Where did it come from? There are common 600 issues, due to using the wrong AV plug. I've seen this way too often on
eBay listings, comes with random cords. Sometimes not even something that fits it, obviously wrong plug shape entirely.
Are you properly using it with the USB extension?
Beyond the 600, you have s-video cables, or other workflow gear. So some troubleshooting required, to isolate the error origin.
Lack of TBC could be an issue.
However, what you're seeing here is what happens when you try to use ATI 600 USB with Win10, sometimes Win8. Are you using that OS? That card cannot be used with that OS. The OS is bad for capture, well known issue, do not blame the quality card.