AVS Forum Addicted Member
Join Date: Jun 2001
Location: NW Houston, TX
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Oh, ok, now these are some really important details you didn't mention.
If you've got two displays hooked to the AVR's dual-HDMI-output, this will explain a lot of the difficulty. Those outputs are really not intended to be used in different rooms (from a functional standpoint). Lack of sound is very likely due to the difference in codec support in your display, being ignored as the sound is being (assumed) handled by the receiver and the attached speakers. Trying to use that display in another room kinda ruins that assumption.
And not surprising at all that swapping extenders around will give different results. Different chipsets, implementations, idiosyncrasies, etc.