Hi everyone,
I have this problem, which I could not find any solution (or cause) either on the forum, nor using search engines (maybe I just cannot properly name the issue :)).
My problem is that part of the display looks like on the picture attached.
The LCD was working correctly for month or so, but this weekend I played with it and added some custom characters (lcd.createChar). Everything was working fine also after that for a day, but then I noticed that LCD was showing incorrect characters, which I have also experienced before and that's another problem (that might or might not be related to this issue). So I restarted my arduino, fixed some wiring as I also noticed that ground connector did break. So currently I am not able to see anything in right part of the LCD.
I am not sure if I short-circuited something on it, or something else happened, so maybe some of you, guys, might know what could be the cause.
I am sure that wiring is correct, I have checked it with multimeter, so every cable is going to the pin it is supposed to go to
I have also tried to use other pins on Arduino to check if those used were not damaged
because of the issue with wrong characters (related to relays on/off interference), I had implemented dummy restart of LCD (by using lcd.begin) every 30 seconds
I have this problem, which I could not find any solution (or cause) either on the forum, nor using search engines (maybe I just cannot properly name the issue).
My problem is that part of the display looks like on the picture attached.
That sort of problem has indeed shown up here before and you are probably right about the naming of the issue.
The general consensus is that there is a problem with the pressure connection between the pc board and the display itself. You may be able to make the condition change (better or worse) by applying pressure to the black bezel surrounding the LCD glass. If pressure fixes the problem then you may be able to twist the prongs on the back to tighten the connection.
That makes sense.
I had a display that started out fine and after about a month one day it looked like yours. I couldn't
find any shorts and the soldering was fine. I eventually got tired of messing with it and threw it away
and ordered a replacement. I wish I had better news but I think Don's comment about the pressure is
about as close as you're going to get to finding out the problem. If you do manage to fix it with Don's
suggestion it would be great to hear back from you regarding the fix.
Thanks for your quick responses. I have tried to play with it a little like as you suggested, but I could not really achieve the desired state for the display, so I guess I will have to order another one. I might try to mess with it later when replacement will be delivered, as for now I don't want to break it totally and for now I can live with half of the display for the purpose I need.
Thank you.
