Something to keep in mind. One of your cameras might be going bad.. I had a Dahua 4mp AI camera fail in POE and took out all POE cameras that were connected on my POE NVR ports all other channels were online. When I connected the cameras to my POE switch again all POE devices went offline even ones that were already working on a different NVR.. In order to get that to work I had to reboot my POE switch. So didn't remember if any of them were POE+ so thought ok try on that Switch and this time rather then plug them all in and wait for them to come online all at one time. I did them one by one and sure enough my Dahua IP4M-N45EF63 caused my whole POE+ switch to shut down and had to reboot the switch.. After taking the bad camera apart I found that a SMD Common Mode Choke had failed and was the cause of issue. Lucky for me it damaged in a way that was a Open and only damage was the SMD common mode choke.. I have since repaired this camera and it is back in service now for the last 7 months without another failure so far..
dahua NVR just stopped displaying cameras?? how to fix?
- Thread starter wozzzzza
- Start date
Thanks for your reply! This morning I realized that these two cameras that were causing troubles are connected via one cablewith switch ATTE xPoE-3-10 3! There was only one wire prepared and I wanted two cameras in that region and my electican asked me to buy ATTE xPoE-3-10 3 to split the signal and have two cameras there. Which means that "thing" may be causing conflict with switch that is next to NVR.
Sorry don't know how Poland works. Does your area not offer a Low Voltage or Security camera specialist to work on CCTV or IP camera networks? If you are within the normal 100m personally I would have went with a cable split. Normally cameras can work on af and at using only 4 of the 8 ethernet wires. Using 1, 2, 3, 6 pins of the ethernet plug, There are 4 pairs in a normal Cat5E or 6 cable. Just by adding 4 plugs 2 on each end can work POE Ip cameras and even normal 12v power IP cameras without extra hardware.
With your POE Extender that you bought is it powered with an ATTE passive device or a normal POE or POE+ Switch?
With your POE Extender that you bought is it powered with an ATTE passive device or a normal POE or POE+ Switch?
If the problem is by ATTE xPoE, you can try to replace ATTE with a new one...
or go to passive variant like:
In passive splitter variant You need 2 ethernet/POE ports on switch/NVR side..
I'd love to answer your question but honestly, I don't know. Electrician that was responsible for the wiring and connecting these cameras is currently unavailable so I can't reach out to him and ask.
For now - I reconnected the cameras to different ports of the same dahua switch which I got installed next to the NVR and it suddenly works straight 2 days without failiure. Strange! :/
EMPIRETECANDY
IPCT Vendor
Looks like the NVR power module failed. Need to replace it.
bigredfish
Known around here
No need to replace a Dahua PoE NVR if the Poe ports fail. Simply use an external switch.
EMPIRETECANDY
IPCT Vendor
what i mean replace is this part
IF the NVR POE ports of say 5-8 are working and 1-4 have died then the Power supply isn't the issue. If you can take your camera and connect to a different port of the NVR then 1 of a few things has happened.. 1 the Ethernet Transformer has died, Most likely caused by using CCA cables or some other type of issues that has burned it out. However if you are connected to 1-4 and when you connect to another port on 1-4 and works then it could be a Protection Diode in the NVR for that channel that is dead.. Now I don't know all the NVRs out there but I have repaired a good few to know that if the Power supply is going bad then it would take out all ports of the POE Switch of the NVR.. Even to the point where the NVR won't even power on. Some NVRs when the Ethernet Transformer goes bad even on one of the 4 connected channels there is in some cases where it clamps down and makes it all don't work. Meaning 1-4 Ethernet Transformer burned up port2 it can clamp down the 1, 3, 4 as a way to protect the circuit past that point. Some lets say 16ch POE NVRs can run 4 ethernet transformers and in some I have seen where they only have 2 and in that cases would take out either 1-8 or 9-16. Most would have 4 and only take out 1-4, 5-8, 9-12 and 13-16..
I don't know how long you were using your NVR before you issue came up. What I do know is what ever caused that issue in the first place, Moving your cameras to a new port is good for testing that the cameras are not dead, Not a good idea to run the system very long without someone testing the Wiring and external hardware to make sure they were not the cause.. If the issues was caused by a storm, then I would make sure to double check your storm protection hardware. If you are not running any it is time to get it in place before something worse happens..
I don't know how long you were using your NVR before you issue came up. What I do know is what ever caused that issue in the first place, Moving your cameras to a new port is good for testing that the cameras are not dead, Not a good idea to run the system very long without someone testing the Wiring and external hardware to make sure they were not the cause.. If the issues was caused by a storm, then I would make sure to double check your storm protection hardware. If you are not running any it is time to get it in place before something worse happens..