In my case, if I set HDMI CEC off on Zidoo, it will prevent the soundbar to come out from standby when TV is powering up. Also, it will disable controlling the ATV 4K with TV's remote. Even with HDMI CEC on for Zidoo, the soundbar will not resume from standby if Z10 is powered off completely. Very very strange issues, I have tried different scenarios and different hdmi cables so far. Only ATV 4k is bulletproof with hdmi cec settings, I can actually start it up only selecting it from input source from TV remote while Z10 will not appear only after starting it up. After starting it up I have to shut down it normally and start it again in order to have image on TV. It's driving me crazy and lately I start watching movies with infuse from atv 4k despite its lack of support for dolby atmos and dts x for offline sources.