hp-21 key malfunction


The battery pack leaked in my hp-21.I've clean the calculator put new batteries in.The calculator works well
when I test it outside the beige casing, but when I put all
the thing together the blue, rcl and clx key don't work.
(The battery pack fit real tight in the casing. It seems wider a bit because i've pry the old batteries out.)
Hope someone has a clue on this.
Thank you
Marc Pépin


Hi Marc,
try a cleaning with printed board solder flux cleaner like
Electrolube "Flux Clean" or contact cleaner like Chemitronics "Pow-R-Wash" without warranty.
Fortunatly, if it's ok afeter cleaning, protect the contacts with Electrolube "contact Grease" and remove all Nicad battery when calculator is not used

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-97 Printer Malfunction Dan Lewis 17 3,946 11-25-2013, 10:18 AM
Last Post: Thomas Chrapkiewicz
  HP Prime - EEX/X/Toolbox-key suggestions bluesun08 2 1,182 11-07-2013, 06:15 PM
Last Post: bluesun08
  HP PRIME : strange behavior when trying user key capability Damien 12 3,002 11-03-2013, 11:02 AM
Last Post: Joe Horn
  HP PRIME: How to use [a b/c] key from a program Joseph Ec 4 1,505 10-29-2013, 06:18 PM
Last Post: Joseph Ec
  Roll-down key in HP-15C Steve Ross 6 1,776 10-15-2013, 04:12 AM
Last Post: Nick_S
  HP 21 - How to troubleshoot? Adam Vaughn 13 2,695 10-02-2013, 09:40 AM
Last Post: Adam Vaughn
  HP-15 LE Key repair question Namir 2 1,153 06-10-2013, 10:42 PM
Last Post: Namir
  magnetic strip malfunction aurelio 7 1,940 01-14-2013, 12:25 AM
Last Post: aurelio
  HP calculators: origin of prefix key labels f and g M Habl 9 2,198 11-21-2012, 08:29 PM
Last Post: Gerson W. Barbosa
  HP Key Notes Programmes? Michael Lopez 0 767 07-02-2012, 09:26 AM
Last Post: Michael Lopez

Forum Jump: