How to reset Nucleo F401RE (Blocked board)

[LHerm.1]

Hello everyone, I'm new on STM32.

My Board is blocked in this state (see on the photo) : 2 led at red state continuously.

And when I try to load program in the board, this type of erros occured : Error launching GDB server.

Thanks for your Help !

[Tesla DeLorean]

Jumper BOOT0 to VDD, reset or power cycle the board, and try connecting / erasing with STM32 Cube Programmer directly.

[LHerm.1]

Thank for your response ! But i don't have STM32 Cube Programmer..

Sorry but where is the jumper BOOT0 ? And wath do you mean by power cycle the board ?

Sorry for my bad understanding ..

[Tesla DeLorean]

Google and download a copy of STM32 Cube Programmer, avoids the IDE/GDB nonsense

Review the board manual, there are diagrams and schematics. There are a couple of spare jumpers attached to board, see upper top right and left.

Short the VDD and BOOT0 pins with said jumper. Puts the chip into loader mode, not running your code, that's probably bricking the board

Power cycle, remove and reapply power to the board via the connector.

https://www.st.com/en/development-tools/stm32cubeprog.html