Maintenance of property inspection monitoring line

First, you have to confirm where the camera is.

There is no video signal, which means that the video recorder has not received the signal. Can be investigated in detail.

1. Test the front end to see if there is a signal from the front camera. If not, change the power supply, which is easy to break down. If there is no image after changing the power supply, ask the monitoring after-sales personnel.

2. If there is a signal at the front end, go to the terminal and switch this port to another road to see if there is a signal. If so, the port of the hard disk video recorder is broken. Change the vcr. If there is no image on the camera, it depends on the line.

You'd better find a professional to show you. If in doubt, please write privately.

I hope I can help you.