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
    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
    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


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

    Thread Starter AAC Fanatic!

    Oct 29, 2009
    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.