Arduino MotorShield code running but not motors I have a motor shield V2 on my Arduino, i compile the codes just fine and i'm trying to just run the example dc motor test. The code compiles the serial is printing out the "tick tock ...." but the motors are not running. They ran once before on my mac though. 

Using a 9v battery to power a basic Dc motor. 

I'm using the right ports on pc. Same exact port for motor as the code tells. I'm not sure where i am wrong. TYIA
Turns out the pins connecting the shield to the Arduino are quite loose and didn't "touch" the Arduino.