I do not recommend you to update the firmware because it will overwrite the internal encryption key and you will loose all chance on a successful outcome.
Please read the datasheet.
traditional ways will not work , nor normal recovery , top proffestional ( LIMITED as in my country ) said controller is burned , maybe some people fucked it before with heat when they trying to repair .
i was shocked that it is giving a signal on the PC when i put , it was not before .
Can you message me with your telegram to work on this together please.