user18783: Just trying to find out if my Arduino UNO R1 board is broken or not.
First of all, everything seems normal, Arduino board shows "on" (green) when I plug it on my computer, I also can verify and upload programs to my Arduino board. But, no matter what program I upload the pin 13 turns on and off 3 times and that's it. I'm checkin it by using a LED. 
Eg. if I want to use another pin (ex. 7, 8, 12) it doesn't work, or even to write a program for turning on/off 9 times pin 13 doesn't work... 
Note: I noticed that pin 8 turns the LED for less than a 1/2 a second.
I already tried to restart board by bridging the reset pin and also by pushing reset directly on the board, I also reinstalled Arduino Genuino Application. I thought to update Atmega8U2 firmware but accordingly to Arduino site I don't need to update since I have firmware rev. 0.01.
It would be also great not to have to buy a new Arduino UNO. Thanks for your help
Edit:
Here is how I'm trying to make pin 12 work
int ledPin = 12;

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

void loop()
{
    digitalWrite(ledPin, HIGH);
    delay(2000);
    digitalWrite(ledPin, LOW);
    delay(2000);
}


user18770: The best way to check if Arduino is working or not is to install Firmata. Here's the necessary steps:
1) Download Firmata application from the official website. 
2) Connect Arduino to the computer
3) Open the Arduino IDE and burn the example Standard Firmata [File - Examples - Firmata - Standard Firmata]
4) Open the application, leaving the Arduino connected. 
5) Chose the right serial port and debug every pin =D

18783: <p>Just trying to find out if my Arduino UNO R1 board is broken or not.</p>

<p>First of all, everything seems normal, Arduino board shows "on" (green) when I plug it on my computer, I also can verify and upload programs to my Arduino board. But, no matter what program I upload the pin 13 turns on and off 3 times and that's it. I'm checkin it by using a LED. 
Eg. if I want to use another pin (ex. 7, 8, 12) it doesn't work, or even to write a program for turning on/off 9 times pin 13 doesn't work... </p>

<p>Note: I noticed that pin 8 turns the LED for less than a 1/2 a second.</p>

<p>I already tried to restart board by bridging the reset pin and also by pushing reset directly on the board, I also reinstalled Arduino Genuino Application. I thought to update Atmega8U2 firmware but accordingly to Arduino <a href="https://www.arduino.cc/en/Hacking/DFUProgramming8U2" rel="nofollow">site</a> I don't need to update since I have firmware rev. 0.01.</p>

<p>It would be also great not to have to buy a new Arduino UNO. Thanks for your help</p>

<p>Edit:
Here is how I'm trying to make pin 12 work</p>

<pre><code>int ledPin = 12;

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

void loop()
{
    digitalWrite(ledPin, HIGH);
    delay(2000);
    digitalWrite(ledPin, LOW);
    delay(2000);
}
</code></pre>
 18770: <p>The best way to check if Arduino is working or not is to install Firmata. Here's the necessary steps:</p>

<p>1) Download Firmata application from the <a href="http://www.firmata.org/wiki/Main_Page#Firmata_Test_Program" rel="nofollow">official website</a>. </p>

<p>2) Connect Arduino to the computer</p>

<p>3) Open the Arduino IDE and burn the example Standard Firmata [File - Examples - Firmata - Standard Firmata]</p>

<p>4) Open the application, leaving the Arduino connected. </p>

<p>5) Chose the right serial port and debug every pin =D</p>
