In simple terms, "Fail 475" means SteamVR can’t establish a valid video feed to your headset. The tracking might work, the USB handshake might be fine, but the HDMI or DisplayPort signal is either missing, corrupted, or blocked.
Sometimes SteamVR fails to recognize the headset as a dedicated VR display and treats it like a standard monitor. steam vr fail 475
This Windows feature causes chaos with VR. In simple terms, "Fail 475" means SteamVR can’t