@neonox
@NotFuzzyWarm

Thanks guys for all the help provided.

I do not see the problem solved, but I definitly try the operation recommended by NotFuzzyWarm.
Will be at the miner#s place only by tuesday next week and will keep you informed.

But for general knowledge only:
How would one flash a new image with a ssh session ?

There should be a possibility, since the webinterface probably will only start the command line programs.
Correct ?

Did one try this ?