How To Solve No Power Problem In Haier LCD LED TV Repair

By on March 4, 2016
haier LED TV repair

 

 

 

 

 

 

 

haier led tv repair

The complaint of this 24 inch Haier LED LCD TV was no power. When i checked on the main fuse, it was tested good. I continued to check on the big main filter capacitor and there was 313 VDC. This means the capacitor and the circuit before the capacitor were good.

If there is an open circuit track or one of the components along the circuit is open circuit, then there will be no voltage measured at the main capacitor.

haier led tv repairing

 

haier lcd tv repairing

Checking on the secondary side output voltages had proven the problem is in the power supply circuit. The cause of the problem can be in the primary or secondary side.

haier lcd tv repair

I have decided to check on some of the major components in the primary side such as the power FET, start up resistor, optoisolator IC and etc but all were checked to be good. Even the secondary output diodes were checked to be good too.

check power fet

Now left only the biggest suspect which is the power IC OB5269CP as seen in the below photo:

6

 

I had to remove it in order to replace with a new IC. It was a simple job and the job done in less than 10 minutes.

power ic problem

ob5269cp ic

Below photo is the new IC that I had replaced.

ob5269cp power ic

 

Once the power was applied take a look at the result below:

haier led tv repair

 

Conclusion- I believe if you know how to test components then you can start the repair job. Bear in mind all the safety guidelines as electricity can kill. By the way Kent had just launched his new Ebook on LCD LED SCREEN repair. You can check on his product by clicking on the link below:

kent led tv repair

suranga

 

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:

http://www.jestineyong.com/lg-dvd-player-repair/

 

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19 Comments

  1. Albert van Bemmelen

    March 4, 2016 at 2:13 pm

    Professional as always! Thanks.

    Likes(5)Dislikes(0)
  2. Yogesh Panchal

    March 4, 2016 at 3:10 pm

    Suranga,

    Excellent Job! from where did you arranged that IC ?.

    Likes(1)Dislikes(0)
    • Suranga Electronics

      March 4, 2016 at 6:10 pm

      Hi Yogesh,

      I bought the IC from Ebay.

      Suranga

      Likes(2)Dislikes(1)
  3. Parasuraman S

    March 4, 2016 at 11:13 pm

    You work like an easy magician or juggler when handling electronic appliances! Highly professional, I have to say!

    Likes(2)Dislikes(0)
  4. Humberto

    March 5, 2016 at 1:20 am

    Good repair Suranga. Keep sharing all your experiences with us.

    Likes(2)Dislikes(0)
  5. Robert Calk

    March 5, 2016 at 3:14 am

    Thanks, Suranga. FYI, "bear" means the big animal that hibernates in the winter, "bare" is the word that should be used in the article. Good job on the repair.

    Likes(2)Dislikes(1)
  6. Anthony

    March 5, 2016 at 3:54 am

    Great repair and terrific photos Suranga ! Thanks for sharing

    Likes(1)Dislikes(0)
  7. Gerald

    March 5, 2016 at 8:28 am

    Nice article and pictures, straight to the point. Thanks for sharing Suranga.

    Cheers,
    Gerald

    Likes(2)Dislikes(0)
  8. Chris

    March 5, 2016 at 6:20 pm

    Hi!
    Congrats for the successful repair.
    Well explained and excellent photos.
    Keep up.
    My best regards.

    Likes(0)Dislikes(0)
  9. Suranga Electronics

    March 5, 2016 at 7:28 pm

    Thanks for all the comments.

    Suranga

    Likes(3)Dislikes(0)
  10. petr

    March 10, 2016 at 2:44 pm

    Thanks a lot Suranga. Very good photos and explenation, I still have a problem with repair power supplay, but i keep going to forword. Thanks again.

    Likes(0)Dislikes(0)
  11. Luciano

    March 15, 2016 at 4:46 am

    Suranga,
    Thanks for sharing the faultfinding tips. Success in your repair works.

    Luciano

    Likes(0)Dislikes(0)
  12. Anthony Cacciottolo

    May 11, 2016 at 3:24 am

    Thanks for your excellent video, but I would like to know how you determined that the power IC was bad. Was it because it was the only component left to test? Did you make any voltage/resistance tests before unsoldering it?
    Thanks and please upload such excellent explanations as this.

    Likes(0)Dislikes(0)
  13. Richard

    July 25, 2016 at 2:06 pm

    Nice pictures and good explanation straight to the point just love it

    Likes(0)Dislikes(0)
  14. ronald zablon

    July 30, 2016 at 8:34 pm

    job well done

    Likes(0)Dislikes(0)
  15. harpreet

    November 3, 2016 at 4:24 pm

    My haier led have power but they cannot on what is this problem

    Likes(0)Dislikes(0)
  16. Oneray

    December 31, 2016 at 3:32 am

    My Haier LED TV goes off and comes on and off and on when turned on. I don't know what might have caused the problem, but it makes some tiny noise after switching on and the moment the screen begins to lighten up, it goes off and powers on again like that order until i put it off outright. I will appreciate any help. Thank you

    Likes(0)Dislikes(0)
  17. saman dolawatta

    January 16, 2017 at 10:01 pm

    Dear Suranga,
    Thanks for sharing the wonderful tech tips.
    Good luck & Success in your repair works.
    hop to meet soon in SriLanka

    Likes(0)Dislikes(0)
  18. leonardo picazo

    February 15, 2017 at 7:51 am

    sir what is the supply of rgb transistor of tv

    Likes(0)Dislikes(0)

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