How to Swap BNC Connectors to Video Input to Confirm Video Loss

Super Admin
01 May 2026
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DVR4-4480G, DVR4-4480RN, DVR4-4480V, DVR4-4580G, DVR4-4580RN, DVR4-4580V, DVR4-4680, DVR4-4680RN, DVR4-4685, DVR4-4685RN, DVR4-4780V, DVR4-4980V, DVR4-5580, DVR4-5580G, DVR4-5580RN, DVR4-5680, DVR4-5680RN, DVR8-4480G, DVR8-4480RN, DVR8-4480V, DVR8-4580G, DVR8-4580RN, DVR8-4580V, DVR8-4680, DVR8-4680A, DVR8-4680RN, DVR8-4685, DVR8-4685RN, DVR8-4780V, DVR8-4880RN, DVR8-4980, DVR8-5580, DVR8-5580A, DVR8-5580G, DVR8-5580RN, DVR8-5580RU, DVR8-5680, DVR8-5680A, DVR8-5680RN, DVR8-5680RU, DVR8-5880RU, DVR16-4580G, DVR16-4580RN, DVR16-4580V, DVR16-4680, DVR16-4680A, DVR16-4680RN, DVR16-4680RU, DVR16-4880RU, DVR16-4980, DVR16-5580, DVR16-5580G, DVR16-5580G2, DVR16-5580RU, DVR4-4680XN, DVR4-4680XU, DVR4-5680XN, DVR8-4680X, DVR8-4680XN, DVR8-4680XU, DVR8-5680X, DVR8-5680XU, DVR4-1590, DVR8-1590, DVR4-1600, DVR8-1600, DVR4-4480, DVR8-4480, DVR4-4575, DVR8-4575, DVR16-4575, DVR4-4580, DVR8-4580, DVR4-4780, DVR8-4780, DVR4-4980, DVR8-4980, DVR16-1000, DVR4-1250, DVR8-1250, DVR4-1260, DVR8-1260, DVR4-1425, DVR8-1425, DVR9-1425, DVR12-1425, DVR16-1425, DVR8-1450, DVR4-1580, DVR8-1580, DVR4-2555, DVR8-2555, DVR8-2900, DVR4-3000, DVR8-3000, DVR16-3000, DVR8-3200, DVR16-3200, DVR4-3250, DVR8-3250, DVR16-3250, DVR8-3260, DVR4-3425, DVR8-3425, DVR16-3425, DVR4-3450, DVR8-3450, DVR4-4000, DVR8-4000, DVR16-4000, DVR4-4100, DVR8-4100, DVR4-4150, DVR4-4200, DVR8-4200, DVR9-4200, DVR16-4200, DVR4-4400, DVR8-4400, DVR16-4400, DVR4-4550, DVR8-4550, DVR16-4550, DVR4-4600, DVR8-4600, DVR4-4750, DVR8-4750, DVR8-5000, HDR6-8000, HDR6-8100, HDR4-8200, DVR4-1500, DVR8-1500, DVR16-1500, DVR4-1525, DVR8-1525, DVR4-1550, DVR8-1550, DVR16-1550, DVR8-1575, DVR24-4300, DVR4-4350, DVR8-4350, DVR4-4500, DVR8-4500, DVR16-4500, DVR8-4900, DVR8-8050, DVR8-8075, HDR8-8050, HDR8-8200, PRO-1080DER, PRO-1080MQB, PRO-1080MSB, PRO-1080MSFB, PRO-1080MSD, PRO-1080PTZ, PRO-1080SL, PRO-1080SQ, PRO-2KMQB, PRO-3MPMSB, PRO-3MPMSD, PRO-4K1DOME, PRO-4KDER, PRO-4KDOME, PRO-4KMSB, PRO-4KMSD, PRO-4KMSFB, PRO-4KMQB, PRO-4KRL, PRO-4KRQ, PRO-4KWLB, PRO-5MPMSB, PRO-5MPMSD, PRO-5MPMSFB, PRO-1080FLB, PRO-1080FLD, PRO-1080ZLB, PRO-1080ZLD, PRO-A850CAM, PRO-A850V, PRO-A851CAM, PRO-A851V, PRO-A852PTZ, PRO-A855CAM, PRO-A856CAM, PRO-H850CAM, PRO-H851CAM, PRO-H855CAM, PRO-H856CAM, PRO-T835CAM, PRO-T836CAM, PRO-T845CAM, PRO-T850CAM, PRO-T852CAM, PRO-T853CAM, PRO-T855AF, PRO-T855CAM, PRO-T857CAM, PRO-T858CAM, PRO-T859CAM, PRO-T890CAM, PRO-T891CAM, PRO-751CAM, PRO-770CAM, PRO-842CAM, PRO-843CAM, PRO-960CAM

If you are experiencing video loss with one of your DVR cameras, perform the following troubleshooting steps to identify if the VIDEO INPUT port (channel) is faulty.

video_loss_swap_video_input.png

How to test

  1. As per image above, swap CH1 (port having Video Loss issue) and CH2 (known working port).
  2. Check the "Video Loss" error again. 
    • If "Video Loss" remains on the same channel, then the VIDEO INPUT port of that channel (CH1) is faulty.
    • If "Video Loss" changes to the other channel (CH2), then it's possible that either the BNC extension cable or the camera is faulty. 
TIP: If the above troubleshooting did fix the issue, proceed with Power Adapter (PSU) swap and then BNC extension cable swap to further isolate the Video Loss problem.

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