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PANAMATIK · (This post was last modified: 02-11-2015 07:33 PM by PANAMATIK.)

(05-21-2014 08:38 AM)isanchez Wrote: Hi Ignazio,

yes, it is pretty clear now. Let's see if we can find the part....difficult, but.

Again, thanks for your time and communication.

Kind regards

Ignacio

Hello Ignacio,

It is a long time since your last posting in this thread and obviously there was no easy repair possible. Could you repair your HP-25 calculator meanwhile?

As a side effect of my work of an ACT replacement, I have some spare original ACTs and some spare original ROMs. But the HP-25 has two ROM chips and one is integrated in the display driver. Unfortunately I cannot spare this chip, because I still need the display driver function. So I could help you only with an original ROM if you know that you need the second ROM.

But anyway the new ACT will likely solve your problem, because while using internal ROM code it replaces automatically the potentially defective external ROMs and RAMs.

Bernhard