Dahua 3104-P firmware or motherboard?

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Hello,

I have a problem with Dahua NVR 3104-P. It restarts itself... If I change a language from Italian to English, it requires restart and after restart the language is Italian again. Next, sometimes it sees HDD as 500GB instead of 2TB? I tested HDD in my PC and it passed all tests.

 

Is the problem with motherboard in NVR or maybe some firmware update can fix it?

 

 

Next question is, if I decide to change NVR, do I need to buy Dahua NVR or every other will work with the Dahua IP Poe cameras. The cameras models are: IPCHDW4100P, IPCHFW5100CP and IPCHFW4100P.

 

Thanks a lot.