The joy of helping others

[Hans-Peter]

Hallo Jürgen

After my easy repair of a HP97 with somme faults (resistors, transistor, printer roller and card reader), I have my HP65 own defective candidate. At power-up only a short flickering of one digit. The current consumtion looks quite normal.
No corrosion, clean contacts, no visible damage an no idea what's going wrong.
I tried using the schematic to make voltage measurements, but I did not get any further.

Is there any help in universe?

Schöne Grüsse aus Basel
Hans-Peter