Built In LED Stopped Working

[kirito2908]

Hello,

I was using STM32 Blue Pill board and it was working fine until few hours ago. It suddenly stopped working. I was trying to make the built-in LED (At PC13) blink using Arduino IDE but it's not even blinking when i do Reset now. 

I've tried Flashing The Bootloader again but that didn't worked as well. Idk what might have gone wrong with it. Is the Reset Button broken " Or It's something else. 

If anyone knows how i can fix this than please let me know. I appreciate any kind of help.  

[Tesla DeLorean]

It's a pin with relatively low sink/source current.

Perhaps try toggling a different pin too and check with a scope or another LED with resistor in series. Check board is running and functional.