The Museum of HP Calculators

HP Forum Archive 19

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HP-25C ACT Chip?
Message #1 Posted by Mark Henderson on 8 Nov 2010, 5:33 p.m.

I have a very clean HP-25C that I'd like to add to my collection, but it is displaying "all 00000000000" which from what I read here is an ACT chip problem. I understand I can switch this with an ACT from another non-27 member of the Woodstock family. Does anyone have a working ACT chip I could buy or trade for? I have a fair selection of HP LED calcs to pick/plunder from. I'd really like to get this little guy back to working condition!


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