The camera flashes because the signal is interfered by other lines and the video line interface is in poor contact.

There is something wrong with the camera coding or the power supply is insufficient. Please pay attention to check the coding and power supply when the camera flashes. The position of the camera is dark, and the light sense is continuously switched. The choice of position will also affect the camera. Interface connection of hard disk video recorder. Pay attention to check the interface connection to ensure the correct connection.