The V1-2 boards have a defect where you need to cut a trace line. Seen in the above picture it is on the top side just unplugged the right side #2 mega and use a knife to cut the trace. For those of you that my of soldered your mega to the the trace line is starts on the negative side of the 12V solder joint just to the left of the board so you can cut the trace on the right side of the solder point.