hcvi

Hi all. I have been researching this topic heavily but I am running into errors. I found multiple firmware files but every time I try to upgrade it the DVR says it failed to upgrade. I think the DVR doesn't recognize the firmware and is blocking it. Upon opening the device I found it has a Dahua...

I am using this device: MODEL: DHI-HCVR5104H-S2 / SERIES: 1A03B30PAEO9H18 This device has had admin account blocked. I am unable to do almost every important thing with this DVR. Please, send me unblock code or instructions on how to do it. Solomon.