ORIA Systems have heard many users complaining about video loss problems on various CCTV brands due to poor installation and commissioning practices.
In general, the issue of “video loss” on CCTV security cameras or DVR/NVR, in many cases, comes down to several factors: poor design, insufficient power supply, unstable network, wiring problems, hardware (cameras, NVR/DVR or monitor) failures, outdated firmware and IP address conflicts.
Reason 1 – Insufficient Power Supply
The insufficient power supply is, very often, the culprit of the video loss on one or all security cameras, CCTV video loss at night, video signal loss on screen, camera going black at night, or camera video flickering on and off.
Here are some common reasons for insufficient power supply to CCTV cameras:
• Loose cable connection
• PoE switch or PoE injector
• Cable is too long, or one cable is supplying too many cameras at once
• Faulty power cables (old, damaged, degraded or cut)
Loose cable connection, for example, between DVR/NVR with cameras, between CCTV cameras and monitor or screen, power adapter, or any possible loose connection in camera power supply could cause video loss.
Reason 2 – Power Spike & Interference
Power spike is likely to cause sudden video loss on security cameras, all CCTV cameras black screen, a camera with the electrified surface, the camera with a vertical/horizontal line, or serious damage to the camera circuit board or other components.
Here are some common reasons for power spike & interference:
• Mounting security camera to a metal/conductive surface
• Lightning strikes
• Strong electrical currents interference from nearby electrical equipment
Reason 3 – Weak Wi-Fi Connection or Low Bandwidth
Video loss or weak video signal among Wi-Fi CCTV cameras and systems could be caused by unstable network connections, weak Wi-Fi connection, low internet bandwidth or poor physical layout of Wi-Fi repeaters.
Here are common reasons for network-induced video loss:
• Long distances between wireless security cameras and site routers
• Too many physical barriers between the camera & Wi-Fi router / repeater
• Wi-Fi signal interruption & interference
• Insufficient bandwidth via PoE switch or NVR
Reason 4 – IR Cut Filter & Faulty IR Night Vision
Some users experience CCTV camera black screen or video going black at night, it’s likely that the camera lacks infrared night vision, or the IR night vision camera doesn’t have an IR cut filter or a faulty IR sensor, or you simply forget to turn the IR on or setup the IR schedule.
Reason 5 – Problems in Cables or Wires
BNC Cables or Ethernet network cables, to some extent, have an impact on the functionality of surveillance cameras.
In such a context, hardwired surveillance cameras will be more likely to encounter with wiring-related glitches, such as video loss on analog CCTV cameras and PoE security cameras.
This is the outcome of a poor installation of CCTV cabling infrastructure like: twisted or bent cables, cables being installed in a close proximity to 240V or the use of cheap cabling.
Reason 6 – Hardware & Firmware Problem
If you rule out power disruption, connection problems, RJ45 Connector / plugs , faulty patch leads ,BNC connector, or cable issue, but still fail to get the bottom of video loss on the cameras, it may be, just maybe comes down to the very fact that your NVR/DVR or surveillance cameras are in a poor physical state.
Or, sometimes, video loss problem could also happen because that the current CCTV camera or NVR / DVR is out of date and a firmware update is needed to sort out the problem.
Reason 7 -IP Address Conflicts
If you can’t solve video loss on security cameras even after checking the power supply and network connection, it is possible that there are IP address conflicts or out of range that stop you from viewing the security cameras.