I have three MacBook/MacBook Pros with keyboard problems (mine + 2 kids) and one has been repaired, only to redevelop the issue. That latter one is part of the

I have three MacBook/MacBook Pros with keyboard problems (mine + 2 kids) and one has been repaired, only to redevelop the issue. That latter one is part of the class, but I get nothing for the former two (one is which is 70% unusable). Sigh.