Comment by nfriedly

My TV and soundbar have the same issue: CEC works for everything except the "turn on" command. I ended up fixing it with an arduino-ish IR blaster that's powered by the TVs USB port - so as soon as the TV powers on, the Arduino boots up and tells the soundbar to turn on too. https://www.nfriedly.com/techblog/2015/01/samsung-tv-turn-on...

I also had a NUC that I installed a Pulse Eight CEC module into, but I never ended up using it, so it got passed on to someone else.