Hi Mike,
Could you test it in ASIStudio-ASICAP on Windows PC?
Please connect the camera directly to the PC, do not use any hub, and test it with different cables, ports, computers, and 12V power supplies.
https://astronomy-imaging-camera.com/software-drivers
Please set short exposures such as 10ms in video mode or preview mode, and check the fps, if fps continues to show 0 and the camera does not display an image, the camera needs to be sent back for repair, and take a screenshot of ASICAP software to show us the fps.