My red electrical board (REB), V16.9, won’t turn on with just the battery pack attached. And I know the batteries are fine because I’ve tested them to make sure they have full power and they do. I only get power on the REB when the Pi (B+ V1.2) is connected to it and the micro usb slot on the Pi is providing power; however, in this case, the Pi won’t turn on. And the Pi works perfectly fine when not connected to the electrical board. Help?! I’m using this for an individual project in my Masters class and can’t do anything with the rover if I can’t connect to the electrical board.