I've just installed a theatre with 4 18's and everything is working perfectly all over the house (a9, a6, Beovision 14 with 8002's, beolab 2 and 17's. I have a singular issue in that after about 40 minutes the beovision goes into standby for no apparent reason - one minute playing, next minute asleep.  (Didn't do this with the previous Avant). Only does this after joining audio experience from any other device. Its all hard wired so not wireless issues. Anyone have any ideas? Thanks