Thank you so much Millemissen for your detailed answer.
1) Yes i was using both HDMI and SCART connections in BV7-32. I implemented an HDMI 3:1 hub so 1 HDMI was connected in the DVI-I socket with an HDMI-> DVI adaptor. Lots of cables thiugh.
2) Yes i am looking of Airplay in my link rooms INDEPENDENTLY of what is active on the main room. That was doable before.
3) I have both ATV4 and ATV3. Both are not working in this setup.
I would understand your suggestion for extractors, SCARTs etc, if i did not have sound at all in my link rooms.
This is not the case. HDMI input can be distributed through ML (not picture though) because i can hear it.
To be more accurate. I press VMEM in main room. Then BSYS3 gives image and sound to my BV and to my 5.1 speaker setup.
I go to a link room and i have 2 options. Either i press VMEM on BEO4 or the ON button of each BL Passive IR eye. WORKS
I can also change the source to DTV in my link rooms and change source hearing sound now from the terrestrial channels (BV7 in main room is stillon VMEM without problem).
The only 2 sources that i cannot hear UNLESS main room is on the same is TV(second Set Top Box) and V.AUX2 (ATV).
I also played with cabling swapping positions in the HDMI sockets and also reassigned ATV to DVD and VMEM instead of VAUX2 just in case but nothing.
It feels strange that the definite upgrade i had in sound, in connectibility and image processing with the BSYS3 cannot handle this task.
I still think this is an option/command or other minor issue (ATV configuration maybe) that i cannot figure out!
This is why i cried out here, for brainstorming by the experts :-)