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Flickering Colored Snow On Plasma TV

Discussion in 'Electronic Repair' started by [email protected], Apr 6, 2007.

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  1. Guest

    I have an LG Plasma TV and for the past four months I have had a
    problem with colored "snow" flickering over the picture on my TV.

    Here are a couple pictures I managed to take of the problem:

    http://img187.imageshack.us/img187/9947/dscf1273rs7.jpg
    http://img187.imageshack.us/img187/9675/dscf1274qs3.jpg
    http://img187.imageshack.us/img187/6694/dscf1275dj0.jpg

    I don't think it's cord related because it happens when I am watching
    cable via component cables and a DVD through HDMI.

    Any ideas on what could be wrong if it is the unit itself? I just
    passed the one year mark with the TV last month and like I've said
    this has been happening for quite some time, so I'm hoping something
    didn't fail on me already.
     
  2. Guest

    I also should add that this is not something that happens all the
    while the TV is on. It comes and goes. Also, if I shut the TV off for
    a decent amount of time (20 minutes or so) and then put it back on the
    snow is gone.
     
  3. Looks like aging panel problems we've seen in my shop.


    Mark Z.
     
  4. Dave

    Dave Guest

    if it comes and goes, could it be a dry joint problem ?
     
  5. Likely a problem with HDCP compatibility. Try hooking up via component and
    if it clears up this is the problem. Could be a bad HDMI receiver IC or
    something screwy in the communication between devices. You can also try
    cycling inputs on the set.


    Leonard
     
  6. Andy Cuffe

    Andy Cuffe Guest


    I was just in a store that had a bunch of LG plasma displays playing
    ads. I saw one or two with the same colored snow problem, so it has
    to be a problem with the set. If it's still under warranty, you
    should get it looked at as soon as possible.
    Andy Cuffe

     
  7. ampdoc

    ampdoc Guest

    How old is the set? This looks very much like an aging issue. As the panel
    gets older it gets more difficult to reset each individual cell in the
    panel. Thus sometimes the sustain voltage, x and y drive voltages may be out
    of range for the panel, and have to be reset. You can adjust it out
    temporarily by tweaking the vSus and X/Y drive voltage, but if the panel's 5
    or so years old and has been used heavily, it's probably just EOL.

    Jammy
     
  8. James Sweet

    James Sweet Guest


    Sounds like an internal fault in the TV, you should have had it looked
    at when the problem first occurred and it was under warranty rather than
    continuing to use it.
     
  9. Guest

    I just passed the one year mark last month. I was just looking through
    the manual and I see the warranty is two years, fortunately, so I may
    need to call and get it serviced.
     
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