How do I set an HDMI output as audio only?

[RobertJorstad]

The issue:When I connect my Sony AV Reciever DA2400ES using the BD port to my PC via an HDMI cord, I get a display that I don't have a monitor for called SONY AVAMP. Windows will open some applications to this display, even though I have one of my other displays set as default. Idealy, I'd be running a 5.1 surround system with just one HDMI cable going to the reciever, and an audio output option that doesn't produce a display I am unable to see.I have two devices:1) Microsoft Surface 7When I connect a USB-C to HDMI adapter to the reciever, I only get an audio output labeled SONY AVAMP (Intel(R

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