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Dell P991 Trinitron Shadow Problem

Discussion in 'Electronic Repair' started by Charlie Pyne, Apr 18, 2004.

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  1. Charlie Pyne

    Charlie Pyne Guest

    Hi,

    I have 3 year old Dell P991 Trinitron 18" monitor that recently started
    having a problem with shadows around dark text on white backgrounds.. While
    I'm typing this, there are gray bands that go through each line of text and
    extend the either side of the monitor. If I highlight the text with the
    mouse cursor, the band that I'm highlighting gradually gets darker. Does
    anyone have any suggestions on how to fix this? Is it worth fixing?

    Thanks
    Charlie
     
  2. Jerry G.

    Jerry G. Guest

    This is usually a sign that the CRT is going weak. To properly verify this,
    the biases to the CRT have to be checked, and the drive signals to the CRT
    have to verified with a scope using the proper test video.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    Hi,

    I have 3 year old Dell P991 Trinitron 18" monitor that recently started
    having a problem with shadows around dark text on white backgrounds.. While
    I'm typing this, there are gray bands that go through each line of text and
    extend the either side of the monitor. If I highlight the text with the
    mouse cursor, the band that I'm highlighting gradually gets darker. Does
    anyone have any suggestions on how to fix this? Is it worth fixing?

    Thanks
    Charlie
     
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