I'm stuck at this exact spot as well!! Anyone have any ideas how to progress this?
If SADP is showing the device as 'Inactive' - that means it's been reset to factory default settings.
The NVR needs to be 'Activated' to bring it back to normal operation.
'Activation' is achieved by creating a new admin password.
The easiest way to do this (saves having to mess with the PC IP address) is to use SADP.
Select the device in the checkbox against it on the left.
The Activate settings should appear, allowing a new password to be specified, at which point the device should show as Active.
Then - use SADP and the new admin password to change the IP address to one that is in your LAN address range.
Then the browser can be used to log in to the web GUI normally.
By the way - the Hikvision
tftp updater tool cannot be used to apply firmware to I-series NVRs, as the firmware filesize is larger than its 32MB filesize limit.
If a tftp updater method must be used to apply firmware, Scott Lamb's Python2 clone does not have the 32MB filesize limit.
Unbrick a Hikvision device (NVR or camera) via TFTP - scottlamb/hikvision-tftpd
github.com