HP-67 stuck in scientific (DSP 0) mode

[Helix]

(07-17-2020 09:43 PM)Moggul Wrote:  You can get a replacement PCB from Teenix (http://www.teenix.org) that will most probably make it fully funcional again (plus some extra functionalities). It is a drop-in replacement without need for soldering. I performed the swap a couple months ago and am quite happy with the results.

I've tried this solution because I wanted internal memory instead of magnetic cards, but unfortunately my replacement board never worked correctly. To make things even worse, I think that mail from France to Australia is inexistent, so I have lost hope in a repair or a replacement.
Now I have a Panamatik new ACT, which works perfectly, and has many useful additional functions (but no card reader ability).