Hi
thank you for your reply
The reason i need to turn off the CCU is because the leds are annoying and very bright during night, and also because it's plugged into an HDMI switch who will not turn off if there are some port powered.
Also, i don't know if CCU will solve the problem but plain Chromecast start having some issue (for instance endless buffering and stopping playing video on videostream) if it's turned on all day long forcing me to turn off, let him cool for few minutes, and then turn on again
And i did'nt mention that having electronics turned on 24/7 is something you really should'nt do for ecological reason (and yet i have something i can't turn off for obvious reason like router and telephone)
The Chromecast ultra uses a trivial amount of electricity, I wouldn't worry about that.
As for that one little LED, if it's bugging you a small piece of electrical tape will solve that in a flash (pun intended).