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.

Posted by on

  • 1 more comment 
  • 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


×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • 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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 2,035 Answers

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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 8,619 Answers

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

  • 2 more comments 
  • 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

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Sanyo Flat screen TV is dead. No sound and pictures


Could be the power supply board. If there are no lights at all This may be the issue. For about 50-75 bucks you should be able to
buy a new one. If you are handy and can solder is is most likely
blown capacitor "caps". Very cheap fix a couple of bucks, but be careful a capacitor disharge could knock you on your can or in a really bad situation kill. Not kidding. First always look for a reset button or blown fuse.

Nov 23, 2014 | Sanyo Flat Panel Televisions

1 Answer

I have a JVC 42x579 TV. The TV does not turn on... i hear a click with the Relays but no screen image at all... not even the JVC POST screen... The Power light does not flash, it stays solid the whole...


hi austen yes i know what the problem here is. i am quite sure its the capacitors in the tv. they are realy easy to find and to change your self. a blown capacitor will be easy to notice it will have a risen dome like appearence on the top of it, there'll be lots of these capacitors in the back .so just look for the ones that arnt perfectly flat. and then solder the old ones out and replace by soldering the new ones in. just make real sure the new ones go in the way they came out .....good luck ian

Sep 09, 2013 | JVC LT-42X579 42 in. LCD TV

1 Answer

My Coby 32'' LCD TV comes on but no picture.


Hi Chris,
Sounds like a popped capacitor......if you look inside again, try looking to see if any of the Capacitors are blown...

2_14_2013_2_16_08_am.jpg


2_14_2013_2_16_28_am.jpg

Jan 29, 2013 | Flat Panel Televisions

2 Answers

Ive been using my ps3 on my lg 42'' lcd tv for 3 yrs now perfectly then this past few when playing a game i keep getting lots of lines distorting my picture after about 5mins of that it goes b


Sounds like a blown capacitor on your board to me. Its a common problem in Samsung TV's and is typically an easy fix, but I think in the LG's its a bit more expense and not as easy as swapping out a Capacitor. I think the main board may have to be replaced there. What actually happens is the capacitor bursts at the top and oozes liquid that solidifies, its caused when the capacitor that is used is underrated for the application (basically some engineer's solution to making us have to buy a new tv in 3-4 years, a slightly underrated capacitor will have a shelf life of use, kind of like a timer, they all do it belive me) eventually the set will not rendure any picture at all and the board will have to be replaced.

Mar 01, 2012 | LG 42LG30 42 in. LCD HDTV

1 Answer

I have a Vizio VO74L TV almost 3 years old. Last night it popped and the screen went black and lost sound. It turns on and you can hear it click but still no sound and a dead screen. Opened it up and...


If the capacitors have blown then it would not cost much to change them all, Capacitors in LCD tv's are a common faulty due to poor chemical compounds used to make them and heat exhaustion, especially with the tvs that have the same chassis. Try changing them all and see if it makes any difference. Vizio or other manufacturers wont say anything as its not under warranty and they dont like people looking inside their tvs :).

Mar 22, 2011 | Vizio VO47L 47 in. LCD TV

2 Answers

Lg 37lc7d with no picture or sound but green light comes on . popping noise preceeded problem. no obvious blown capacitors


Ur tuner board is dead.Replaced this board to get picture back.Tries Shopjimmy.com,Ebay.com for the board part.

Feb 10, 2010 | LG 37LC7D 37 in. LCD HDTV

1 Answer

Can hear sound perfect but no picture just stripes


Hello dod2470,
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
92ca23a.jpg
b956670.jpg

Dec 11, 2008 | Samsung LN-T4665F 46 in. LCD Television

13 Answers

Will not turn on or off


I had the same problem. I work for a mother board manufacturer w/offices in New Jersey and brought mine into our engineering lab after Samsung told me tough luck. Anyway, one of my engineers fixed it in 10 minutes. Essentially, he replaced the 1000uF capacitors on the power supply board with 2 cent capacitors instead of the 1 cent capacitors that had blown out on the CHEAP SAMSUNG POWER SUPPLY BOARD. You can tell the caps are blown via visual inspection. The top of the cap should be perfectly flat and a blown cap will be convex on top. Unfortunately, there are also 2500 uF caps by the same cheap manufacturer on the board as well and we don\'t stock that value for our products. According to my engineer, those will most likely blow next since he replaced the others with better caps, but I\'m getting samples of those and will replace them shortly. After that this piece of junk should last me at least another 2 yrs! It\'s been working for about a week now w/no problems. Hope this helps.

Dec 05, 2008 | Samsung LN-S4051D 40 in. LCD Television

2 Answers

Power swith ic went bang!


unfortunately these boards are now obsolete, it may have damaged the bridge rectifier

Nov 06, 2007 | Samsung PS42P2S 42 in. Plasma Television

Not finding what you are looking for?
Samsung LN-T4665F 46 in. LCD Television Logo

158 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Flat Panel Televisions Experts

xxxxxx xxx

Level 3 Expert

4706 Answers

Steve McIntosh

Level 1 Expert

11 Answers

Boo to u

Level 1 Expert

28 Answers

Are you a Samsung Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...