Originally Posted by scenemissing
So I did as you said and analog audio works normally. Audio from the second HDMI also works. It's just the main HDMI that's acting up.
I emailed Oppo via that link. I suspect a bad HDMI port at this point.
Remove any disc in the Tray.
In Setup > Device Setup > Persistent Storage do an Erase Persistent Storage.
Turn the player Off.
Pull its power plug.
While still unplugged, disconnect EVERYTHING from the player except the Main HDMI cable to your AVR.
While still unplugged, press and hold the Power button on the Front Panel for a few seconds. This is to discharge any residual power.
Turn your AVR and TV Off. Then power on just the TV. After it is fully powered up, power on the AVR too.
The goal here is to force the player to do a complete reboot of even its lowest level hardware, and to get the TV and AVR to restart their HDMI connections.
So now plug in power for the player, power it up, and check for audio on the Main HDMI output -- still with nothing else connected to the player.
If that WORKS reconnect any other connections you might have had to the player -- one at a time -- checking for proper operation of audio after each. It is possible one of the other cables or devices you had connected to the player is faulty, and is interfering with the operation of the player.
If it DOESN'T WORK, go into Setup > Video Setup and select Video Resolution CUSTOM and Custom Resolution 1080i/60. Check again for audio over the Main HDMI output. This is checking for whether your AVR has a problem with the fancy new Copy Protection involved when you try to pass 4K video through the AVR to your TV. The AVR may be failing the Copy Protection check for the audio inside the 4K video signal. (The Audio HDMI output doesn't send 4K, so it doesn't use the new Copy Protection.)