Polytron LED TV Repaired
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.
I had to damage the warranty sticker in order to remove the screw and the cover
Below is the photo of the internal power supply/LED driver board and the mainboard.
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.
After fixing back the connector and Powered On this is what I saw- all LEDs light up.
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:
https://www.jestineyong.com/repairing-guides-by-kent/
https://www.jestineyong.com/repairing-guides-by-damon-morrow/
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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Note: You may check out his previous repair article in the below link:
https://www.jestineyong.com/no-power-in-philips-crt-tv-repaired/
(226)Dislikes
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19 Comments
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Robert Calk
October 12, 2015 at 2:05 pm
Good job, Suranga. And don't forget Mr. Yong's e-books.
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?
Andre Gopee
October 12, 2015 at 10:11 pm
Nice job done. Keep up the good work.
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...
albert
October 13, 2015 at 2:48 am
Excellent job !!
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.
Igor Levin
October 13, 2015 at 9:05 am
The real good idea is to use the torchlight for the screen performance.
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.
Henry Mayanja
October 13, 2015 at 9:31 pm
Good article Mr.Suranga, there is alot to learn.
Humberto
October 15, 2015 at 9:11 pm
Good article and good explanations. Keep up Suranga
Humberto
October 15, 2015 at 9:13 pm
And another thing I forgat: I disagree 100% with one Dislike I saw above.
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.
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.
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.
Albert van Bemmelen
October 19, 2015 at 3:45 am
Then you both probably have a form of Dyslikexia (LOL).
Robert Calk
October 19, 2015 at 4:17 pm
No, I did it on purpose to see if I could remove it.
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!).
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.
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.