Do not flash firmware from the DS-7616 unless you are 100% sure it matches the K41 platform. When in doubt, contact Hikvision support with your serial number.
As a popular 16-channel 4K NVR, the DS-7616NI-K2 frequently receives updates that improve the GUI (Graphical User Interface) and enhance remote viewing performance via Hik-Connect. Official DS-7616NI-K2 Firmware Download Links ds7616nik2 firmware link
Even with the correct ds7616nik2 firmware link, you may encounter errors. Do not flash firmware from the DS-7616 unless
The firmware for the Hikvision DS-7616NI-K2 NVR is typically found on the official Hikvision download portals, though it is critical to select the version that matches your specific region and hardware revision to avoid "firmware mismatch" errors. Direct Firmware Links Official Hikvision Portal: ds7616nik2 firmware link