I'm not familiar with that receiver. But if the GUI is same as X4000, then in Setup, go to 'Video' and then HDMI setup. Under it, make sure HDMI Control is set to 'On'.
If you don't have that option, then check the manual to see if there's similar option somewhere for HDMI.
It does appear that the GUI is similar. Under VIDEO, the HDMI Control is ON. Underneath that is PASS SOURCE (set to AUX) and POW. OFF CONTROL (set to ALL). Still no worky.
HDMI AUDIO OUT: AVR
HDMI PassThrough: ON
HDMI Control is ON
- PASS SOURCE: AUX
- POW. OFF CONTROL: ALL