A camera goes black, the app says “offline”, or last night”s footage simply is not there. Most CCTV problems have a handful of common causes – and many you can check yourself in a few minutes before calling an engineer. Work through this guide in order; it moves from the quick, free checks to the ones that need a professional.
Before you start: note exactly what is wrong (which camera, when it started, what the app shows) and never open mains-powered equipment. Power and height work should be left to a technician.
Common problems at a glance
| Symptom | Likely cause | First check |
|---|---|---|
| No image / black screen | Power, cable, or lens | Power LED, cable, day vs night |
| Camera offline in app | Network / PoE / IP | Reboot NVR & router, check cable |
| Not recording | Full or failed hard drive | Check HDD status & overwrite setting |
| Poor night vision | IR, dirt, or reflection | Clean lens, check IR at night |
| App not connecting | Internet / login / P2P | Test on site Wi-Fi, re-login |
No image or black screen
Check the camera has power (an LED or IR glow at night). Re-seat the cable at both ends. If the image is black only at night, the infrared may have failed; black only in day can be a stuck day/night filter. A single dead camera with others working usually means a cable, connector or the camera itself.
Camera shows offline
Reboot the NVR and router first – it clears most network glitches. Then check the network cable and, for PoE cameras, that the port is powered. If one camera is offline, suspect its cable or power; if all are offline, suspect the NVR, switch or network.
System is not recording
The usual culprit is the hard drive: full with overwrite disabled, or failed. Check the storage status in the NVR menu, confirm continuous/motion recording is set, and look for a drive health warning. Drives are consumables – in 24/7 use they wear out and need replacing.
Poor or no night vision
Clean the lens and housing – dust and spider webs reflect IR and wash out the image. Make sure the camera is not pointing through glass, which bounces IR straight back. If IR LEDs do not glow at night, the night mode or IR board may have failed.
When to call a professional
Call an engineer for work at height, mains power, suspected drive failure, footage recovery, or faults you cannot isolate. A pro can test cables, swap hardware and recover recordings safely. We offer same-day CCTV repair and planned maintenance / AMC across the UAE.
More faults and quick fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| No audio | Mic off or unsupported | Enable audio in settings; check the camera has a mic |
| Too many motion alerts | Sensitivity too high / no AI filter | Lower sensitivity; enable person/vehicle detection |
| Footage overwrites too fast | Drive too small for retention | Add storage or lower resolution / frame rate |
| Wrong timestamp | Clock / NTP not set | Set time zone and NTP on the NVR |
| Blurry image | Dirty dome or lost focus | Clean the dome; refocus or replace the lens |
A simple monthly maintenance checklist
Ten minutes a month prevents most “the cameras weren’t recording when we needed them” disasters:
- Confirm every camera is online and the image is clear.
- Check recording is active and the retention period is correct.
- Look for hard-drive health warnings in the NVR.
- Clean lenses and domes – dust and webs ruin night vision.
- Test remote/app access and that alerts actually arrive.
- Verify the time and date stamp is accurate.
Why an AMC pays for itself
A CCTV system is only useful if it works the day you need the footage. An annual maintenance contract puts these checks on a schedule, gives you priority response when something fails, and keeps drives and firmware current. For most businesses the cost of an AMC is a fraction of the cost of discovering – too late – that the one camera that mattered was offline.
Camera down or not recording?
Same-day CCTV repair and AMC support across Dubai & Abu Dhabi. Tell us the fault.
Get CCTV repairFrequently asked questions
Why is my CCTV camera showing a black screen?
Usually power, cable or lens. Check for a power LED or night-time IR glow, re-seat the cable both ends, and note whether it is black all the time or only at night – night-only points to failed infrared.
Why is my CCTV not recording?
Most often the hard drive is full with overwrite turned off, or the drive has failed. Check the NVR’s storage status and recording schedule; drives are consumables and wear out in 24/7 use.
All my cameras are offline – what do I do?
Reboot the NVR and router first, which fixes most network glitches. If they stay offline, suspect the NVR, network switch or internet rather than the individual cameras.
Can you recover footage from a failed CCTV drive?
Often yes. We attempt recovery from damaged or failed NVR drives and can advise the likelihood before any work – contact our repair team for an assessment.