I've just got my Teensy4.0 and done some testing-
Now i have this little problem:
I'm using Arduino IDE 1.8.9. I did upload a simple sketch, LED blink with serial read out.
But i don't get any text in the serial monitor.
I have tried with COMport setting: Port 3. Windowbar shows: TeensyMonitor COM3 Online.
Also: COMport 3 Serial (Teensy4.0). Window bar shows: COM3 (Teensy) Serial.
I also tried with several different baudrates(9600, 19200, 38400, 115200).

unsigned long prevTime = 0;
const long interval = 2000;
int state = LOW;

void setup() {
  // put your setup code here, to run once:
  Serial.println("TEST Analog");
  pinMode(out, OUTPUT);
  digitalWrite(out, LOW);
  //Serial.println("TEST 1");

void loop() {
//   put your main code here, to run repeatedly:
  unsigned long curTime = millis();
  if (curTime - prevTime >= interval) {
    prevTime = millis();
    if (state == LOW) {
      state = HIGH;
    } else {
      state = LOW;
    Serial.print("state ");
    digitalWrite(out, state);

So do is there someone that can tell my how to get serial monitor to work?
In advance, thank you.