Hello all,
I'm having some trouble with a rather complicated (at least for me) multirooms setup and since it involves an Onkyo TX-NR616 I'm posting my problems here in the hope that someone will be albe to shed some light on this issue.
Setup:
1 x Onkyo TX-NR616
1 x 5.1 Cambridge Audio Speakers System (3 x Min 21 + 2 x Min 11 + 1 x X300 Subwoofer)
1 x Cyp PU-O4H4C ( v1.3 HDMI 4x4 Matrix with built in HDMI over CAT6 outputs)
3 x Cyp PU-1106 RX (v1.3 HDMI over CAT5e/6 Receiver with IR Receiver)
1 x Cyp AU-11CA (HDMI Audio Embedder with built in Repeater)
3 x HDTV sets (kitchen, living room. bedroom)
1 x Bluray
1 x Freeview HD Box
1 x Mac-Mini
Aim is to watch/listen to audio/video sources independently in different rooms.
2 of 3 sources (bluray, freeview box) are connected via HDMI directly to PU-O4H4C unit.
Mac-mini goes through AU-11CA first where TOSLink and DVI are processed and output to HDMI, then sent to PU-O4H4C as well (so I can get audio/video outputs combined as my old Mac-mini doesn't provide that out of the box).
PU-O4H4C sends HDMI over CAT6 to 3 x PU-1106 RX where signal is converted back to HDMI and then sent to TV sets.
Please have a look at the picture which I hope clarify what I'm talking about.

Now, multirooms works good, AV is sent throughout the house and I can enjoy let's say internet video/audio stream in the kitchen while my wife is watchinhg TV in the bedroom.
But I have quite a serious issue in the living room where Onkyo AV, speakers system and all sources are sitting.
Every now and then, out of the blu and randomly, while I'm watching a TV program or doing something on my Mac-mini, there is a total signal loss, TV goes blank and there is no sound. While this is happening, HDMI and PCM blue lights are flashing on and off on Onkyo display.
To get AV back to work, I can either switch TV or Onkyo off and back on, or change source on PU-O4H4C let's say from Mac-mini to Freeview box and then back to Mac-mini. At this point, after a few seconds, HDMI light on Onkyo display stops flashing and audio and video are finally back.
While having this issues, same sources seems to work perfectly in other rooms.
This is driving me crazy because, even though I've updated the AV receiver to the very latest firmware, tried all different setups I can think of to identify a point of failure, changed HDMI and network cables, replaced network sockets, this problem is still happening, is random and I can't understand where it stems from.

More giving vent to my frustration here than anything else, even though I still hope I can get my head around this one day, hopefully with your help.
So, please, if you have any tips/suggestions or see what I'm doing wrong or even have words of comfort or commiseration, go ahead and let me know.
Thanks for reading this.
Edited by frea1964 - 10/19/12 at 3:48am