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Arduino 16x2 LCD Shield

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I recently purchased a arduino 16x2 lcd display. I hooked it up to my PCDuino and tried testing it via the LCD4Bit.h example code loaded with it. The output was only a black upper line and a blank lower line. I tried powering it via an iPad charger and had the same results. I've tried recompiling the code and the same effect. I also tried simplifying the code using the library and also had no luck. I'm by no means an expert at this, but after correctly compiling code designed for this specific set up is failing me I feel like it may be a hardware issue, not a software/user issue. Any advice would be appreciated. 

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