St-link is not detecting custom stm32h753zi board suddenly

[santhosh16]

Hey friends,
Until yesterday, my custom board with the STM32H753ZI100_24 MCU—connected to an IMU sensor, magnetometer, and barometric sensor via SPI—was detected successfully by STM32CubeIDE. But today, when I came to the office, I’m unable to initialize the ST-Link device, which I used to program the board through Vaap, GND, SDIO and SWCLK pins in the st-link.

Here are the steps I’ve tried so far:

• Restarted my Linux PC

• Removed all power from the board and the ST-Link V2, checked the connection and then reconnected everything

• Connected the ST-Link to another STM32 MCU on the same board, and it works fine

• Verified 3.2 V power supply to the MCU with a multimeter which is needed for mcu to power up.

Despite this, I still can’t get the ST-Link to detect the board. Could this be caused by something in the last code I flashed, or is it likely a hardware issue?

Any advice or suggestions would be greatly appreciated!

Thanks in advance.

[santhosh16]

Additional to this there is an another dialog box arises when i debug or run the code.

 what are the reasons this might get

[TDK]

Can you connect with STM32CubeProgrammer?

Can you show the board schematic? Could be a design issue.

Can you monitor power drawn by the board? If it's drawing excessive current, it could be dead.

Put the chip into bootloader mode and then try to connect (in STM32CubeProgrammer).