MEGA 2560 Avrdude pb !

Development Tools IDE 1.x
1

Hi there,
is there anyone who can help me with the message I get.
I bought a brand new Mega 2560.

I'm under windows 7 pro 64.
Everything is working fine with my Arduino UNO.

But, when I try to upload even the blink sketch this is what I got :

avrdude: verification error, first mismatch at byte 0x03e7
0x60 != 0x40
avrdude: verification error; content mismatch

I tryed to reset but nothing changed,

  • led 13 on
  • led 17 on

Is it already dead ?

2

The stange thing is
when I upload this basic code, I don't have any error message :

void setup() {
}
void loop() {
}

Since that moment,
I tried to upload a blink test like this, it's working perfect
but I still have an error message :

avrdude: verification error, first mismatch at byte 0x05e7
0x77 != 0x57
avrdude: verification error; content mismatch

int led = 13;

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

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);  
  delay(1000);              
  digitalWrite(led, LOW);   
  delay(100);               
  digitalWrite(led, HIGH);  
  delay(100);               
  digitalWrite(led, LOW);   
  delay(100);               
}
3

Ok I tryed another computer and it's still the same.
My other arduino (uno) works perfect.
But the with the Mega 2560 I still have avrdude error message,
but it is working, the led is blinking.
I'll try to upload an much more complicate sketch than the simple blink test
to see if it's realy working

Do you think it could be the bootloader ?