If you are unable to reach the camera after replacing the pigtail there are many troubleshooting steps that your should take :-
1. Test the power:
✔ Is everything plugged in? You should check.
✔ Cup your hand over the lens to block out any light and listen for the click as the IR board comes on. If it does skip to 2-1.
✔ Since the IR did not click on, test the power source with another camera. If the other camera powers on skip to 3-1. If you don't have another camera continue to 1-4.
✔ Use a different port on the PoE switch, or use a different 12vDC adaptor. The output should be 12V DC 1amp. If it still won't power on skip to 3-1.
2. Locate the camera on the network:
✔ Make sure that all of the devices you're using for testing are wired into the same network and powered on.
✔ You can use the IP Config Tool that came with the camera on the mini disc or if you don't have the disc you can find it in our downloads section. Use the software to locate the camera on the network. Change it's IP address to match the scope of your network, but outside of the DHCP range to avoid an IP conflict. For assistance in changing the IP address of the camera using the IP Config Tool follow this guide here.
✔ With a changed IP address that matches the scope of your network, you should be able to access it via the web service (at its IP address through the IE11 web browser).