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LCD only shows 1 row of white blocks - Displays - Arduino Forum

16x2 LCD only showing white squares - Displays - Arduino Forum

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Why won't the 3rd line of my 4x20 LCD work? It just puts whatever I want on the second line, even though I moved the cursor using my Arduino. - Quora

LCD Screen has only one row of Solid Blocks?? - Displays - Arduino Forum

16x2 LCD only showing white squares - Displays - Arduino Forum

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