Only half of LCD display working?

Discussion in 'Embedded Systems and Microcontrollers' started by spinnaker, Mar 28, 2010.

  1. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
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    I have an LCD display commented to a PIC.

    The display has a HD44780 controller. It is a 16x2 LCD.

    Previously, it was working fine. I put the project aside for a while and recently dragged it back out.


    Now it is like the display thinks it is a 8x2 display. Only the first 8 characters display on each line. Is it possible that half of the LCD could have gone bad or should I be looking for something else?


    And not sure how to describe it but there seems to be a strange interference that is appearing on the right half of the display. It is almost like a graphic,
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
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    Check your solder joints. Flux may have traveled in storage causing a short. I cant say I have ever seen this happen myself.
     
  3. Boo

    Member

    Oct 27, 2009
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    Do you have another of the same kind of LCD lying around?
     
  4. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
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    It was bread boarded, not soldered.

    I did replace it with another LCD of the same type and that one works fine.

    So I am not sure if I have half a bad LCD or if it was simply a bad connection.

    I guess when I get some time I will hook up the original.
     
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