Question about Hitachi Televison & Video

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Low color spot on screen

It's a bluish spot about the size of a dinner plate. Shows mainly on a dark background.

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  • p.yoder Nov 11, 2008

    It's a faded color spot. Shows blue on a dark background and yellow on a light background. Kind of a U shape.

  • p.yoder Nov 11, 2008

    How can I get this fixed?

  • p.yoder Nov 11, 2008

    Nice to have way to get answers. Does my fee cover anymore quetions I might have or is it just for each new question?

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4 Answers

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  • Master
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I think you need to replace optical block .

Posted on Nov 11, 2008

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  • Master
  • 6,966 Answers

Hi,

In some versions/models, this could just be a dirty/dusty lens/tube. Perhaps it may be more clear if you could post back the brand and model number or better still the chassis number.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 11, 2008

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  • Expert
  • 196 Answers

Its the problem of the ics on the main board.either the ic is loose or getting faulty.as it will increase further.you can check out the board and do the replacement if needed.

Posted on Nov 11, 2008

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  • mmechanics Nov 11, 2008

    The main problem behind these color spots on your TV is the speakers you have sitting next to it. Any stereo speakers should be at least 14 inches from the television and any surge protectors should also be hidden from the TV for it also causes the same effects. But don't go buy a new TV, there's an easy way to fix this.

    Step2If you notice a color spot as soon as you set a speaker next to your television, carefully pull it away in the exact same motion and degree. Sometimes doing this still leaves the color spot but it will lesson it. The same things can happen to your computer monitor; thankfully they make the computer speakers unable to damage the monitor and if they do there is a degauss button in the monitors menu that rids it for you. Some people, like those who work in offices like to hang pictures on the sides of there computer towers (CPU), using magnets. If your having huge unfixable problems with your computer its because of these magnets. Magnets like to eat the information and software right out of your computer; first contact is always permanent damage.

    Step3That color spot on your TV screen can me removed by putting the opposite polarity of the magnet back up against your TV; opposite of with the polarity when it was damaged. Be sure to does this in the spot were it happened originally on the side of the TV (not in front) or it will cause more color spots.

    Step4Don't have a magnet but have a small battery charged drill? Switch the drill to drive (if on right side of TV) & reverse (if on left side) then place it next to the damage on the screen and start drilling. As you drill pull it straight away and repeat as necessary.



  • mmechanics Nov 11, 2008

    Then the color spot is probably from magnetization.  

    The screen must be degaussed either by its own built-in degaussing coil or at a shop where they have an external degaussing coil.  The charge for doing it is nominal.

    BUT: If the degaussing coil in the set is working normally the spot will dissapear over time. Each time the set is turned on the degaussing coil is activated.  You can accelerate the removal of the spot by repeatedly turning the set ON and OFF. The set must remain ON for one or two minutes each time while the coil produces its degaussing field.

    Let me know if you need more.



  • mmechanics Nov 11, 2008

    feel free for further queries on this issue.
    thanks for the appreciation.
    thanks

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  • Hitachi Master
  • 19,396 Answers

This can be caused by a bad coloer wheel , a problem in the light tunnel, or a polarization prtoblem if it is a rear projection LCD model.

Posted on Nov 11, 2008

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  • Ginko
    Ginko Nov 11, 2008

    Leave the set unplugged for 24 hours. If when you turn TV on the spot is not there , and comes back after a while, then it is the anti-polarizing screen.

    If the spot is static and it is always there, then it can be a problem with the display.

    If the spot is like a round shadow right at the center of the display, then it can be the color wheel.

    A detached mirror inside the light tunnel can also cause a similar shadow.


    It will be useful getting the model number to know if this can also be an LCD fault, in case the TV is rear projection LCD.


  • Ginko
    Ginko Nov 11, 2008

    Sounds like a defective color wheel.

    Shadows from problems in the light tunnel do not change colors, and polarization spots change in shape and size.

    The technician should access to the color wheel, located behind the lamp, inspect it and eventually replace it.

    A good idea could be calling the phone number listed on the owner manual and ask the cost for a warranty extension, that will cover the repair in full.

    I also report my previous comment for better clarity:

    Leave the set unplugged for 24 hours. If when you turn TV on the spot
    is not there , and comes back after a while, then it is the
    anti-polarizing screen.

    If the spot is static and it is always there, then it can be a problem with the display.

    If the spot is like a round shadow right at the center of the display, then it can be the color wheel.

    A detached mirror inside the light tunnel can also cause a similar shadow.


    It will be useful getting the model number to know if this can also be an LCD fault, in case the TV is rear projection LCD.

  • Ginko
    Ginko Nov 11, 2008

    Use this Mail
    Inquiry Form
    to contact hitachi.

    Ask them the cost of an eventual repair, or better of a warranty extension.


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