After less than half an hour, the display at the bottom again sparked off completely, so that a 1mm gap between large central frame and display opened up.
That is then probably, the whole thing again, in the hope that the new display is not damaged in the action. Really great ...
Get it now trying to tape from 3M, because that does no good here, sorry. As well as the very good pair of tweezers and scissors useful does not help!