Applies to: N43SU/N44SU
If you find all the cameras‘ image disappears on TV frequently, please try methods below.
1. Please unplug your NVR from the power source and plug it into power source again to reboot the system.
This method is effective to solve image disappearance problem.
2. Please disconnect NVR from router to see if the problem can be solved.
3. When the camera‘s image is not shown on TV, please go to setting to see if NVR can detect the camera‘s IP. If yes, you add a camera to NVR manually to show the image.
Here is instruction.
https://help.annke.com/hc/en-us/articles/360000252861-How-to-add-camera-to-NVR-manually-
4. Please go to Main menu--advanced--restore to select all to restore the system to have a try.