How is the boot-loader reset if it was wiped?

[AAero]

I loaded a blank Arduino program, and now it's not recognized by mass storage (USB). Is there a way to get the board back? Do I need to buy a special cable? run a certain program?

[Tesla DeLorean]

Not something ST puts on the boards, check with the board vendor for what they are using

Try stm32duino, forum seems down currently

https://github.com/stm32duino/wiki/wiki

http://stm32duino.com/

[AAero]

Another colleague looked at it and says it's fried. The over-current LED or something was on.