Broken HP-25

[Simon Williams]

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

Simon

[Eric Smith]

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

[Simon Williams]

Thanks. Worth repairing or just use it for spares?

[Eric Smith]

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

[Bruce Bergman]

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

thanks,
bruce

(bruceb at fatcity dot com)