Arduino vma207 shield, M2 won't drive

Arduino(TM) Shields
1

Hey, at My school we got a bunch of these sheilds, and for some reason THE m2 does not work
No One knows why. We tried more voltage voltage and stuff.
Anyone got a clue ? We now use only m3 and m4 for THE all THE 4 motors.
Cheers

2

Dear,

Try these code to get motor 2 (M2) work.
Also pay attention for applying motor voltage (ext power).
Motor voltage are from: 4,5V to max. 16V DC.

If this not work check the motors and connection.
Or change IC1 (L293D) this driver controls motor 1 & 2. This chip can be defective as well during experiments.

Regards
Velleman support

Code:

// Adafruit Motor shield library
// copyright Adafruit Industries LLC, 2009
// this code is public domain, enjoy!

#include <AFMotor.h>

AF_DCMotor motor(2);

void setup() {
  Serial.begin(9600);           // set up Serial library at 9600 bps
  Serial.println("Motor test!");

  // turn on motor
  motor.setSpeed(200);
 
  motor.run(RELEASE);
}

void loop() {
  uint8_t i;
  
  Serial.print("tick");
  
  motor.run(FORWARD);
  for (i=0; i<255; i++) {
    motor.setSpeed(i);  
    delay(10);
 }
 
  for (i=255; i!=0; i--) {
    motor.setSpeed(i);  
    delay(10);
 }
  
  Serial.print("tock");

  motor.run(BACKWARD);
  for (i=0; i<255; i++) {
    motor.setSpeed(i);  
    delay(10);
 }
 
  for (i=255; i!=0; i--) {
    motor.setSpeed(i);  
    delay(10);
 }
  

  Serial.print("tech");
  motor.run(RELEASE);
  delay(1000);
}