Question about Sony Grand WEGA KF50XBR800 50" Rear Projection HDTV-Ready Television

1 Answer

KF50XBR800 Rear projection LCD TV on and then standby

Turns on, picture is fine. After 2 minutes shuts off and goes to standby. After another 1-2 minutes goes back on. Cycle repeats indefinately until I try to turn off TV then I get a series of 5 blinks on standby light which repeats and finally turns off

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  • Anonymous Mar 30, 2014

    my sony rear projection lcd tv, when I turn it on it works fine then it will shut down and when this happens my standby light blinks green. then it will turn back on on its own and it keeps repeating the process. please help

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From how long you have this problem? and what made it start?
do u remember the cause?

Posted on Dec 28, 2007

  • 2 more comments 
  • dewan nafees ahmed Dec 28, 2007

    most likely just a bulb failure...How many hours on the set? You should be up and running again when you install the new bulb.

    Check your owner's manual about the flashing light code. It may tell you some more about what's wrong

    the lamp replacement works most of cases.
    so that is your best solution.




  • dewan nafees ahmed Dec 28, 2007

    You have a bad lamp or the lamp circuit, called the ballast circuit is
    bad. If you have no solid state repair experience, contact a pro to
    assist you in this repair. This is not a set you need to replace a
    simple board on.

    If you have solid state repair experience here is the explanation for you.
    Five blinks - AKB circuit (automatic kine bias), the
    timer/standby indicator blinks for about 30 seconds then goes to the
    self-diagnosis function. Something is wrong with the video. Check video
    out, Q705, 732, 761 and other components on the C board, also check
    Q218, 219, 220 on the A board. In addition, unit could be in IK
    blanking, try turning up screen slightly.


  • dewan nafees ahmed Dec 28, 2007

    http://www.techlore.com/article/15444/Un...

    save this page and keep. it will help you in future.
    this has all explanation for blinking codes.

    but i thinnk they will be found on ur manual also i think

  • dewan nafees ahmed Dec 28, 2007

    http://www.user-manuals.com/advanced_sea...

    if u dont have a manual do download it and have one for you. even tough it costs a little, it will be useful for you for a very long time.

    thank u. that was my whole reply.
    tel me what works

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Kf-50xbr800 turns off for about 30 seconds, standby lights blinks 34 times before coming back on. stays on for 2 minutes then repeats cycle...


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Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
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Lamp replacement procedure is easy and written in user manual.
Please buy Sony original lamp for good picture in tv.
Thanks.


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Blessings,
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Hey there, from what you are telling me I think the problem is coming from your Power Supply board it sounds like it could be two things

one: the board might have gone bad and its not sending the corresponding voltage to your components and that is why it keeps turning off

example: works ok for a while then gets weak truns off and then gathers enough turn back on

two: the power supply could be over heating and it has a sencor when it gets to hot to turn off this is very rear though

please rate this solution !!!

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