Question Why does tv turn on and work, then later picture goes off?

Discussion in 'General TV Discussions Forum' started by skateboardkid, Apr 30, 2016.

  1. skateboardkid

    skateboardkid
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    A 22 inch Samsung television experienced a storm yesterday, we both survived but I lost picture. First off, I am glad to be on this forum, an audio engineer from Texas Instruments told me about this site many years ago.

    When the set is first turned on I have a full picture, and sound. The picture then begins to go in and out for a few moments. Then the picture becomes black, but the sound continues to work fine. The menu items will shift back and fourth a bit when accessing them. This problem is consistant on all inputs. The lightning hit real close to my home, I could see the flash and the thunder came at the the same time.

    Like I said we survived, just need a little help taking care of the bugs. This is a wonderful forum, and as an audio video guy, I have directed customers here for various reasons. Can I get some help with my own television, was hoping I could do the research, and fix it myself if you all agreed. Is it the power supply? I thought if it was the power supply then the tv would not turn on all. All the pixels work on the screen. Is it that the picture requires more power than the audio, and a weak damaged power supply is working the set, and sound but just not the picture. Even that sounds off, and this is why I am here asking for your help.
     
  2. skateboardkid

    skateboardkid
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    I don't know why I picked the name "skateboardkid", I have not ridden a skateboard since I was eight years old. I guess I was distracted with my television when coming to this forum and picking out a name.

    I really enjoy being around electronics, I first got stated by having a spook house in my bedroom after me and a friend went to radio shack and bought all these lights and switches and hid behind my bed so we could put on a show for the other kids our age.

    Funny thing was is all the neighbors heard about this story and brought over their broken toasters and speakers to me. I didn't fix anything, but I did take it all apart and got to see what was inside and this is how I got hooked on electronics.

    So i am having fun being here with you guys today.
     
  3. JayCee

    JayCee
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    You'd be better off asking at www.avsforum.com as the one you've posted at (this one) is UK-based.
    We have different models compared to your side of the pond.
    When you post give the TV's model number which you'll find on it's rear label.
     
  4. skateboardkid

    skateboardkid
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    I forgot to give the model number UN24H4500AFXZA when I posted my question. And if I unplug the tv and plug it in again, it does exactly the same things I mentioned at first. I have picture for a brief moment, then the picture comes on and off during the next few moments, then during the remaining time the picture is off completely with just sound. I left the set turned on for a few hours and it is running like before with sound and no picture. If I unplug the power, the picture goes away again after a minute. I am baffled, and would really like some advice. The tv is less than a year old, and lightning hit here last night. The lighting was s close I thought it hit my home directly, I could see the flash, and the thunder was extremely loud.
     
  5. skateboardkid

    skateboardkid
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    Hello JayCee

    I didn't realize I was talking with people from the UK. I guess it is universal no matter where you live that a television going out is not any fun. If anyone has any idea, I really welcome your help.
     
  6. skateboardkid

    skateboardkid
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    Jaycee, I tried to use the forum in the USA, but it wants me to wait activation even after activating using the email from them. Maybe you guys can help me here, thanks again.
     
  7. JayCee

    JayCee
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    You state the TV is less than a year old...can't you make a claim on your house insurance?
     
  8. skateboardkid

    skateboardkid
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    I would rather enjoy fixing the set, as opposed to replacing it. I noticed now there is a new development, the set now stays on for a longer period of time. Furthermore, the screen gives a full picture and sound, but flashes off and on. At times the picture still goes out but unlike before the pictures comes back on it's own. The whole time there is sound just as in before. Is this a bad power supply?
     
  9. skateboardkid

    skateboardkid
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    After a few days of watching my television "trying to work", I notice it flashes a full picture, then to a black screen; and does this for a longer period now, but after about ten minutes the screen goes black and you just here the sound. Even then, the screen will at times come back on and do the same as described above. I am familiar with circuit boards, and their components; and felt I should first ask what others thought. Is it that some the capacitors need replacing, or should I replace the power supply. before replacing anything, couldn't we check the voltage with a tester on the other side of the circuit. I thought the best thing was simply ask others to get some ideas, can you let me know on this forum what you guys think.
     
