How can I test a calculator ?


I know that pressing and holding [ON] and pressing and releasing [/], and then releasing [ON], the keyboard test is started in the HP-15C. With [ON] and [x] is possible to test the calculator and display functionality.

Similar and more complete tests exist in the HP-48SX.

It could be usefull to me and to all the HP collectors to know how to perform these test in all the other HP models, to test a calculator before pay for it. Could anybody help me ?

Thanks. (I think it is a good info for the Collectors Corner of the HPMuseum)


pag.273 Owners MAnual HP-71

Type PI [ENTER]. If display is 3.14159265359 then more 60% circuits are ok.

Press [ON] and [/] simultasneously, then press [ENTER] to execute level 1 initialitation. The display should now display Replace cursor (basic mode) or Insert cursor (calc mode).

Press [ON] and [/] simultasneously, then 2 and press [ENTER] to execute level 2 initialitation (INIT: 2); Hp-71 will do self test of circuits. The display ROM TEST 1 as it begins to test, and display ROM TEST 1G 2, ROM TEST 1G 2G, ROM TEST 1G 2G, 3 ROM TEST 1G 2G 3G 4 ROM TEST 1G 2G 3G 4G If all is ok all number continue with the letter are G; if faulty circuits are detected some letter are B (service are required).


You have a point here Guillermo. Did you contact the MoHPC about this?

Instead of exchanging the self test methods of different HP calculators here it would be better to store all these methods in one place. Realising the MoHPC webmaster can't be expected to know them all, the gaps could be filled in by us, the users and collectors.


For some bizarre reason, I've been collecting self-test information on various calculators, including HPs. Here is what I currently know about HPs:

HP Pioneer series:

display test: C and top_row_5th_key; end with C and top_row_3rd_key

keyboard test: C and top_row_4th_key


display test: ON and E; end with ON and C

keyboard test: ON and D, then E


display test: ON and left_arrow; end with ON and up_arrow

keyboard test: ON and down_arrow


internal test: ON and divide, then 2, then END_LINE



Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-42S ESD self-test Yriarte 2 1,078 10-24-2013, 09:08 AM
Last Post: Yriarte
  So I took a test with my Prime today ... kris223 12 2,424 09-25-2013, 07:19 PM
Last Post: kris223
  A brand new calculator benchmark: "middle square method seed test" Pier Aiello 25 4,994 09-13-2013, 01:58 PM
Last Post: Pier Aiello
  Concern about Voyager keyboard test Matt Agajanian 2 1,060 08-30-2013, 07:56 PM
Last Post: Matt Agajanian
  Voyager Self Test Mike (Stgt) 5 1,451 05-16-2013, 03:28 PM
Last Post: Mike (Stgt)
  Physics Test Howard Owen 37 6,065 01-24-2013, 03:33 AM
Last Post: Csaba Tizedes (Hungary)
  Help test an iOS calculator Tod 36 6,666 06-10-2012, 08:14 PM
Last Post: Tod
  The Timex(R) Test Matt Agajanian 7 1,605 03-25-2012, 09:01 AM
Last Post: Crawl
  HP12c Anniversary Seft Test Nick Mihiylov 2 931 01-04-2012, 07:23 AM
Last Post: Koralatov
  HP 12cP25thAE Self-Test Result? Kerem Kapkin (Silicon Valley, CA) 5 1,286 10-04-2011, 05:37 PM
Last Post: Katie Wasserman

Forum Jump: