“My HP Financial Calculator 12C I've had for 41 years. Still original batteries. The problem is the "enter" key isn't working consistently. I think the contact is worn or something like that. do you think it is repairable?”
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Hi James. Have you tried to reset the calculator? You might try this first: https://support.hp.com/us-en/document/bpia5202 I'm afraid that it is unlikely to find a repair shop for this product, and purchasing a new one would probably be the most cost effective choice. That being said, here is some information on folks who repair HP calculators: https://www.hpmuseum.org/repair.htm#else
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