I don't have a solution. My devices are a Samsung Q70R TV and a Yamaha RX-V685 that were purchased in February 2020. They are connected to one another via an HDMI cable at the HDMI-ARC ports. HDMI-CEC is enabled on both. The issue is that the TV remote will not power on the receiver. It will, however, power off the receiver, and it will control the receiver volume once the receiver has been powered on. There is a setting within the TV "sound" menu that desigantes where the TV sound will be output. When "receiver " is selected, the TV will power on the receiver at that point, so I know that the capability is there. I've contacted both Samsung and Yamaha and gotten unsatisfactory answers from both. I realize that my case is not unique, but thought it best to add my narrative to the collection. Hopefully, someone in a position to do something is paying attention.
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