Target not connected and st link not detected

pushkarmondhe · ‎2025-07-21

"Hello, I am using a NUCLEO-H7A3ZI-Q board. I flashed two programs successfully, but on the third attempt, it stopped flashing because I accidentally forgot to enable Serial Wire Debug. Now, when I connect a charging cable, it shows 'No target found,' and when I connect a data cable, it shows 'No ST-LINK detected.' Please help.

MHoll.2 · ‎2025-07-21

Try setting BOOT0 to High (set Jumper before powering the Board!).

On the NUCLEO-H7A3ZI-Q BOOT0 is on CN11 Pin 7, You can Jump this signal directly to CN11 Pin 5.

View solution in original post

Andrew Neil · ‎2025-07-21

How to solve connection errors when connecting and programming the STM32 target board.

How to solve debugger connection issues

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

MHoll.2 · ‎2025-07-21

Try setting BOOT0 to High (set Jumper before powering the Board!).

On the NUCLEO-H7A3ZI-Q BOOT0 is on CN11 Pin 7, You can Jump this signal directly to CN11 Pin 5.

pushkarmondhe · ‎2025-07-21

Hi @Andrew Neil @MHoll.2 Thanks for reply. Now it is working