Having the contrast wired wrong is the reason you see the black squares.
Having the contrast going to 5+ is wrong. Sometimes going to (-) will work but the best bet is to use a pot like the manual and Al said. Then it is adjustable.
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Having the contrast wired wrong is the reason you see the black squares.
Having the contrast going to 5+ is wrong. Sometimes going to (-) will work but the best bet is to use a pot like the manual and Al said. Then it is adjustable.
Dave
Always wear safety glasses while programming.
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