floresta:
Your photographs are not very helpful because there is no single picture where I can trace the wires between your Arduino and your LCD module.I do not trust those video download links so I have not seen the videos.
From what I can see in the '9gvimd' picture you have not interpreted the pins correctly. Pin 1 is near the outside edge of the PC board and pin 16 is near the center.
Don
Sorry, i thought they were more understandable, i will try to do better photos.
As you see in the photo '2vdqwj9' i've powered pin 1-2 with two wire above the board, external are gnd and internal are +5 volt, the third pin from right is for contrast(pin3), next are rs(pin4), mass(pin5), enable(pin6), 4 unused pin(pin7-10), and db4(pin11), db5(pin12), db6(pin13), db7(pin14), they go to arduino in, rs (arduino pin 7 ), e (arduino pin 8 ), from arduino pin 9-12 are db4-db7. If i had not power them i shouldn't see "black" squares when i power arduino.
Videos are uploaded on videoweed, it's a streaming video site, just click on bottom left 'symbol play' in the video window, not in center like youtube. If you want i can upload it on another site that you tell me.
takao21106:
tin solder is notorious bad with these row headers.Do you have any other display?
Have you tried to use it in 8bit mode + measured all signals directly on the LCD (if anything arrives at all)?
I don't have any other displays, and as i said i check all wires form lcd to arduino with an ohmeter, so signal should arrive.
justone:
After you load the sketch hit the reset button and see what happens. On my Uno (r2) if I have any of the lcd pins hooked up to either pin 3 or 7 then it will not run. It will work if I move to any of the other pins. The new Uno(r3) has fixed this by building a better reset circuit.
Nothing, i can try to move pin 7 to pin 6, i'll say you what happen. But i don't think this is the problem, because in the guide he use an arduino duemilanove, and i've an arduino diecimila.
I'm going angry with this lcd.