Welcome to the forum.
Can you test the used card in another system to see if it works?
Try swapping the slot positions of the used card with your video card.
From AJA KONA LHe Plus HD-SDI / Analog Video Capture KONA LHE PLUS | B&H Photo, Specifications tab:
System Requirements -- Mac or PC system with free PCI-e slot (typically 16x is required)
Supported Graphics Cards -- NVIDIA GeForce GTX285: 275.33 Graphics Driver
note: there are 20 NVIDIA Quadro video cards that are supported, most of which are FX models.
We need detailed information about ALL OF THE HARDWARE in your system.
We can best help you after you create a detailed hardware list
in the System Specs
portion of your forum profile at the bottom of the profile page or in your forum signature
. Be sure to include brand names and model numbers.
When you are done editing or creating your hardware list, save the settings.