hello ...i have been trying a demo code on my frdm kl25z board. So i loaded the program and disconnected the usb, then connected the battery. It worked. But after , when i connected the board to the pc to load another program , the green led did not glow and mcu heated up like in 5 sec only. So i disconnected. Now my board does not work and the mcu heats up everytime within 5-6 sec. Help me..