I am working with a JHD539M1 16x4 character LCD and have wired it as such.
I have not connected the backlight since that messes up my camera shot, but as you can see the contrast is on full. But it remains that way at every position of the pot. I have checked and the pin 3 is changing voltage from 0 to 5v easily as i change the position of the pot. But for every position the 2nd and 4th lines remain black.
BTW, I am using this tutorial http://learn.adafruit.com/character-lcds/wiring-a-character-lcd
. It says not to go forward without getting the pot to work, hence the question.
(sorry for the lack of colors, will upload new pic in an hour)