Hi,
I have submitted my problem to my dealer and to Nikon Service.
To Nikon Service, especially to see if they had any tips ...
Both my dealer and Nikon service reacted very quickly and to the point.
Nikon want to have my camera for measurement on a test bench and possibly service.
However, about in a bit more than 4 weeks I have a holiday in our planning.
During contact with Nikon, we came to the conclusion, that the measurement before that holiday might be possible.
But, if parts need to be replaced, this can be a time problem.
And since my camera operating perfectly (only higher power consumption), we decided to send my D850 through the dealer to Nikon Service after my holidays.
The approach of my problem by both my dealer and Nikon Europe Service gives me a good feeling.
To be continued.