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Hello, I'm new here, I'm setting up the camera system in my house. After some problems with a Dahua NVR (NVR5216-4KS2), I purchased the NVR4116HS-EI and it works perfect. I currently have the ANNKE AC500 cameras (4 in total with 4 more to install) I know they are not the best cameras, but at...

Hello, I just bought a second-hand Dahua NVR5216-4KS2 and when I start it, it does not advance from the "dahua nvr 4.0" image. I'm thinking this could be a firmware bug the previous owner had and was wondering how I could fix it. I have seen that through the RS232 port I could access the boot...