Hi,
thanks for the advise with the jumper.
I removed it but unfortunatly it still flashes.
With your hint, I could find other threats with simmilar problems.
I even tried to plug in the cables of single modules to doublecheck, if its maybe because of the higher start up power consumption but it still flashes..
Could it be the cable from the wall wart?
It runs13,5V / 1.11A