I recently got an Arduino LCD screen. I tried connecting it to the UNO with the 10k potentiometer and all the needed equipment but all I got were white rectangles instead of characters. I have uploaded the hello world code but I saw no changes.

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  • 2
    Looks like you may have the contrast set (or wired) wrong. – Majenko Feb 12 '17 at 23:16
  • Or you have drawn white rectangles to the screen. – Code Gorilla Feb 13 '17 at 12:46

As @Majenko already mentioned, you have to set the right contrast. Use potentiometer to find out what value suits you right.

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