Polytron LED TV Repaired

By on October 12, 2015



polytron led tv repair

 

 

 

 

 

 

 

repair polytron led tv

 

The complaint of this Polytron LED TV was no picture and no light but there was sound. When I used a torch light to shine at the panel, i could see dim picture.

This means the power supply, mainboard and even the panel are working fine. The problem is in the LED driver board or problem with the LED backlights.

led tv repairing

 

I had to damage the warranty sticker in order to remove the screw and the cover

open tv cover

 

Below is the photo of the internal power supply/LED driver board and the mainboard.

led tv repaired

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Since there was a correct output voltage from the connector (36.8vdc) this means the problem is in the LED backlights. I had to gently remove the internal casing/cover in order to check on the LED backlights. Remember to take picture or record how you dismantle the panel part as fixing it back is not a straight forward job.

led tv panel

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baiki led tv

After fixing back the connector and Powered On this is what I saw- all LEDs light up.

baikpulih led tv

 

So I fixed back everything and the LED TV came back to life. If you want to learn how to repair LED Tvs you can check out Kent and Damons’ ebooks:

http://www.jestineyong.com/repairing-guides-by-kent/

http://www.jestineyong.com/repairing-guides-by-damon-morrow/

kursus membaiki led tv

 

suranga

 

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

Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.

P.S-  If you enjoyed reading this, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!

Note: You may check out his previous repair article in the below link:

http://www.jestineyong.com/no-power-in-philips-crt-tv-repaired/

 

 

Likes(224)Dislikes(2)





19 Comments

  1. Robert Calk

    October 12, 2015 at 2:05 pm

    Good job, Suranga. And don't forget Mr. Yong's e-books.

    Likes(8)Dislikes(4)
  2. Litec

    October 12, 2015 at 8:04 pm

    Nice job!
    But how this problem can create?? Its placed pretty deepin the set..
    Is that from an hit on the panel itself?

    Likes(1)Dislikes(0)
  3. Andre Gopee

    October 12, 2015 at 10:11 pm

    Nice job done. Keep up the good work.

    Likes(3)Dislikes(0)
  4. Chris

    October 12, 2015 at 10:30 pm

    Hi!
    Simple explained with simple but helpful pictures.
    Keep up with articles.
    Good job done Suranga.
    I hate when somebody press the "Dislikes" button without explanation...

    Likes(3)Dislikes(0)
  5. albert

    October 13, 2015 at 2:48 am

    Excellent job !!

    Likes(0)Dislikes(0)
  6. Amir Mukhtar

    October 13, 2015 at 3:35 am

    Dear Mr. Suranga
    the article was too good and Informative. Thanks you
    Keep Sharing your Expertise. Also, Blessings goes to Sir, Jestine yong.

    Thanks you All
    A Student of Electronics
    Amir Mukhtar AShrafi
    Karachi. Pakistan.

    Likes(0)Dislikes(0)
  7. Igor Levin

    October 13, 2015 at 9:05 am

    The real good idea is to use the torchlight for the screen performance.

    Likes(0)Dislikes(0)
  8. Albert van Bemmelen

    October 13, 2015 at 4:17 pm

    Nice work Mr.Suranga. I noticed that this TV works from 180 to 240 VAC, 50 and 60Hz? 110/120 VAC 60Hz would be more useful. Are there countries that use 180 VAC at their Power Lines? Just wondering.

    Likes(3)Dislikes(0)
  9. Henry Mayanja

    October 13, 2015 at 9:31 pm

    Good article Mr.Suranga, there is alot to learn.

    Likes(0)Dislikes(0)
  10. Humberto

    October 15, 2015 at 9:11 pm

    Good article and good explanations. Keep up Suranga

    Likes(0)Dislikes(0)
  11. Humberto

    October 15, 2015 at 9:13 pm

    And another thing I forgat: I disagree 100% with one Dislike I saw above.

    Likes(2)Dislikes(0)
    • Albert van Bemmelen

      October 18, 2015 at 2:04 am

      Hi Humberto, I totally agree. Any idiot can press that dislike button without telling why. But that person better have a very good reason! Even more for pressing it twice!! Cheers.

      Likes(0)Dislikes(0)
  12. Corriete

    October 16, 2015 at 10:39 pm

    good article. i'm sorry for the mistake of pressing the dislike button above. can that be corrected to like. thanks great job.

    Likes(2)Dislikes(0)
    • Robert Calk

      October 18, 2015 at 6:41 pm

      I clicked on dislike a minute ago and couldn't find a way to remove it either.

      Likes(0)Dislikes(1)
    • Albert van Bemmelen

      October 19, 2015 at 3:45 am

      Then you both probably have a form of Dyslikexia (LOL).

      Likes(0)Dislikes(0)
      • Robert Calk

        October 19, 2015 at 4:17 pm

        No, I did it on purpose to see if I could remove it.

        Likes(2)Dislikes(1)
        • Albert van Bemmelen

          October 20, 2015 at 4:57 am

          O yes, that is a good one! You better try that on the Like Button Robert (Haha!).

          Likes(0)Dislikes(0)
  13. jhun

    May 20, 2016 at 10:06 am

    Sir, i have the same problem with my Polytron LED TV with model pld32d905, when i open the unit and after a few seconds the video becomes shadowy and pausing continously, what seems to be the problem sir? TY and good day sir.

    Likes(0)Dislikes(0)
  14. Jhun

    May 20, 2016 at 11:51 am

    Sir, i have a Polytron 32" LED TV with same video problem, but mine is when i open the unit and after a few seconds the video becomes shadowy and pausing continuously, the audio is working fine. What seems top be the problem with my TV? Thanks sir and good day.

    Likes(0)Dislikes(0)

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