Roku Streaming Stick+ causes Marantz AVR not automatically turn off
My Marantz AVR normally automatically turn off after 15 mins when the music stop or there is no input. However whenever I switch to input from Roku Streaming Stick+ which connect to the AVR via HDMI port, for some reasons the Roku keeps making the AVR on even there is nothing to play. I notice there is no option to turn off the Roku stick and it might keep the AVR awake all the time.
Anyone knows solution for this would be appreciated.