After about a year I have returned to playing with STM32F4 Discovery board. Last time I have used the board and ST-Link Utility everything worked as it should.
This time however, it doesn't. I connect the board with ST-Link ( USB driver ), erase the flash, and upload a .bin program ( the demo program that MCU came flashed with at purchase ). Hex program and ST-Link worked well last time I used it.
Now when I go to Target -> MCU Core and select "System Reset", I get "Core State: Lockup". Therefore I can't Run the application ( I get "Unable to run application" ).
What could be the problem in my case ? What could change since the last time I used the board, when it all worked well ?
Thank you and kind regards,