If you need to restart the link box, follow these steps.
Close all Steam apps on your computer, including the SteamVR app.
- Unplug the power and USB cables from the PC side (without the orange trims) of the link box.
Wait for a few seconds, and then plug the power and USB cables back in.
On your computer, you might see a notification that drivers are being installed. Wait for the installation to finish.
- To verify that Vive hardware are detected, restart SteamVR on your computer.