I am at witts end on what is causing the error on the first 7 digit display. Second display I purchased so I don't think it is the lcd. Mobiflight, ms2020 pdgm 737 and diy737sim build. Any ideas?
I had similar issues with altitude display, worked fine for about a minute and after that it started displaying letters and other random stuff. Replaced it and works just fine, but then the heading display started doing the same thing. Haven't had time to properly look into it but i'm planning to remove the lcd grounds from rest of the daisy chain and add individual ground wires to each lcd. Not sure if that helps in this case but from my experience it could be the issue.
Do you add a resistor to each of the displays?
I had similar issues with altitude display, worked fine for about a minute and after that it started displaying letters and other random stuff. Replaced it and works just fine, but then the heading display started doing the same thing. Haven't had time to properly look into it but i'm planning to remove the lcd grounds from rest of the daisy chain and add individual ground wires to each lcd. Not sure if that helps in this case but from my experience it could be the issue.