![]() ![]() If that doesn't solve the problem, then a repair might be possible, although you have to weigh up the costs against just buying a new one, as this model is still currently available. If you have a Hewlett-Packard HP 12C that is no longer working, you can first try replacing the 3x1.5V cell batteries. For keypad test, use divide key instead of X key, and then press each key in turn (will show "Error 9" if out of sequence). ![]() Display will show "running" for about 20 seconds, and if tests pass, all display elements will be on. Turn calculator off, press and hold X (multiply) key and then press ON key, then release X key. Be sure to back up any important information held in the calculator before running these tests. Note that diagnostic tests generally delete any data on the calculator. If this doesn't work, you can also try this alternative download link. This is not a problem of the calculator, it is a financial problem and requires. You can download the Hewlett-Packard HP 12C manual from the manuals website. HP Community - HP 12c Platinum rounding error in computing n on a. Several versions have been produced including Platinum and Platinum 25th Anniversary Edition - still available.Ī sample of this calculator is held in the collection. The classic financial calculator from HP. The calculator was manufactured in Malaysia. It has 84 functions, 39 keys, and an LCD (liquid crystal) display. The Hewlett-Packard HP 12C is a finance calculator with 10 digits precision and RPN (reverse polish notation) logic. The calculator home page Home Download FAQ Online Calc Articles Database Resources About ☰ Hewlett-Packard HP 12C (Voyager 1.0) Hugh Pickens writes 'The Wall Street Journal reports that Hewlett Packards HP-12C financial calculator has remained outwardly unchanged since its introduction in 1981.
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