Resolved! How to factory reset Nucleo F103RB board? NUCLEO Board F103RB - Error in initializing ST-LINK device. Reason: No device found on target.
Here is what I did - From CubeMX, I mistakenly change port configuration of port pin PA14 from SYS_JTCK-SWCLK to GPIO_Output.Apparently this disabled the debug / programming channel of the target micro controller on the board.Later I reset the port p...