11-14-2019, 02:40 PM
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.
[attachment=7812] [attachment=7813] [attachment=7814] [attachment=7815]
Is the calculator resurrectable or should I go the Panamatik route?
Thanks!!!
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.
[attachment=7812] [attachment=7813] [attachment=7814] [attachment=7815]
Is the calculator resurrectable or should I go the Panamatik route?
Thanks!!!