Yes, the little light on the left side was on. Sometimes it was out or goes flickering.
And yes, i called the German Blackmagic Support. But they could not tell me any new ideas, so i sent on monday the Multibridge back to my reseller and hope they can repair it.
But what i still could not understand why the USB (Convertermodus) works fine and the PCIe-Connection (Playback-Modus) not ?