SteamVR goes black after a few seconds

I can launch any SteamVR app or SteamVR, but the display goes black within 10 seconds.

If I relaunch SteamVR, it works again without restarting anything else. SteamVR shows the display as still connected

What’s going on?

EDIT: Works now, I’m going to assume it was the built in display turning off.

Hm nope, issue is back. I can launch SteamVR titles and then within seconds the screen will go black without me moving or touching anything.

The LED turns red as well.

Hi, have you switched to Pimax-mode of Piplay and reinserted USB cable and then reboot Steam and SteamVR? Did it has any errors of SteamVR showed in your PC screen?

Unless you’ve got a way to launch SteamVR in extended mode, how else would I have Steam launched?

Sorry for my funny answer ^^.
Have you used extended cable or adapter to connect HDMI cable of Pimax, which maybe lead to insufficient electricity supply. Maybe you should try to updated video driver to latest one.