HP97 memory fault?

[Hans-Peter]

Thanks for your sympathy.

Now I have tested all normal operations and all registers many times.
In the run mode, the calc works perfect.

The measurements of voltages is my next step.
The change of the ACT is perhaps a deal for next year at the Allschwil Meeting with Matthias. Then I would prepare a socket for the "new" ACT.

Hans-Peter