Right - this sounds exactly the issue I have with <standby> which I emailed Zidoo about before the Spring Festival. If I send a <standby> command by 232, the box shuts down, presumably to standby - red light, no front display If I then send <powerOn> by 232, the red light goes out, the front display comes on - the box appears to power up, but NO picture. Also, when I do this the 1080p light on the front is displayed where previously it was 4K (I have gui res at 4K23). So at the moment, standby does not seem to work (I also confirmed this in a reversion to v1.7.8). (I get the same behaviour when sending power commands via IR and have the on/off set to standby by default.) So as I said in the last post - set the on/off behaviour to default to OFF by long pressing the power button when the device is on and choosing OFF as the default. I know you said the Soundbar does not come back up if the Zidoo is off - not sure why that would be, but there must be a way around that. So in summary, your issue seems to be that standby mode in the Zidoo is currently broken.