this post was submitted on 22 Jun 2023
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My 30+ year-old Casio fx-7700G is the oldest calculator in my collection. It's a little worn, but still works and gets used! It's been a wonderful companion over the years.

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It is a beauty, but it's sure seen better days. It kept displaying Low Voltage, even with fresh batteries. I cracked the case in a few places taking it apart to fix it. I have no idea what I did, other than touch a multimeter to a few spots on the board, but it works fine now. Dumb luck, I guess.