Question about Sony BRAVIA KDL-52XBR4 LCD TV

1 Answer

Hello,we bought our first sony bravia KDL-46V4100 LCD in 2007. This TV recently started having horizontal lines with double images at start up, after about 15 minutes the problem goes away. At first all I had to do was put my hands on the top at each corner and twist gently and the problem went away instantly. Now you have to wait for the TV to fix itself . Once the problem goes away the picture is perfect. Please Advise on possible solution. Thank you

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  • 6 more comments 
  • deerspotter Nov 10, 2010

    yes we have the skills ,tools ,and more than likely we have access to the parts well need to replace.please advise. deerspotter

  • deerspotter Nov 25, 2010

    hey sai its deerspotter im back.finally got a chance to work on the tv..took the back off and found a mylar cap 1of 3 in close proximity to each other .it has a white substance leaking from 2 places.. # reads 105 k 450 under that has m on one side c on other.all other caps and boards look clean no discoloration or burn marks this is on central board.tv is a 46 lcd bravia 2007 .has no center metal plate over board.

  • deerspotter Nov 25, 2010

    thanks man .im havin ahard time finding that cap . im in phx az 85023 .tried frys electronics no luck ,any sugestions

  • deerspotter Nov 25, 2010

    i dont know .i think maybe i will try to send you the pics at imageshack

  • deerspotter Nov 27, 2010

    hey sai.thx for your paitience .im not really sure what the real problem is but check this out.i have the back off of the tv currently ,and everything connected and powered up .the tv was off for 8 hours and normally when i turned on the unit i had the horizontal lines and double or ghost images i had to wait for 15 to 20 for everything to clear up.well since the back is off the unit has less rigidity and as soon as i turn on the tv all i have to do is put my hands on the corners and lightly push with one while pulling with the other instantly clearing the picture up .less than 10 sec from power up to a perfect picture .and tv was off for 8 hours i have repeated.this method successfully 4 two days now.what do you think .i have checked any connections that may be affected by the twist .you have any ideas.

  • deerspotter Nov 27, 2010

    its deerspotter sai with that last post

  • deerspotter Nov 27, 2010

    http://yfrog.com/j2pb240695j thx for the help

  • deerspotter Nov 28, 2010

    yes i can. tell me where to shoot, or tell me the number of the picture of pictures..I run c n c s in a big manufacturing plant that makes machines and equipment for checking , changing.ect of quartz crystals.im pretty sure i can get our circuit board lady to swap some caps once we locate
    the offenders.thanks again for your time.

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  • 4,889 Answers

The problem going away after a while indicates that you are just another victim of capacitor plague, on the main audio video board. There are cylindrical components known as capacitors on the board which rapidly charge and discharge. If they are faulty then, it would take longer than usual to reach the optimum capacitance value. Replacing these things requires prior experience in working on PCBs, especially soldering. If you have these skills let me know and I will help you fix this. Otherwise just get me your zipcode and I will get you a list of techs in your area.

Sai.

Posted on Nov 10, 2010

  • 5 more comments 
  • eagle338
    eagle338 Nov 10, 2010

    Ok. First up, you are gonna have to remove the back cover and take off the metal plate at the center that is over the main board. Look for faulty capacitors(they usually bulge or crack at the top if they are bad). Take a close look to identify them. Even a tiny hole at the top means it needs to be replaced. If you can get me the images of the main board and the power supply board(just to be sure that the problem is not related to multiple boards) I can identify the faulty ones for you. Just upload the images to imageshack.us and get me the links

    Sai.

  • eagle338
    eagle338 Nov 25, 2010

    Leaky capacitors = Bad capacitors. I would first replace that and see if the problem disappears.

  • eagle338
    eagle338 Nov 25, 2010

    What are the specs? uF/mF Voltage, Temp rating?

  • eagle338
    eagle338 Nov 25, 2010

    Ok. That will do

  • eagle338
    eagle338 Nov 27, 2010

    This is definitely capacitor failure. What about the pics?

  • eagle338
    eagle338 Nov 28, 2010

    Ok I se about 5 to 6 bad capacitors(surface mount). But not sure as the glare can be misleading. I also see some specs written on top of them but cannot see any thing. Can you get me a more higher resolution images so that I can have a look? Or we can just get a service manual nd get the specs from it.

  • eagle338
    eagle338 Nov 29, 2010

    Just had another look at the board and I found a component totally friend and it looks like solid state. I am afraid you are gonna have to replaced. See the lower half of the image. I have rounded it up, and posted a commenthttp://img573.imageshack.us/img573/6075/...

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