[Alexander Trust]

Do you think it would help if I put some, let’s say small piece of folded paper between two of those cables? We have a tb display in use as well connected via tb. So on the iMac both tb slots are used.

And fortunately I made another discovery. As I rebooted the iMac again, after rebooting the imagery was gone again. I thought – okay… why is that. Did not touch the iMac. The console was up an running all the time during reboot and so on. So I unplugged the intensity, turned the console off, rebooted again. First I plugged in the intensity, then I started up the console, et voilà we had a signal. Today apple released an EFI fw update für iMacs, something with HDCP was mentioned as well. Maybe this had something to do with recognition as well, though I don’t think it should have been, because at least the PS3 is connected via analog component cable.

Thanks for your help – and this forum is also a great resource for research on different topics.

[Alexander Trust]

I have to apology but you were right in first place.

Well the cable was plugged in the right direction but as you mentioned it does not always suit for 100%. I unplugged the cable, plugged it in again. And I dangled the cable a bit, suddenly it worked…. then I captured some seconds. Everything went fine. I wanted to rearrange the iMac back to the place it stood before on the desk. You know, we know, everybody know the slots are on the back… #sigh In the end the signal got lost again. I tried it again and again no lucky me. I did not manage to get the signal back again. 🙁

Silly that such an expensive thing like an iMac ’27 does show a behaviour like this. Would you propose I should cut some of the plastik on one end of the tb cable? So it would better fit in the slot? I know it costs 49 bucks but when this will prevent it from not showing the signal… I would do it. I have managed to do this with other cables for video or audio before.

[Alexander Trust]

Well I once had that when I first installed the TB Display. But I can say for sure, that the tb cable is plugged in correct and of course the iMacs system “sound” settings for example show a blackmagic as a audio device. But It does not deliver any sound either, like with the video signal – nothing. 🙁

Thanks for your clue though.