Connected it to my Arduino Uno R3. Backlight did not come on. Did a bit of simple troubleshooting and found the ground from the i2c / SPI character LCD backpack to pin 16 on the LCD reads open. I pulled the ground wire from the i2c / SPI character LCD backpack. I jumped ground from the Arduino direct to pin 16 backlight came on. What can I do? Is my i2c / SPI character LCD backpack bad?
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