STM32 MCUs Boards and hardware tools

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Nucleo-F446RE board not recognized (anymore) at all (windows). When I plug the USB cable, I get 4 red slow flash then nothing more. How can I reflash or restore the mBed firmware in the nucleo programmer ?

Yesterday, while debugging in mBed, I experienced strange problems like being unable to debug, unless i unplug and replug the board. Maybe unrelated.Today, the board is not recognized (USB descriptor problem it seems).

laurentz by Associate
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