LCD problems

[Fernecho]

hi,

I have problems with my HxC LCD rev C, can not see the screen messages correctly,

Moreover the HxC works well, only that display problem

Here I leave some pictures:

http://www.subirimagenes.com/fondosycap ... 88672.html

http://www.subirimagenes.com/fondosycap ... 88684.html

http://www.subirimagenes.com/fondosycap ... 88687.html

[Jeff]

A LCD replacement is needed here. Try to contact Lotharek for this.

[Fernecho]

Ok, thank you very much for your response, I will contact with Lotharek.

[cube1us]

I have this same issue - the display works for a while, and then shows a row of dark characters on top, and spaces below. I will contact Lotharek as well.

[Jeff]

I have this same issue - the display works for a while, and then shows a row of dark characters on top, and spaces below. I will contact Lotharek as well.

Your problem is a grounding issue : Place a tape between the LCD ribbon and the metal case, this shouldn't happen anymore.
Anyway once the emulator case is properly installed into the computer, this doesn't happen.

[cube1us]

I don't think the ribbon cable is really an issue - the ribbon cable is insulated. However, I can see why some might think that. At one point I found that the ribbon cable connection to the board was touchy - removing it and reinserting it helped. So it may be that some who did as you say ended up disturbing the connector a bit which caused the display to start working again.

In addition, I got a not from Lotharek (who just loves these displays - NOT) who indicated that the bezel (held on the back by tabs that are bent over) is important. In working on that I saw just how important - it actually presses the liquid crystal part of the assembly into the contacts, and if it is loose, strange things happen. And if it slides a little bit sideways, as it did on me for a while, the display can vary from corrupted characters to blank.

Finally, while those metal tabs are painted, they also go right over some holes in the circuit board for the display (called "vias") and I slipped a piece of paper between the tabs and the board as well.

In any event, mine seems to be stable now, and if it becomes a problem again, I have ideas on how to get it working properly.