In general, issues related to 'loss of video' on CCTV cameras or the DVR/NVR are caused by a variety of issues: failed power supply, faults with wiring, network unstable, hardware failures such as cameras, monitors or NVR/DVR, failed camera software and conflicts with the IP. So, what causes video loss in security cameras?
Your security cameras (IP cameras or analogue cameras) suddenly stop operating, a video loss message appears on the monitor or TV screen, or your cameras' pictures are completely blacked-out out of nowhere. Video loss is the most prevalent CCTV security system problem.