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Blue Haze - not cool

Discussion in 'Electronic Repair' started by [email protected], Mar 9, 2007.

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  1. Guest

    Hello all,

    I have a set that has a constant blue tint in the picture. When
    lowering the 'color' setting I'm not getting a black and white picture
    - the blue tint is still there.

    The menu does show a yellowish green color (mostly yellow) so I know I
    have blue and green colors. Furthermore, while looking at the screen
    closely I can see the red phosphorus glowing a little (and I have a
    red line moving down the screen). RGB is there... Ruling out the
    color channel is over excited (for a lack of words..)?

    I have a new TV already, but I would like to figure out what is wrong
    with this one - I have a score too settle with it :). Any leads or
    pointers in what to check or test would be appreciated.


  2. colin

    colin Guest

    Red and green make yellow dont they ?
    sounds like the gain of the blue channel is low, its to weak on bright
    colours leaving them yellowish, and too bright on dim colours leaving them
    usualy IME its high value high voltage resistors wich change their value
    with age in the anode circuitry and cuase colour changes.
    particularly variable resistors. not to mention build up of dust grunge etc
    on those parts too. trying to adjust colour settings can be quite time
    consuming especially without a colour pattern generator.

    Colin =^.^=
  3. James Sweet

    James Sweet Guest

    It would sure be helpful if you posted some details on the set, ideally
    the brand and model number but at least let us know what type (direct
    view, projection, CRT, LCD, etc) this is.
  4. Guest

    The set is a GE XS Model # 20GT374. It is a CRT display.

    It's been a long time since I've used this set; from what I can
    the blue tint would appear - and after turning the tv off for a little
    it would operate normally after that - perhaps a heat related

    Collin: Yep, red and green make yellow.... :) I had worked all

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