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[First of all, I made an idiotic mistake in my diagram. I added a diagram to help people understand what I was thinking, and I had which cameras were going were backwards in the diagram. I fixed it in the diagram in my post above. Sorry. Nexxt Cameras go directly into Nexxt NVR, because they...

Thank you everyone! well-read and researched people here. While I do want to know definitively what this problem was, and I do believe it is the underpower issue everyone suggested here, I am not an electrical guy and will have to enlist friend to dig deeper with me. But what are the cheapest...

Yes, I agree that sounds like the next test. Neither of these 8 camera (two different brands) came with a wall plug (but that's fine, I should be able to go buy one). But what I also find odd is how the Nexxt camera (black cables) uses the second plug as a RESET button, while the Dahua uses the...

I have a Nexxt NVR unit (Xpy 1280-HD) with 8-channels and it comes packaged with 4 PoE cameras. Used it for a few months. Now I bought 4 more PoE cameras from Dahua (a totally different company/brand). model: Dahua IPC-HFW2439S-SA-LED-S2: IPC-HFW2439S-SA-LED-S2 They don't seem to power on at...