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+--- Thread: HP25, dead or alive? (/thread-7608.html)
HP25, dead or alive? - Flayerty - 01-16-2017 06:48 PM
Hello everyone, I know that it is a very general post, i'm sorry, but at least I will try to understand more about the HP25 calculator that was given to me by a friend of mine. So: when is ON and RUN, 0. appears on the right side of the display and pressing any button nothing happens. On PRGM it's 0, that's all.
Where should I start? Thank you all for your patience, and any replies.
Emanuele
RE: HP25, dead or alive? - Dirk.nl - 01-17-2017 08:40 AM
Nice calculator!!
Maybe better to ask this on:
"HP Forums / HP calculators (and very old HP computers) / General Forum"
Success!
RE: HP25, dead or alive? - PANAMATIK - 01-17-2017 09:46 AM
(01-16-2017 06:48 PM)Flayerty Wrote: Where should I start? Thank you all for your patience, and any replies.
This indicates most likely a defective ACT (Arithmetic Control Timing) chip. It can be repaired. See: this thread.
Bernhard
RE: HP25, dead or alive? - Flayerty - 01-17-2017 10:21 AM
(01-17-2017 08:40 AM)Dirk.nl Wrote: Nice calculator!!
Maybe better to ask this on:
"HP Forums / HP calculators (and very old HP computers) / General Forum"
Success!
Thanks!
RE: HP25, dead or alive? - Flayerty - 01-17-2017 10:21 AM
(01-17-2017 09:46 AM)PANAMATIK Wrote:(01-16-2017 06:48 PM)Flayerty Wrote: Where should I start? Thank you all for your patience, and any replies.
This indicates most likely a defective ACT (Arithmetic Control Timing) chip. It can be repaired. See: this thread.
Bernhard
Thanks Bernard!