How to Fix No Audio on TV on a Steam Deck With Windows
If you run Windows on your Steam Deck and experience audio issues when hooking it to a TV, you’ve come to the right place. Our troubleshooting guide features nine potential solutions, one of which should solve your audio issues when connecting Steam Deck with Windows to a TV.
Panel Under Related Settings Marcus Mears Windows Running Steam Deck Device Manager High Definition Audio Controller Steam Deck
Source: howtogeek.com