6 Ways to Improve School Security and Safety
6 Ways to Improve School Security and Safety School security is top-of-mind for school administrators nationwide, and today’s schools face many challenges when it comes ...…
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Firstly, detect whether the interface of video card or hard disk recorder is loose and the power supply is normal. If everything is normal, it is necessary to detect the power supply of the camera and the camera.
No video surveillance cameras, camera power supply first check whether there is a problem, use a multimeter to detect the output voltage of 12V is normal, if normal, to continue the investigation of other fault points, if not normal, replace the 12V power to do detection.