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Unresponsive keys on HP12C

The 0 (zero) key on my HP12C is "loose" and unresponsive and has to be pressed very hard to register. Can it be fixed?

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 102366 Answers

SOURCE: I have an HP 19B II from college and it's worked

http://www.fixthatcalc.com

Posted on Nov 10, 2010

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SOURCE: Sticking/Under responsive zero key on an HP12c!! Is it trash?

It could be some dirt or grit in the keyboard, which a blast or two of compressed air might clear out. It could be a worn dome on the inside of the keyboard.
If you want to have it repaired, there's FixThatCalc, though they're currently not taking new orders. There also have been several threads on opening and cleaning Voyager series keyboards at the Museum of HP Calculators. Here's one article on opening a Voyager.

Posted on Apr 19, 2012

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Hold the Find button on the base unit until you get a double beep then
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Then register the handset to the base as follows:
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Note:
If you have more than one handset then repeat registering the handset to the base for each subsequent handset/phone.


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fault and if it is less than a year since purchase the retailer should
change it for you.

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