Not sure if this is the problem with the LCD or the atmega. First the SCL and SDA lines are HIGH when LCD is not connected after booting. After connecting the LCD and i run the LCD diagnostic sketch the lines read HIGH but with the LCD connected and the atmega booting, SCL reads LOW.
I checked for continuity on the SCL and SDA lines and they turned out to be ok. I don't see any short to ground or VCC.
Appreciate if anyone could help.
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Interface Board.pdf (20.6 KB)