I've been a heavy user of my 42S for over 20 years now. To my dismay, I'm starting to see a chronic problem. Most of the time, I lose a row or column of keys.
I'll lose the 123 row or the 963 column.
The calculator has always been either in the old leather case HP used to sell or in use, so it's clean. Is there a way to fix this without having to crack open the case? I've already sprayed contact cleaner in the case and that had no effect other than to make the calculator greasy for a day or so.
I sure am jonesing for RPN. I'm tired of getting a result of zero.
HP 42S - intermittent rows nonfunctional
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