Hi, Alexandre; tudo certo? (alles gut?)
I had some experiences when removing Voyagers main(key)board and placing them back that lead me to post an answer. It was really hard to settle the main(key)board back as it was, I mean, with all plastic rivets holding the board in the original, factory place. I have both an HP12C and an HP15C with this problem: the keys slightly move side-to-side. The best I could do was to firmly press the main(key)board while melting some plastic rivets back and making sure only to release the board after they were all back to the current temperature. As for keeping them in place, I usually finish the job with four to six small hard-rubber tabs, cut as small and thick enough to be between the main(key)board and the half back case when the calculator is closed. These tabs sould not be too thick so they'd bent the back case, neither too thin they'd make no difference.
If you want to give it a try, go ahead. Although I have made it sometimes (at least four times), I did not take physical measurements, so I cannot tell you for sure how thick these tabs should be... Sorry! Must go for some expreiments, though.
Best regards and good luck (boa sorte!)
Cheers
Luiz (BraSil)
Edited: 28 Apr 2006, 12:17 a.m.