External power supply STM32L432KC

[DndrGunnr]

Hello,

I was experimenting with the L432KC board. While connected to the computer everything worked fine, but as soon as I tried to use an external power supply everything stopped working. More specifically the board's led LD1 slowly flashes when connected to the external power supply. I firstly tried a USB powerbank when I encountered this problem, then i read a thread saying that due to an USB enumeration problem, this couldn't be a viable solution.

I also tried using a battery pack connected to every combination of inputs possible (accordingly to Table 5 in the user manual).

I also tried to close the SB10 bridge, but the result is always the same.

[TDK]

> More specifically the board's led LD1 slowly flashes when connected to the external power supply.

LD1 flashing indicates that the USB has not been enumerated. Since it's not connected to a computer with a USB host, that is the expected behavior of that LED.

Are there other things that it's not doing that lead you to believe that "everything stopped working"? What are those things? What is the program supposed to do?