SteamVR Error 475 is a frustrating connection hurdle that typically signals a communication breakdown between your VR headset and your PC. It is most commonly associated with the Valve Index, HTC Vive, and Oculus Rift when running through the SteamVR environment.
Reproduce and note exact behavior:
If your headset isn't being recognized as a dedicated display, Error 475 may appear. In SteamVR Settings > Developer, look for Direct Mode. Steamvr Error 475
Power Cycle the Link Box: Unplug the power cable from your Link Box or Hub, wait 60 seconds, and plug it back in. SteamVR Error 475 is a frustrating connection hurdle
After trying every suggestion I could find, I finally got it working. Here’s what solved it for me, along with other common fixes. Attach these logs and details when contacting support: