HDMI ARC on WiiM Ultra causing analog outputs to stay “active” (Hypex FA252 never enters auto-sleep)

[thematttk]

Got it. But keep in mind, Art mode is not actually powering down the TV.
I know that this will not align with your intended use-case, but try completely powering down and unplugging the TV instead of just using the Standby/Art mode... we want to see if that kills what we think is residual activity on the analog outputs.

 

[Murkas]

Tested now, and zero difference when powering down TV to ”black” stand by vs art mode.
When disconnecting TV completely from power source the problem goes away.

 

[GD Fan]

I have a substantially similar problem with my Samsung TV (two of them in a row, actually) interfering with the Denon 3700 when the Denon is streaming (Tidal) and the TV is turned off. Or when it's on for that matter. The TV eArc connection somehow disrupts or confuses the Denon and the streaming cuts out repeatedly. Only way to alleviate it is to unplug the HDMI cord between the two.