Arduino Robot motor not working (Robot.motorsWrite())

Hi all.

I have an Arduino Robot (https://www.arduino.cc/en/Reference/RobotLibrary)

Seems like my motor is not working. Just wondering if anyone encountered this before?

I've tried hard resetting the boards and also burning a new bootloader (http://forum.arduino.cc/index.php?topic=316879.0) seems like the motors won't run at all.

I suspect it's a hardware problem, but just in case anyone faced this before and found a solution.

The IR sensors work perfectly since I can read the values from Arduino Robot Control updateIR() and Arduino Robot Motor IRread() via serial port over the time

If you read the instructions you will see that the motors are disabled when USB is connected. Could that be your problem?

Sorry I forgot to mention, I did unplug the USB cable, still the motors not moving.

Try some of the example sketches. If none of them work then your board is probably damaged.