Why there is no video shown on display?
In this case , the ouput video resolution of DVR exceeds the maximum resolution supported by display:
1,you can change another display with higher resolution .
2,Login the web interface of DVR ,select a lower resolution output in system configuration.
3,Login the web interface of DVR,restore the DVR to factory setting.
(suggestion:Adjust the ouput resolution of DVR according to the display)
Sophia