LED TV T-Con Board Problem

By on October 6, 2017
display fault in led tv repair

 

 

 

 

 

 

 

 

 

 

display problem in LED TV

how to fix led tv

This 32″ Videocon LED TV came in with the complaint of many color vertical lines across the screen. Take a look at the two photos above. This kind of problem can be caused by bad LCD panel or faulty T-con board. In order to confirm that the LCD panel is not the cause of the problem you can actually press on the menu button.




If the OSD menu appeared then you know the problem is not in the LCD panel and T-con board is the cause. From my testing, the faulty part was the T-con board. I took out the T-con board for visual inspection and  found that one of the LVDS connector area had ant’s nest-see the second photo below:

led tv tcon board repair

how to repair led tv

What I had done was to clean the board with a brush and sprayed at the connectors with a contact cleaner. Next I reflowed the ICs with a SMD rework station.

fixing led tv

The T-con board now is clean and I had to hook it up to check if The TV will get back to normal.

how to repair and fix led tv tcon board

After putting everything back and powered it On, the problem still remained the same-see the photo below:

videocon led tv repair

This means the problem is either due to bad components, Improper DC supply or signals and etc where I need to troubleshoot and find it out. Initial testing of basic components and DC supply voltage were found to be good.




My guess was that one of the main T-con board ICs could have problem. The problem now is that my customer need this TV back urgently and I got no choice other than to buy a new T-con board from Ebay and fixed it-see the photo below:

NEW LED T-CON BOARD

Once the new board is replaced, the problem was gone and this had proved it was indeed the T-con board was the main culprit. If more time is given to me, I will perform an in-depth checking on this faulty board. I will first target the Main T-con board IC.

videocon led tv fix

Conclusion- All customer are different. Some are very demanding, some friendly and some don’t bother to take back their equipment even if the equipment is already been repaired. If you have run this kind of repair business for sometimes I’m sure you would be understood what I’m saying. All the best!

suranga

 

This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.




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Note: You may check out his previous post in the below links:

http://jestineyong.com/shorted-bu3150bf-and-open-resistors-in-philips-dvd-mini-player/

 

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19 Comments

  1. Randy Warren

    October 6, 2017 at 9:57 am

    "and some don’t bother to take back their equipment even if the equipment is already been repaired", so true! That is why I never repair a piece that I can't sell the piece on ebay or wherever to recoup all my costs on!

    Likes(4)Dislikes(0)
  2. Albert van Bemmelen

    October 6, 2017 at 2:40 pm

    Thanks for this interesting T-Con repair Suranga. I only wonder how you are able to buy a new T-con board from Ebay so quickly if the problem is that the customer needs his TV back urgently? Normally it at least takes a week or 2 before the ordered items arrive.

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    • suranga Electronics

      October 6, 2017 at 6:44 pm

      Hi, Mr,Albert.

      Yes you are correct. I have bought this T-CON Board from online market about one year ago. I had been working for the last few years as a sub service agent for this brand of LED TVs. There were many over warranty tvs' with various display faults.

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    • Suranga Electronics

      October 7, 2017 at 12:34 am

      Thanks Mr,Albert .

      Likes(3)Dislikes(0)
  3. Yogesh Panchal

    October 6, 2017 at 3:01 pm

    Good job! Suranga

    Likes(3)Dislikes(0)
    • Suranga Electronics

      October 7, 2017 at 12:35 am

      Thanks Mr.yogesh

      Likes(1)Dislikes(0)
  4. Claudemir.siqueira

    October 6, 2017 at 5:46 pm

    Muito bom.obrigado pela dica

    ---------------------------
    Very good.Thank you for the tip.

    Likes(2)Dislikes(0)
  5. Waleed Rishmawi

    October 6, 2017 at 7:54 pm

    i have an LG tv with similar problem but I can not see the menu therefore it is the bad panel. the customer does not want to be fixed. thanks for sharing.

    Likes(2)Dislikes(0)
    • Calum

      October 10, 2017 at 9:31 am

      check 12v regulator ic

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  6. Steve

    October 6, 2017 at 8:02 pm

    Great repair article very informative as always.

    Steve

    USA

    Likes(1)Dislikes(0)
  7. Justice

    October 6, 2017 at 9:16 pm

    T-con board and OSD mmmm, I'm still a long way to fully understand, but tnx for your wonderfull expirience.

    Likes(1)Dislikes(0)
  8. mahmoud_tajpour

    October 7, 2017 at 4:08 am

    Hi dear Bandara this repair was very very useful for me because I have two TV these are similar fault now I can repair these TVs thank you very much and hope you are happy and healthy.

    Likes(1)Dislikes(1)
    • Suranga Electronics

      October 8, 2017 at 1:09 am

      You are Welcome

      Thanks.

      Likes(0)Dislikes(0)
  9. Parasuraman

    October 8, 2017 at 2:47 pm

    Excellent! How I wish I could be in your neighborhood so that I can learn many things from you!

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    • suranag Electronics

      October 9, 2017 at 4:02 pm

      ok. Mr Parasuman,
      Thank you !

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  10. Robert Calk

    October 8, 2017 at 4:21 pm

    Good job, Suranga. It would be interesting to know if the bad IC on that T-Con board had adhesive underneath it, like the ones that I always see, that would pull the top layer of the PCB off with it when you try to remove it.

    Likes(1)Dislikes(0)
    • suranga Electronics

      October 9, 2017 at 4:10 pm

      Hi. Mr Robert Calk,
      Thanks.
      yes Some time May be that.

      Likes(0)Dislikes(0)
  11. Ali

    October 10, 2017 at 8:05 am

    Great job brother man.I have the same problem with 32inch sansui, but mine differs slightly.It switches on well i can see pictures, but after some few minutes it show the same image you have just shown us (vertical lines), at this moment all buttons are not functioning.aim puzzled.Wish for advise on where to check.Thank you.

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  12. Tito

    October 12, 2017 at 6:40 pm

    Good job Suranga, but what if the tv is showing one vertical line, should the problem point to the t-con board also? Any help?

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