Just hooked up Adafruit RGB Positive 16x2 LCD+Keypad Kit to my PI, everything works fine, no issues. Just one thing seems to be irritating, whenever I re-plug in the power, the first row of the LCD comes up in black boxes while PI is booting, at this point no code is loaded. When I run the python program, the boxes will disappear, text display as expected. I adjusted the potentiometer so that text contrast is high, I think this causes the boxes to show up when powering up. I can also adjust the contrast to low so that I will never see the boxes but then text is near invisible.
Any insight is appreciated.
Adafruit 16x2 LCD black boxes on first row
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- adafruit_support_bill
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Re: Adafruit 16x2 LCD black boxes on first row
This is normal behavior. When the LCD first powers up, it displays the boxes until you tell it to display something else. So until your Pi is up & running, the boxes will be there. As you discovered, these are slightly less intense than the normal text display and you can fine tune the contrast to minimize them.
Please be positive and constructive with your questions and comments.