorry if I am posting in the wrong area.