Broken HP-25


Does anyone have any ideas on this:

I've bought a an HP-25 which seemed OK apart from a few iffy keys. However, programming doesn't seem to work, neither do registers or stats. Is this a memory problem? When programming, all steps appear to show GTO 00. Calculating mean in stats shows an error?

Many thanks



Yes, those are the typical symptoms of the RAM chip(s) completely failing. :-(


Thanks. Worth repairing or just use it for spares?


The only source of the RAM chips is from another HP calculator, so I'd say keep it for spares.


Simon, contact me offline if you are in need of HP-25 parts.


(bruceb at fatcity dot com)

Possibly Related Threads...
Thread Author Replies Views Last Post
  Broken keys on HP Prime? Tarcisi C 0 427 12-10-2013, 05:59 PM
Last Post: Tarcisi C
  Strange HP 25 Problem (Repair) Onur Ilkorur 5 918 12-06-2013, 05:13 PM
Last Post: Onur Ilkorur
  HP-25 Wayne Selway 1 405 11-22-2013, 12:58 PM
Last Post: Michael de Estrada
  Interesting Base Conversions - Porting a 1975 HP 25 Program to the HP 35S Eddie W. Shore 1 440 10-13-2013, 07:49 PM
Last Post: BruceH
  Is my HP Prime broken ? Michael de Estrada 10 1,017 10-13-2013, 11:16 AM
Last Post: Mike Powell
  Broken HP-97 to spare? davorin 3 539 08-29-2013, 01:08 AM
Last Post: davorin
  HP-25/25C Potential Matt Agajanian 14 1,512 07-17-2013, 02:57 AM
Last Post: Matt Agajanian
  Recharging original batteries in HP 45, 65 and 25 Michae Altmann 1 405 03-05-2013, 12:21 AM
Last Post: DavidShenk
  HP-25 keyboard Brad Barton 5 599 02-16-2013, 09:59 PM
Last Post: Brad Barton
  HP 65/25 shout-out in interview with Paul Lutus Egan Ford 3 470 12-21-2012, 11:09 PM
Last Post: Mike Morrow

Forum Jump: