Question about Projection Televisions

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I have a Sony KP-51HW40 projection TV and it is about 7 years old. It started have some bright yellow, almost neon yellow lines zap through it intermittently. It affects the picture for about a second and goes back to normal. Is this too expensive to get fixed?

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  • hansentoolco Mar 02, 2009

    what is "convergence"? Where would I find the part number to get this fixed? More answers needed please.

  • hansentoolco Mar 02, 2009

    Thanks so much.

  • hansentoolco Dec 03, 2010

    Hello,
    You replied to me a couple of years ago about my tv problem. I am wondering how lyou suggest that I can fix this "heat sensitive board".

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Hello,

This type of problem can be common. The Circuit board or where the components with age and heat can become lose so tapping on the side of the TV might bring it back to confirm you have this problem.

If you are a do it yourself er, you can open the back, (do not touch any of the caps with long wires going to each TV, they carry very high voltage and will jump 1/2 inch and sting you but not kill you..

With the set on, and a NON metallic piece of plastic you can gently press in the middle and outsides of each of the circuit boards and maybe see the problem come and go. Use a mirror to see the TV screen in the front so you can work from the back.
Never do this alone in case of shock.
I highly recommend you find a company that does repairs that is good with intermittent connections and can flip the bad board over and re soldier the cold or lose connectionIf you get a good picture and you like it then your 3 (electronics term). This an old school solution as the replacement board if available can cost hundreds of dollars plus the service fee.
Call around your local area and find a company that has an older repair guy with experience that says they know how to fix it in house. It might take from 1-3 hrs to fix if they can consistently make it go bad by flexing the suspect board.

Good Luck!
e

Posted on Mar 02, 2009

  • Eric  Kirkhuff
    Eric Kirkhuff Mar 03, 2009

    You have been getting some sound advice. If I am understanding that the picture comes clear then intermittently has lines in it not full screen change in color which would point to the one of the three TV tubes.

    This sounds like the cathode tubes or TV tubes are ok and it is a heat sensitive board part or cold connection.


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Hi,

It really depends on what you consider expensive. Looking at this Sony site, parts are under 300.00, but then you have to look at service rates. Normal hourly repair rates are around 70.00 to 80.00 an hour. What you are experiencing is the Projection Lamps (Bulb & Housing) dieing. This is common in Projection TV's and are some what easy to replace if you opened up the TV and located the part. The part costs $212.95 on the site I posted above.

Armymason

Posted on Mar 02, 2009

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Http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
click this link this link will guide you from how to do and with proper procedues and diagrams.  its not very costly issue but if you do not have technical knowledge then repair person is necessary at your place to do this as its worth getting it repaired . a common problem which gets repaired mostly without much heavy cost. thanks. please do rate the solution.

Posted on Mar 02, 2009

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Hi!

Try checking the tv with a dvd player or try using other cables such as hdmi and see if the yellow lines disappear.

Posted on Mar 02, 2009

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Sounds like your cathode tubes are going out.
these are the tubes that provide power to your tv projection bulbs. there are three of them and the cost about 350 dollars each. plus about 400 for some one to fix. it would be cheaper and easier for you to replace the tv.

hope this helped.
please remember to rate me.

Posted on Mar 02, 2009

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If it is one of three picture tube problem then it may cost you much and if it is some dry soldering in picture tube boards and video drive circuit then it is not costly, may be $100 plus.

Posted on Mar 02, 2009

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No its not expensive to get fixed near to $ 30 to get it fixed with parts.its the convergence problem get it fixed.

Posted on Mar 02, 2009

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