(Edit: Messed up the title. Hope you get the meaning.)
I replaced my Chromecast gen 2 with a 2019 shield, and it works great except that it won't turn on my receiver. Turning the reciever off (or power-save mode to be clear) works fine, but once off the shield won't turn it on again. The Chromecast never had this issue and it's plugged in the same port. Anyone got any ideas?
Could be the wrong code. Try running the setup again and testing some more options. My Onkyo turns off and on so maybe one code is off and another is toggle?