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LCD display on EST2 Fire Alarm Panel only display black boxs ... how to fix

Discussion in 'General Electronics Discussion' started by cesarm507, Dec 8, 2016.

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  1. cesarm507

    cesarm507

    1
    0
    Dec 8, 2016
    hello guys so my est2 display went crazy now I cant read any troubles.... only thing I see is 2 line fill with black boxes. so I said to my self screen is bad let me buy a new one..... got another one from eBay and the same thing. can anyone help me out here. how can I get this thing back o normal. what is wrong with the system...
     
  2. davenn

    davenn Moderator

    13,782
    1,934
    Sep 5, 2009
    hi there
    welcome

    I suspect you will have to contact the manufacturer for help
     
  3. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    This is what that type LCD display does if it does not get the initialization code. I suspect that the problem is not with the display, but with whatever is trying to communicate with it.

    Edited to add: Actually it can also look that way if the contrast setting is too high. Is there a contrast adjustment?

    Bob
     
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