crwdns2934241:0crwdne2934241:0 kubagurPL

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Original TI-89 enter key not working

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I have an original TI-89 which is kind of corroded on the inside. The enter key worked just fine a little while ago, but after taking it apart and carefully back together, all the other buttons work, just not the enter key. Any ideas on repair? Should I just get another one?

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TI-89 Titanium

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open