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HP-21 malfunction
11-14-2019, 02:40 PM (This post was last modified: 11-14-2019 02:41 PM by Moggul.)
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Moggul Offline
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Joined: Jun 2019
HP-21 malfunction
I recently acquired an HP-21 and am trying to resurrect it.

The battery pack was in very bad shape so when connected to the charger the display was erratic, showing a flickering 0 in the rightmost digit. After installing fresh rechargeable batteries the display showed a single strong 0, and now it shows all 0s without any flickering (see pic sequence). This is both when connected to the charger and when powered by the batteries alone.

               

Is the calculator resurrectable or should I go the Panamatik route?

Thanks!!!

11C 12C 15C 17BII 18C 19BII 21 25 27S 28S 32E 32S 32SII 33C 33S 34S 35S 38C 39gs 39GII 40gs 41C 41CV 41CX 42S 45 48G+ 48GII 49G 49G+ 50 67 71B 97
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Messages In This Thread
HP-21 malfunction - Moggul - 11-14-2019 02:40 PM
RE: HP-21 malfunction - Harald - 11-14-2019, 03:10 PM
RE: HP-21 malfunction - Steve Simpkin - 11-14-2019, 03:49 PM
RE: HP-21 malfunction - ignazio - 11-15-2019, 12:09 PM



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