Ok then,
headboard and ribbon cable came in and are now installed.
Printed fine for a moment and lost all power!
Switching back on panel flashed once, that´s all.
Will not power up.
Wiggled the power cord, helped once or twice.
Powers up occasionally.
Seems that the problem is in the power inlet.
Hope so!
Part of the problem really is the power inlet, but still (or again) the other head isn´t working properly.
In the nozzle test it prints only a few hardly noticeable lines from the 1. head.
Here´s a pic.
Any thoughts??