I have order x-Nucleo-531L1A2 and got the board, now I found the document(UM2759) description is different with my board. such as there is white "Display" text on board from doucment, but my board hasn't this "Display" text, same time some unit also ...

 same time I try to drop the bin file to device directly, but it's still fail and feedback a message "The application file format is unknown and cannot be parsed and/or processed"Currently i can't sure what's reason caused this issue? Is it related t...