NVR can discover/find IP cameras,but it can not show image

No Signal or Picture when you plug to NVR.

►Check the resolution of NVR, does it support 5.0MP or above?

Some old NVRs only support 1080P input. So you need to modify the resolution of the camera through web interface of camera.

►Does your NVR support H.265 compression?

Some old NVRs only support H. 264. If camera default to H. 265,You need to modify the main stream and sub stream to H. 264 to compatiable with NVR.

►Is the IP Address of the Camera in the same Network segment of the NVR ?

You need to modify the IP Address of the Camera.