Registered just to say we've just had the same issue on ours, even the MXL export/send to Hikvision/get unlock code didn't work. It said password reset success, but still won't accept the new one. :/I previously downloaded firmware from the global site for my NVR 7608NI which bricked it. Had to get a service agent to fix. I was told at the time that overseas downloads were not compatible with the Aussie hardware, and to only download from Hikvision AU, which incidentally appears to be well behind the times with updates.
The fix for this common problem is to connect up to the serial console, via the internal 4-pin connector on the main board.I think they need to open the box, remove the eprom and flash it, rather than attempt to get to write to it whilst in the box.
So, which version of the firmware did you end up with?The fix for this common problem is to connect up to the serial console, via the internal 4-pin connector on the main board.
Via this, the firmware can be re-applied, or the configuration erased, both of which will reset the device to default settings and clear the data that was corrupted during the configuration database conversion due to the update.
It's a pretty straightforward method.
There are quite a few threads on this topic, such as this example :