SOURCE: TI-35 Plus
Make sure the battery contacts are clean. I just fixed mine, as it had been sitting for some years and the batteries went bad.
I gently cleaned any "green mold" from the contacts with a light Scotch-Brite pad and some electrical contact spray that I got at a local hardware store.
I tested the batteries with my digital meter to make sure they were 1.5V or more and put everything back together. Works great!
Give it a whirl---this is a nice little calculator. I bought mine in 1990-1991 and it's gotten me through undergraduate and graduate school...
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