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Jurgen Keller · (This post was last modified: 01-13-2017 07:16 PM by Jurgen Keller.)

(01-12-2017 10:22 PM)Hans-Peter Wrote: 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?

I have to admit that I have no good advice in this case. Maybe a bad display driver or a bad capacitor? The only thing I can offer is to check if I have a spare (and working) CPU board so we probably can track down the problem.

Maybe you should also consider to post your question in the General Forum to make it more visible.