Mikrotik bricked by backup, reset button not working anymore

I am terribly sorry that I do not have any other ideas. Maybe the board is damaged.

Check if you do not have protected boot options set.

@mrz: Although I have never used this feature (it’s not needed in home environment anyway), is in my case any way to check this?

From docs:

Unsetting of this option is only possible from RouterOS. If you forget the RouterOS password, the only option is to perform a complete reformat of both NAND and RAM with the following method, but you have to know the reset button hold time in seconds.

@AndreasGR: Thank you for you ideas, I appreciate it.

Does this issue have any solution?

Why Mikrotik accepts corrupt or incompatible backup files for restore?

How can I check if a backup is safe to restore?

@normis, why RouterOS accepts corrupt or incompatible backup files for restore?

Thanks in advance

BUMP @normis / @mikrotikstuff

Thanks.