I have just bougth a Uno R3 and a LCD display (ATM2004D, compatibel with HD44780). The Uno board runs perfectly, but I can not get the LCD working.
I have been testing the LCD example and connected the LCD according to: http://arduino.cc/en/uploads/Tutorial/LCD_bb.png
but the display is all black. I have checked the connection several times, but there is no sign of life in the display.
Shouldn't I at least see that some LCD "light up" as power is applied or as I turn the potentiometer to control the contrast?
I start suspecting that the LCD is broken, does anyone have some good idea to test that?
The UNO board is supplied by USB