Welcome to the FAQ about SteamVR!
MOST FREQUENT STEAMVR ERRORS AND ANSWERS
Error 208 - HMD display not found
This error is the result of your VR headset’s display not being detected. To fix this issue, check all connections between the headset and your PC.
Error 301 - Connection failed
Error 301 is a relatively common error for many SteamVR users, caused by an inability to start or connect to vrserver.exe. This is often caused if the executable is already running, which can be identified via Windows’ inbuilt Task Manager. If vrserver.exe is running, quit the process and attempt to run SteamVR again.
Error 302 - Init failed
This caused by issues when starting up vrserver. If this error code is encountered, try restarting your PC and reattempting to open SteamVR.