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16x2 LCD Keypad Shield for Arduino

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Hi there, I have recently purchased a 16x2 LCD Keypad Shield for Arduino and following the "minimal example" from:
http://linksprite.com/wiki/index.php5?title=16_X_2_LCD_Keypad_Shield_for_Arduino#Pin_definition_and_Rating

I am unable to get anything to display on the unit. When powered by USB or DC supply, I have the RED LED and top line pixel filled display, but the shiled does not respond to any examples I have, including the "minimal example" from the link above.

Are there any tests I can perform to confirm a faulity unit?

Thanks in advance...

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Did you remove the 1602 LCD shield before uploading the code to your Arudino?

 

And did you try to press the Reset button on the shield to see if the LCD shield can display something?

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