HP-25 not working

[Peval]

Thanks Steve for the notes.

But the mistake and the consequent damage was done 40 years ago (more or less).
So, now I just want to get it back working.

If the only cause is the damage of the ACT chip, I think that the solution from panamatik (http://www.panamatik.de/html/hp_calculat...r_kit.html) repair kit should be nice.

I need to know if there is something else to check.

I'm just afraid to buy the ACT repair kit, replace the damaged one with the new and still not seeing HP-25 beck to life.

Many thanks.
Best regards
Peval