How to Fix 'Video Loss' & Replace a BNC Connector
Camera showing 'Video Loss' or a black screen? 90% of the time, it's a loose or faulty BNC connector. Learn how to strip the wire and attach a new connector in minutes.
Step-by-Step Instructions
Identify the Faulty Camera Cable
Go to the back of your DVR and find the port where the faulty camera is connected. Gently wiggle the BNC connector. If the video flickers on the screen, the connector is loose and needs replacement.
Pro Tip
Before cutting any wires, make sure the camera's power supply is plugged in and working. Sometimes a dead power supply causes a black screen too!
Cut the Old Connector
Using your wire cutter, snip off the old BNC connector completely. Leave yourself enough fresh wire to work with.
Warning
Make sure you do not cut the wire too short, or it won't reach the DVR/Camera.
Strip the 3+1 Coaxial Cable
Carefully strip about 1.5 inches of the black outer jacket. Inside, you will see a thick copper wire covered in white plastic (for video), and some copper mesh. You will also see red and black wires (for power). We only need to focus on the video wire for the BNC.
Attach the New BNC Connector
Take your new screw-type BNC connector. Unscrew the back end. Connect the thick solid copper wire to the positive (+) center pin screw. Connect the copper mesh (shield) to the outer (-) grounding screw. Tighten both securely.
Pro Tip
Ensure no stray hair-like copper mesh wires are touching the thick center copper wire. This will cause a short circuit and video loss!
Test and Tape
Plug the new BNC connector into the DVR. Check your monitor. If the picture is clear, wrap insulation tape tightly around the exposed wires to protect them from moisture and dust.
Looks too complicated?
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Book a Technician NowTools Required
- Wire Stripper / Cutter
- New BNC ConnectorBuy in Store →
- Insulation Tape