Question about Samsung LN-T4665F 46 in. LCD Television

3 Answers

Can hear sound perfect but no picture just stripes I'm having the same problem and have noticed a couple of the capacitors partially blown, the 2200 micro farad caps to be exact. Are these the only ones that should be replaced or should all of them go? Also, would you recommend replacing them with a higher temperature life capacitor? I would LOVE to fix this problem permanently by improving the design but I don't want to save a capacitor and lose a house due to a fire caused by my T.V. lol. Thanks a lot for the info.

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  • vincentdeo Feb 24, 2009

    Thank you. The reply was really fast. I'm glad I'm going in the right direction. I'm just a little confused with what and where the STK Ics are. If you can please elaborate I'd appreciate it. Thanks again.

  • vincentdeo Feb 26, 2009

    Thanks for all the advise so far. Right now I'm ready to start replacing capacitors, I just need to ask a crucial question. The existing 2200micro farad capacitors are 10V 105degrees. The only ones I could find at Radio Shack were 35V 85degrees. Would it be safe to proceed or do I need to be exact on the voltage and temp rating? If so, any suggestions on where I can find these components? Thanks.

  • Sibananda Jena
    Sibananda Jena May 11, 2010

    This is a common problem with this model. There are some bad capacitors
    in the power supply. This is the the feed voltage for the signal board.
    Just replacing those capacitor will fix your unit


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3 Answers

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

If your concern is on a Samsung LNT4665F 46′ LCD HDTV, then no display could be:

  • inverter (most likely);
  • power supply (likely);
  • lamp/inverter controller (least likely);
  • CCF (cold cathode florescent) lamps (still a possibility but unlikely).
Since apparently you would be performing a DIY (do-it-yourself) component level repair, rather than board replacement, it would be to your advantage that:
  • replace all the capacitors with the same ratings specs in the same area. They most likely share the same manufacturing batch, the same working conditions and therefore would share more or less the same failure rate;
  • your idea of a higher temp rating would be toyour added advantage;
  • be reminded of polarity of the legs;
  • explore the idea of adding a blower fan similar to those used in desktop computers.
Good luck and thank you for using FixYa.

Posted on Feb 24, 2009

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  • Master
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If like to replace the capacitors go for the solid capacitors which are used
in today's motherboards has they have 6 times life span compared to the
electrolytic capacitors used. Try to use these capacitor rather than going for high value which will create unwanted results on the TV...

Good luck...

Posted on Feb 24, 2009

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  • Master
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Hi

The problem is with the covergence circuit goin bad. You need to replace the STK Ics as wwell as the 2200 micro farad caps.

Posted on Feb 24, 2009

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  • Rylee Smith
    Rylee Smith Feb 24, 2009

    Before replacing any components on your Samsung try using HDMI Cable and then see is it makes any diffrence. Also, try and reset it by locating a small reset hole button on back side.

    Use a pen tip to depress if you can locate it.

  • Rylee Smith
    Rylee Smith Feb 24, 2009

    And, if still found it the same way then--




    1. First remove the switch mode power transformer.

    2. Also, make sure you discharge the filter capacitor first before checking on others components. After the filter capacitor voltage already discharged , I used **** smith flyback tester to measure across the primary winding of the switch mode power transformer to see if there are any short circuit occurred.


    3. Replace the 2200 microfarad(would be of 25 volt rating) electrolytic capacitor in the primary side.


    4. A shorted power ic (this monitor is using the 4 pins 5L0365R power ic) in the primary section or a shorted diode in the secondary section would pull down the flyback tester LED bar to the minimum.


    5. Also check main board and inverter board.


    6. Also, check the the fuse (3amp). As, this capacitor(Burnt 220 microfarad capacitor) was located at the same line with the fuse.


    7. Also, check A6J (PNP digital transistor) and the A8J (NPN digital transistor placed near to the fuse.

    Please ask for further clarifications.



    Thanks

    Rylee

  • Rylee Smith
    Rylee Smith Feb 27, 2009

    No, don't replace the 2200micro farad cap.s with 35v, 85 degree rating as they will burn out when you will switch on the tv.

    It wouldn't be safe to proceed. You can buy these capacitors from this link---



    Capacitor 2200 microfarad



    Capacitors 2200 microfarad 10v,105c



    Please ask for further clarifications.



    Thanks

    Rylee

  • Rylee Smith
    Rylee Smith Feb 27, 2009

    Also, see this link for buying the capacitors--



    Link 3, 2200 microfarad cap.s

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