I have an Evtevision ES-N196 16ch 5MP NVR. It was working fine until I bought two new cameras to hook up.
I added 2 SV3C. One was a D13POE-5MPL-A and the other was a SV-B06POE-4MP-A. I couldn't get these too display. As the NVR is older then the two cameras I figured a firmware update might be...