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Rear Projection/Screen Burn

Discussion in 'Electronic Repair' started by Jon H., Jan 13, 2006.

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  1. Jon H.

    Jon H. Guest

    I have a Hitachi 51G500A which is 22 months old. It appears I have done
    some screen damage by "overpausing" with my DVR. Is there anything that
    can be done to refresh this screen (even with out of pocket costs) or is
    it a "done" deal....Thanks in advance (Pls post & Email) Jon H.
     
  2. Guest

    Three picture tubes, approximately $300 each, plus the labor to install
    them and realign everything up. Shouldn't cost more than say $1200
    total to get rid of the phosphor burns.
     
  3. Rick S.

    Rick S. Guest

    Outside of replacing the CRTs, not much can be done.

    You can try the following, which will work to one extent or another
    as long as the negative/reversed image is _exactly_ inverse of the
    burned-in image:

    1. Record a still image of the DVR pause screen with a completely
    black background.
    2. Upload the image to a computer and create an exact negative
    of it (e.g. using Irfanview, Photoshop etc).
    3. Record the negative still image back to DVD or tape.
    4. Display it on the TV continuously until the tube burns disappear.
    It might take hours, days or even weeks depending on how burned
    the tubes are, and the color/size of the image.
     
  4. JANA

    JANA Guest

    This is not reversible. You will have to have the tubes changed. This will
    be too expensive in relation to the cost of a new set. I have seen this
    before with video games used on TV sets, or when the users leave the PIP on
    all the time. Projection sets are very prone to this type of problem.

    My suggestion would be to invest in a good LCD screen. You can leave an
    image on it for a very long time, it would be nearly impossible to burn in.

    My preference is front view displays over the rear screen projection. The
    difference you see is very great.

    --

    JANA
    _____


    I have a Hitachi 51G500A which is 22 months old. It appears I have done some
    screen damage by "overpausing" with my DVR. Is there anything that can be
    done to refresh this screen (even with out of pocket costs) or is it a
    "done" deal....Thanks in advance (Pls post & Email) Jon H.
     
  5. James Sweet

    James Sweet Guest


    You can have all three CRTs replaced, that's the only way to correct
    burn. Cost is about $300 each for rebuilt tubes, plus the installation
    labor and a full alignment. Generally a set with screen burn is
    considered totaled.
     
  6. JANA

    JANA Guest

    What you are saying, in theory sounds like it will work. But, in practice,
    it will not, because it will be impossible to have the exact matched
    positioning, and characteristics. There will always be signs of burns.

    There are many professional facilities that would like to have the solution
    to screen burn problems. They would have saved a lot of costs if it was
    something that can be reliably reversed.

    --

    JANA
    _____


    Outside of replacing the CRTs, not much can be done.

    You can try the following, which will work to one extent or another
    as long as the negative/reversed image is _exactly_ inverse of the
    burned-in image:

    1. Record a still image of the DVR pause screen with a completely
    black background.
    2. Upload the image to a computer and create an exact negative
    of it (e.g. using Irfanview, Photoshop etc).
    3. Record the negative still image back to DVD or tape.
    4. Display it on the TV continuously until the tube burns disappear.
    It might take hours, days or even weeks depending on how burned
    the tubes are, and the color/size of the image.
     
  7. JANA

    JANA Guest

    I have also see a number of Plasma sets that are burned in from computer
    games and etc. When burned, the set is considered scrap, because the cost of
    replacing the display can exceed the cost of a new set.

    --

    JANA
    _____



    You can have all three CRTs replaced, that's the only way to correct
    burn. Cost is about $300 each for rebuilt tubes, plus the installation
    labor and a full alignment. Generally a set with screen burn is
    considered totaled.
     
  8. James Sweet

    James Sweet Guest


    We have a nice Fujitsu at work with some burn on it, at least it's
    fairly light. Plasma panels definitely are not repairable if they get
    burn. A really high end rear projection set can be worth fixing so long
    as it's value warrants the cost of new tubes, or you may get lucky and
    find a set of good tubes from a lightning or flood damaged set.
     
  9. CRT ones may well be. ;-)
     
  10. Andy Cuffe

    Andy Cuffe Guest

    I'm amazed at what people will pay for a badly burned plasma. I've
    noticed several go for close to $1000 on ebay even though new low end
    plasmas are less than twice the cost.
    Andy Cuffe

     
  11. Mike Berger

    Mike Berger Guest

    This will reduce the useful life of your CRT's even further.
     
  12. James Sweet

    James Sweet Guest


    While I wouldn't expect it to accomplish much, if the CRTs have serious
    burn then their useful life is already over anyway.
     
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