I have a question about the what I should see and expect from my Arduino during set-up. I have a Arduino Genuine Uno and a Arduino Motor Shield. I have the UNO connected to my laptop and the MS connected by a 12V power supply. When I type <1> enter in the serial monitor the A and B power connectors 4 leds light up, When I type in <D> enter the 4 leds flash. This apparently means that I have done everything right to this point. The question I have is should I now have power at the A and B connections ( I don't)? Setting up JMRI is another issue. I appreciate any help.