The opening in my radio case is rather tight for the display. So I had to press quite a bit to get it in.
After several repetitions of builing it in and getting it out now the display suddenly only shows some black squares on the right side of the second line.
I never thought about it but: How sensitive are those dispays? Are they easy to break?
Bevor I will build in the replacement, I certainly will make the opening a little wider
Through experience i have found lcd's to be quite robust, maybe opening and closing the lid has dislodged a wire inside your box?
if and lcd is damaged or the glass is cracked you will normally see black marks on the screen even when the power is off
I've broken one of these before, and I saw what I'd describe as a puddle of black "ink" in the fractured area. Quite demoralising really. On the bright side they are (as complex components go) pretty cheap and simple to interface with. I haven't used many but I tend to keep a spare one around for situations such as this.
It didn't take much force to damage it, when I broke mine I think it was from a blunt (but fairly mild) impact on the front glass. Twisting through the long axis would very probably break the screen too, but this is a lot less likely unless you're mounting it in a flimsy enclosure.
Swap it out and solder in a new one and good luck with your project. It looks pretty awesome, I have to say!
If the LCD didn't crack, then maybe the conducting rubber is disledged. Look at the following diagram
You can use a small screw driver to straighten the rubber. That helps a little. If not, you can risk taking off the display panel from the circuit board, re-place the rubber to the right place, then tighten the glass panel back on.
Good for you. Say, what tool did you use to cut the LCD window? I have a similar project in mind that needs a wooden box. I could get some tips from you
Normal procedure for cutting clean rectangles into wood is to drill a large hole well inside the perimeter of the rectangle and inserting a coping saw blade to cut the rough shape out, then you sand / file it down to perfect the shape.
because the other day when I was opening my radio suddenly the lcd got very hot.
And now on one row from left to right it does not show any black parts of characters any more.
That means that the first of the two lines is hard to read now.
I suppose I had a short circuit between two pins for a short time ...
Can someone tell me which pins of the lcd may never ever get in contact ....
Or has the kind of 10k trim-pot that I use an influence?
In short, no pins want to touch no other pins. But to find problems, open the box and snap a few photos. We'll take a look. Maybe it was the spaghetti monster
Did you not have a current-limiting resistor on the LCD back light LCD? That's what could have heated up your display. When heated up, the liquid crystals will boil into liquid and permanently lose their alignment and the display will degrade. You'll have to show your monster so we can troubleshoot!
