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Can you go HDMI directly into the TV set from the H25, and send audio to the AVR? Then you'd only have to mute the TV, as you'd be turning on the AVR anyway.
If that won't fly, perhaps you can diagram the restrictions on running wires.
Can you go HDMI directly into the TV set from the H25, and send audio to the AVR? Then you'd only have to mute the TV, as you'd be turning on the AVR anyway.
If that won't fly, perhaps you can diagram the restrictions on running wires.