2025-09-09 3:33 PM
I was performing a firmware update to my board when the board lost connection to my computer. Ever since then I have been unable to connect to the board. I tried going through STM32CubeProgrammer to perform a connect under reset, which just says "Error: Problem occurred while trying to connect". I have also attempted to hold the reset button while performing a full chip erase but I receive an error: must connect before performing action. I have all my jumpers in the correct place and even tried jumping BOOT0 while performing the connect under reset. I would love some help from someone who has possibly been through this before, thank you.
2025-09-09 3:38 PM
Here is also a view of my Programmer while I try the connect under reset. I read that the 0V is an issue but I am lost on what to do next. I am using the most recent version of Programmer available for Mac.
2025-09-09 4:10 PM
LD3 not lit indicates no 5 V power. LD1 solid red indicates the ST-Link connected okay.
Is the JP5 jumper present?
Recovery would be to hold BOOT0 high (to 3.3V) while pressing the reset. That should let you connect, unless there's a hardware failure.
What does/did the firmware on it do?
Don't place on conductive surface.
User the schematic to probe around and find out where 5 V power is getting stopped. Probably the USB power is coming in okay if LD1 is on.