I uploaded a code to Gen2 and after that the 'L' led started blinking. Even after I removed the power cord and reconnected it only the 'L' led is blinking. I also tried to reboot and reset the Gen2 but, the problem persists. Please help!
What code did you upload? According to your description, it seems that you uploaded the Blink example from the Arduino IDE.
Additionally, are you using the SD Yocto image?