Between pin1 and pin2 there are 5.01VDC.
I check the continuity with a tester on all the connections and they are all ok.
Unfortunately, i tried to take a photo about the wiring but it is not clear since there are too many wires.
Pins 6 and 7 are ok.
Wires are very short, about 10 centimeters and they do not have reconnections or breaks: they directly go to the atmel microcontroller.
I'm using a perfboards, so all the wire are soldered.
However, i tried to connect and re-connect the display to my arduino several times and all the time connections are ok but there are strange characters on the display.
The most important thing is that when I run the diagnostic sketch, I'm able to see the triangle which is under all the strange characters and the black pixel lines.
As you can see in the previous photos, sometimes the correct characters are in background since strange characters and black lines are foreground.