How to fix common CCTV camera problems
If you’re having problems with your Dahua CCTV cameras, this is a quick guide to common problems with Dahua cameras and how to fix. N.B. if you have continued problems with your Dahua CCTV system, get in touch with our team here (this is a paid service).
Cross stripe or diagonal stripe appears in the image of IPC.
Bad connection for the video cable. Check or test with a different cable, connection and port.
Strong current interference. Check if there are other devices causing this issue. It could be the cable too close to another device. Mounting the camera on a metal surface can cause current interference from bleeding electrical currents.
A ground loop can be causing the stripes. Ground loops occur for a few different reasons but this issue will always present itself in the form of horizontal lines running across your screen (hum bars).Faulty power supplies and/or faulty cable are frequent culprits but improper wiring in the home/building is much more common. If you discover that your image problems are related to the power supply or cable, you simply need to swap them out. However, if bad wiring in the structure is found to be the problem, locating it and then having someone fix it is not exactly a quick or cheap fix. This is where ground loop isolators come in. They’re simple plug-and-play adapters that attach to the back of your camera and then filter this electrical noise out of your video feed.
Power Supply. There are several things that can go wrong with a power supply but related problems will always appear in your video as “rolling lines.” These are horizontal lines across your screen that will normally move from bottom to top; lines moving in the opposite are not unheard of so don’t rule it out. The image from your camera will remain behind these lines and will not move with them. This can often be confused with the lines you can get from a ground loop problem, but the lines caused by a group loop will remain in a single static position.
I connect the general analog camera to the device, there is no video output.
There are following possibilities:
Check camera power supplying, data cable connection and etc. There might not be sufficient power from the power source. You can use a voltage tester if you have one on hand.
Check the length of cable run. Refer to the specifications for the limitations on the cable length.
This series device does not support the analog camera of all brands. Please make sure the device supports general standard definition analog camera.
If there is no video, check the coax connection. Unsecured faulty connections will result in no video or intermittent video.
SD card failed to store video.
Check if the SD card status is set as read only status, if so; you need to change it to read/write status.
Check if the SD card can be detected.
Check if the SD card has been damaged.
Check if the SD card is full, if it shows that the residual space is 0, you can format the SD card by WEB interface or check “Cover” in the “Storage management > Video control > hard disk full” of the WEB interface.
Check if the model is compatible with an SD card. Though it might have an SD card slot there might not be SD card reader inside.
IP Camera failed to recognise SD card.
SD card might be loose. Which would case the IP camera not to read recognise the SD card. Check if the SD card is secure.
Check if there is SD card connection pins. Some models may have the slot with no connection pins. If this is the case please refer to the specifications and place of purchase.
Check if the SD card in the computer is recognisable and there is no abnormality.
It is possible the SD card is bad. Try the SD card in other devices to see if it is recognised. It is possible the connections of the SD card are damaged. If this is the case, refer to the place of purchase.
When IR light is on for the HD or SD IR dome, the image is abnormal, such as reflective image or white and unclear image.
Solution: Use the IR-blocking ring of the lens, or reinstall the light-blocking ring to a proper position.
Why is my camera damaged from leaking water?
Users dismantled the front cover and rear cover by themselves, which were not installed properly.
The front cover glass is strongly pressed or crashed.
The waterproof plug of rear cover is loose
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