Target Voltage Detection Fail Issue

[BRobe.3]

Hello,

I got a stlm32 disco board. I cannot Flash.

So,I used STM32 ST-LINK UTILITY. Any connection fail even under reset. This one show Target Voltage Detection Fail. The board is powered by the USB CN2 Connector. The measurment on the CN4 Connector shows 3,3 v between 1 and 3 pins.( which seems normal)

Could this be a software issue ?

Best regards,

[NAN]

My test pretty simple => a wire between pin 19 to pin 1