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LCD Monitor problem - pixel over saturated in pictures where colors change

Discussion in 'Electronic Repair' started by Bob F, Feb 27, 2010.

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  1. Bob F

    Bob F Guest

    I have an old Sony LCD SDM-S81 that worked fine for me for a couple weeks after
    I got it used. Today, I found it displaying pictures badly, distorting the
    colors by seemingly greatly exagerating the intensity of colors in areas with
    changing shades of colors (Photos and Video, mostly). Additionally, the colors
    seem to flicker, as if the problem alternates at a high rate.

    Can anyone give me any advance clues as to what to look for when I open it up?

    It is the monitor. Plugging in my old CRT shows no suck problem.

    Thanks.
     
  2. N_Cook

    N_Cook Guest

    Sell it to a dance/night club ?
     
  3. Bob F

    Bob F Guest

    Looks like an intermittant problem. Today it's working.

    Bad solder joint?
     
  4. Bad solder joint?

    That would certainly be the first thing to check.

    Is the problem on all colors, or just one?
     
  5. Bob F

    Bob F Guest

    First thing I saw was orange areas around faces, but also distortion on blue
    areas, like a picture of an alpine lake. So probably all colors.
     
  6. First thing I saw was orange areas around faces...

    Do you mean there's smearing or "blooming"?
     
  7. Bob F

    Bob F Guest

    I don't know the proper term I guess.

    On faces, there were irregular bright orange areas on faces, mostly near the
    edges.

    The lake picture had bright blue areas scattered of the darker blue surface,
    along with exagerated colors on some of the surrounding mountains and
    vegetation.

    It showed things OK as far as I could tell on windows like outlook express where
    colors were solid with sharp edges. Other windows with "solid" colors that fade
    slightly from one shade to another would have exagerated colors in parts of
    those shaded areas.

    I tried taking some pictures. I'll see if I can find a place to post them.
     
  8. Bob F

    Bob F Guest

    And now it's not working right. It seems to flip-flop maybe once a day.
     
  9. Bob F

    Bob F Guest

    FWIW. I finally got around to opening the monitor. I unplugged and replugged the
    internal connectors, and tried it again. It seems, so far, to be working fine
    now. Maybe I got lucky.
     
  10. FWIW. I finally got around to opening the monitor.
    Obviously, the problem was caused by oxidized connections. Did you use a
    cleaning agent, such as DeOxit, before reattaching the connectors? This
    might keep the problem from recurring.
     
  11. Bob F

    Bob F Guest


    I didn't, but will if the problem re-occurs. Thanks.
     
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