I have plugged the camera into the NVR. The IR lights are on the camera, so it's definitely got power going to. But it's not registering in the configuration. So obviously what you say is the case. Is there anyway to manipulate the IP address using manual setting? What if I was to plug the camera back into the POE and see the 192.168.254.x,and match it manually. Mind you, I suppose the camera still using the old password. Sorry, I'm still not fully grasping how this works properly.
In the ideal world things would just work . . .
But, you have several problems that require you to do one thing vs the other. Some of which you have already done and know personally how long it takes with very little positive outcome. This is why I and many others have tried to get as much information as possible with respect to your network setup and environment.
If I was standing there right this moment I would just hard reset everything from camera to NVR. I would also insure the NVR was the only thing connected directly to my computer so I could manage what I accessed.
Given this camera doesn't have a hard reset button this makes the whole process gruelingly hard. As noted early on in your other threads its imperative you only allow one DHCP Server to operate / be connected to. Failure to understand this will result in IP conflict and can take down your entire network. This is seen by the fact your NVR has its own DHCP Server handling out a 192.168.254.X
I have to assume your Router / Modem is handling out the 192.168.1.X (IP Camera 192.168.1.246)
In any other day I would simply tell you to manually change the IP address of the camera to 192.168.254.X to match the NVR. But, as I stated before many of these Chinese NVR's insist you plug the camera into the same exact port each time. So, if you're sure its on the exact same port as it was before this whole problem arose I would probably say use the SADP tool to change it to whatever address is shown in your image capture.
I have to assume its one of the camera's showing Offline . . .