CCTV Maintenance & Troubleshooting Guide
Learn how to diagnose common CCTV problems including cameras with no picture, offline IP cameras, NVR and DVR faults, recording failures, storage errors, night-vision issues and remote-viewing problems.
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Good CCTV maintenance is about more than cleaning lenses. Power, cabling, recording, storage, network connectivity and camera positioning all need to be checked.
Common CCTV Problems
Many CCTV faults are caused by simple issues such as loose connectors, damaged cables, failed power supplies, full or failing hard drives, network interruptions or dirty lenses.
No Picture
Check power, cable connections, the recorder channel and the camera input or network connection.
Camera Offline
For IP CCTV, inspect PoE, network links, IP addressing and switch or router connectivity.
Not Recording
Check storage health, recording schedules, available space and whether the correct channel is enabled.
Night Vision Issues
Inspect IR performance, lens cleanliness, reflections and camera power.
Remote Viewing
Check internet connectivity, recorder status, app login and the network path to the recorder.
Intermittent Faults
Look for unstable power, water ingress, cable damage, overheating and network interruptions.
Step-by-Step CCTV Troubleshooting
Check the power
Confirm that the camera, PoE switch or recorder has power. Inspect power supplies and connectors for damage. Do not substitute unsuitable power supplies.
Inspect cables and connectors
Check Ethernet, coaxial, BNC, DC and patch connections. Look for crushed, cut, corroded or water-damaged cable.
Check the camera status
For IP cameras, check whether the device appears online. Confirm the PoE port or network link is active.
Check the DVR or NVR
Verify that the recorder is running, channels are enabled and the display is receiving the expected camera feeds.
Check storage and recording
Confirm that the hard drive is detected, healthy and has sufficient capacity. Review recording schedules and motion settings.
Test remote viewing last
If local viewing works but the phone app does not, focus on internet, network, account and app connectivity rather than replacing the camera.
CCTV Troubleshooting Table
| Problem | Likely causes | What to check |
|---|---|---|
| Camera has no picture | Power, cable, channel or camera fault | Power supply, connectors, recorder channel and camera status |
| IP camera offline | PoE, network or IP configuration | Switch port, Ethernet cable, IP address and network link |
| NVR/DVR not recording | Storage, schedule or channel settings | Hard-drive status, recording schedule and channel configuration |
| Night image is poor | Dirty lens, IR reflection, low power or unsuitable lighting | Lens, camera position, IR area and power |
| Remote viewing fails | Internet, network, app or account issue | Local viewing first, then router/internet and app connection |
| Camera repeatedly disconnects | Power instability, damaged cable, overheating or network fault | Power, cable condition, temperature and network stability |
Preventative CCTV Maintenance
Preventative maintenance helps identify small faults before they become security gaps.
Clean lenses
Remove dust, insects, water marks and other contamination using appropriate lens-cleaning methods.
Inspect power
Check power supplies, PoE connections and exposed equipment for damage or deterioration.
Inspect cabling
Look for physical damage, loose terminations, moisture ingress and poorly protected cable routes.
Check recording
Periodically confirm that every important camera is recording and that stored footage can be retrieved.
Test alerts
Check motion events, notifications and other configured alerts so failures are discovered early.
Check environment
Inspect cameras, recorders and network equipment for excessive heat, moisture, dust or physical interference.
When should you call a professional?
If a fault involves electrical work, damaged mains equipment, persistent network faults, inaccessible cameras, water ingress, repeated recorder failures or a security system that remains unreliable after basic checks, professional assistance is the safer option. Avoid opening electrical equipment or making unsafe changes simply to restore a camera feed.
CCTV Maintenance for South African Properties
South African conditions can expose CCTV systems to dust, heat, storms, power interruptions, moisture and long outdoor cable runs. Camera selection, mounting, cable protection, surge protection and reliable power should therefore form part of the maintenance plan.
Homes
Prioritise gates, driveways, entrances and other vulnerable areas. Regularly verify that cameras still cover the intended scene.
Businesses
Check entrances, cash or stock areas, loading zones and perimeter cameras. Confirm recording retention and user access.
Farms
Inspect long cable runs, solar or remote power systems, weather exposure and connectivity between buildings and remote cameras.
Related Nexpak CCTV Guides
Frequently Asked Questions
Why is my CCTV camera not showing a picture?
Check the camera power supply, cable connections, recorder channel, input type and camera status. For IP cameras, also check the PoE and network connection.
Why does my CCTV camera keep going offline?
Common causes include unstable power, damaged cabling, PoE faults, network problems, IP conflicts or a failing camera.
Why is my CCTV night vision not working?
Check the lens, IR settings, power supply and nearby reflective surfaces. Objects close to the camera can reflect infrared light back into the lens.
Why is my NVR not recording?
Check whether the hard drive is detected and healthy, whether recording is enabled for the required channels and whether the schedule or motion settings are correct.
Why can I see my CCTV locally but not on my phone?
If local viewing works, investigate internet connectivity, router/network configuration, the recorder's online status and the mobile application's account or device connection.
How often should CCTV systems be maintained?
Perform regular visual and recording checks and schedule deeper preventative maintenance according to the environment, equipment and importance of the surveillance system.
Need Help With Your CCTV System?
Nexpak Security Solutions can help you assess CCTV requirements, troubleshoot system issues and plan reliable security solutions for homes, businesses, farms and other properties.
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