  10. JayCee

    JayCee
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    I'm sorry if you thought I was being rude, I don't mean to be, I have been assisting users of this forum with various AV problems since 2004 after a lifetime of repairing TV's and other AV equipment.
    I give out the best advice I can for their particular situation and in your case you've stated you'd like to repair your faulty Tv yourself even though it's still under warranty (something you haven't commented on by the way)...this is always a bad idea and will invalidate it.

    No one on here can possibly tell you what's wrong with or how to repair your Tv or any of your neighbours TV's. You cannot learn how to do so from a few posts on this or any other forum, it requires years of study and practical application.

    Your Tv hasn't suffered a normal breakdown, you've had a lightning strike in your vicinity and high voltages are momentarily induced via the power, antenna (and ethernet if it's a smart Tv) connections leading to component breakdown in just about every area of the electronic circuits...you go and source a replacement power supply board, fit it, then discover you still have the same symptoms so you then source a replacement main board...(these are expensive for an under 1 year old Tv) and fit it and that doesn't cure it either so that leaves one thing, the panel itself so before you know it what you've spent would have bought you a brand new Tv...do you see where I'm coming from?

    To troubleshoot Tv faults a circuit diagram (known as a schematic on your side of the pond) is required for that particular brand/model, a multimeter and possibly other expensive test equipment, also a hot-air soldering station and the most important requirement is the knowledge of how circuits work and how to use this equipment to troubleshoot it ...modern TV's aren't designed to be repaired to component level these days and are hard enough for an experienced professional doing it day to day for a living far less an amateur tinkering around.

    As you've stated, your Tv is less than 1 year old, once again, my advice is to get it repaired under warranty.
     
    Last edited: May 1, 2016
  11. skateboardkid

    skateboardkid
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    Jaycee, You now have learned that I am poor, and not just tinkering around for enjoyment. I stated in my introduction to this problem that as a kid neighbors would bring their broken items and I just liked to explore and open them up. It is always better to not try to size people up, you will usually come out short.

    I appreciate the information you shared after the fact, that shows you are a stand up guy, one who sticks around even when there is a problem with communicating to others. Thank you for that.

    I have been in the field of construction, mechanics, medicine, and for the past 20 years in electronics; but not as a bench technician. i understand you have a wealth of knowledge where I do not, but sometimes this can actually be a weakness when trying to accomplish things. I came here with a good attitude, wanting to have fun while discovering and meeting new people, especially abroad. It was disappointed not because of the information you provided but how you presented it to another. Hence, you were not going to help me because of me just tinkering you thought, then once you found out the truth about me you then say it is not worth fixing. Why did you just not say that it was not worth fixing in the first place?

    It is not what you know so much that matters, it is how you see the world around you. Being a specialist can and often is their greatest weakness. I just wanted to know what the probability was that it may be the power supply after providing others with the symptoms of my electrocuted tv set. I had a feeling this would not be good news, on the other hand it sure would be nice if it was a simple fix and I could save my money. Which is what you wanted to do here at first, was help another so it does more than just help fix a set it helps a person out during difficult times. I am very glad you posted again on this forum and not run off. Talking with people helps me learn new things and things about myself. Often ourselves is what needs the most learning and I am trying to get that. It looks like you are too!

    I won't search anywhere else, because I trust you. I am going to buy another set, and save some by not getting a smart tv because this trailer park's wireless internet would be counter productive with the smart features. I found one at Samsung's site for 149.00, the old set I paid 229 but it had smart features.

    I have a question for you about the warranty. When I worked at an electronic retailer many years back, the warranty did not cover lightning. Should I call up Samsung? It would be nice to have the set fixed instead of wasting the money I spent on it. Thank you again Jacee, I would like to also apologize to you, this was a really bad storm here and I may have been on edge some because of that.
     
  12. logiciel

    logiciel
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    It's very simple - return the TV to the supplier and get a new one, free.
     

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