@Malk,You must find out.
There are two different boards for iDS-7216HQHI-M1/S
There is also a different version of firmware for the (C) models
- K8A3 board: Home » portal » Technical Materials » 03 DVR » 00 Product Firmware » [Turbo 5.0] » 2nd Gen AcuSense DVR
- K20A9 board: iDS-7216HQHI-M1/S
Check the board number printed on your board beside HDD
Read the .xlsx files" for Turbo 5.0 : "The above models should be upgraded strictly according to the corresponding version"
I found the same, you need to check which board you have. I'd try to load an older version of the firmware, there are no guarantees this will work. You already have a brick.....
Looking at other forums I get the sense that Hikvision retired the TFTP recovery route a few years back, makes it harder for others to recover bricked devices. Others may know better.
David