NUCLEO-H755ZIQ MCU went under low power state while debugging

[Shubhamkeshari]

I am using STM32s NUCLEO-H755ZIQ board , while debugging through eclipse IDE for the M7 core the board's MCU went under low power state and LD6 which is over current led (red) is turned on.

When I am connecting the board with the STM32CubeProgrammer the board is gettting detected but ST-Link is failing to flash the board. 

Please help me with this problem as same thing has happend with the another NUCLEO-H755ZIQ board.

Both the boards are having same problem 

[mƎALLEm · Accepted solution]

In that case either:

1- This regulator is internally short-circuited :

2 - Or you have a short circuit on the board.

To differentiate between the two cases you need to unsolder SB2 and fit again JP2.

If LD6 is lit: the regulator is broken. You need to purchase another board.

If LD6 is off you have a short circuit on the board. In that case you need to check your board and find if VDD is short-circuited.

Hope that helps.