Opel TID Display

Using Arduino Displays
50

Hi there,

I bought myself an Arduino Nano for displaying the current speed in my Corsa C with 10 letters display.
At first I simply extended the .ino file from the first page. But nothing happend. Then I tried the lib from dandymon by running the example. But still nothing is happening. Im using this code:

#include <TID.h>
//Created by Daniel Crane
TID mydisplay(3,4,5);//SDA, SCL, MRQ

void setup()
{
  pinMode(13,OUTPUT);
}

void loop()
{
    mydisplay.display_message("SCROLLING MONKEY5!",500);
    digitalWrite(13,HIGH);
    delay(500);
    digitalWrite(13,LOW);
    delay(1000);
  
}

I've connected SDA to D3, SCL to D4 and MRQ to D5. But even the LED L on the board doesnt light. When uploading the basic blinking sketch from Arduino examples, the LED starts to blink right after uploading.

I've experienced another problem. When connecting a 12V= powersource to VIN, the LEDs RX and TX start to light, but even the blinking sketch doesn't start to blink LED L. Only if I connect 5V= via USB from a power supply for mobile phones, L starts to blink.

Im using Arduino 3.0 and Im new to Arduino, but Im very experienced writing C-code. Im not too familiar with C++.