The OBS software isn’t available – or it crashed.
The lights turned on but there is no video or a solid blue background on screen.
The lights turned on but there is only a solid white background on screen.
The lights turned on but there is only a solid white background on screen.
Solution: Remove USB flash drive.
Immediately after a complete system reboot, older Mac Minis with the OBS application may not recognize the video stream from the h.264 box the first time a drive is connected. Remove the flash drive, wait for the lights to turn off and then reconnect the drive.