If you can just move one of those yellow wires from say, pin 11 of the Arduino, to pin 12, make the appropriate change to the program and it works, then it must be the Uno or the Atmega328 on it.
If you can just move one of those yellow wires from say, pin 11 of the Arduino, to pin 12, make the appropriate change to the program and it works, then it must be the Uno or the Atmega328 on it.