So I am a total newb with all this stuff. I have a 31 camera system all HIkvision setup connected to 2 nvrs. The company that installed it was suppose to service it but they went out of business and left me high and dry. So I had my security room camera backed up to a secondary nvr. I had my nvr crash on me so I ordered a new one(same model) and now I am having an issue adding the camera to the new one. It says no ip cameras available and all 31 cameras are showing up but say connected to other device. I have spent about 6 hours online trying to figure this out. Any idea of what I need to do?