I have an issue with the board not printing to the serial monitor, the program upload fine. the serial monitor works for a more complex program but not for the simple one below

Start your code here
// the setup function runs once when you press reset or power the board
void setup() {
Serial.begin(9600);
}
// the loop function runs over and over again until power down or reset
void loop() {
Serial.println("Hello World");
delay(1000);
}

What could the issue be that prevents some programs from printing to the serial monitor?