Integra DTR-60.5 main zone sound lacks on zone 2/3 power on/off
I set-up an out-of-box Integra DTR-60.5 and faced strange issue.
I have three zones: main (TV), zone 2 (another room - speakers), zone 3 (another room - speakers). If the main zone is on (no matter what source - tuner, BD, AppleTV) and I turn the additional zones on or off the main zone mutes (no sound at all) for couple of seconds and then recovers to normal.
I have a neigbor with three years old Integra DTR-70.3 and also two additional zones with speakers only. And there is no sound lacks like mine does.
Please advice - what could it be??