My on board ST link V3 cannot work?

[RZHU.1]

The development board is STM32H757I-EVAL which has a ST link V3 on it,but after I download my program (just once) and update the firmware, it cannnot work correctly.

Here is the situation when I try to debug it:

[Tesla DeLorean]

Jumper BOOT0 High, power cycle the board a couple of times, when STM32 Cube Programmer can attach, erase the device.

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The check the LDO/SMPS and VOS configuration in your code, and if the debug port or pins are being disabled.​

[RZHU.1]

Thanks so much!

I just switch the SW1 to set the boot0 HIGH, then it works!