Power Problem In Hitachi 32″ LCD TV Solved

By on August 19, 2013



hitachi lcd tv repair

label

lcdtvmainboard

tconboard

A 32” Hitachi LCD TV came in with the complaint of can’t power on. The power LED blinks few times and stayed red. This seems to be the power supply problem. After the removal of the big back cover with tons of screws finally I could see few circuit boards. The first thing I looked at was the power board to see if there are any bulged e-caps.  Just under the big heatsink I saw two bulged e-caps.

powerboard lcdtv

bulgedecaps

In order to remove the bad e-caps one need to remove the heatsink first. After removed the bad e-caps I proceeded to check on the other e-caps and found one to be marginal and I replaced that e-cap too. Total replacement of 3 e-caps put the TV back to service.

heatsink

ecaps

hitachi lcd tv

Conclusion-There are always simple and tough problems in electronics equipment.  Don’t always assume that it is very difficult to repair electronics equipment. One got to open the set up and check on it. If you did not open it up you would not know the answer.  Even if it is tough to repair then take it as a lesson for you to learn. The more tough problems that you have repaired the better knowledge you will have on that equipment.  If you are new to LCD TV repair and would like to know more about LCD TV internal boards you can click on the below link:

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http://www.electronicrepairguide.com/lcd-tv-repair-basic.html

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jestineyongtestingcomponents

 

 

 

 

 

Jestine Yong

Please give a support by clicking  on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments. By the way if you have any good repair article that you want me to publish in this blog please do contact me HERE.

lcdtvrepairbykentliew

 

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59 Comments

  1. Ivor

    August 19, 2013 at 11:23 pm

    why did you remove the heatsink and diodes and not just the heat sink?

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 20, 2013 at 7:04 am

      Hi Ivor,

      Because the diodes is attached to the heatsink secured by screws. This means soldering out only the heatsink legs would not be able to pull it out unless you also need to solder out the diodes legs.

      Jestine

      Likes(1)Dislikes(0)
  2. Kumar

    August 19, 2013 at 11:25 pm

    Fantastic articles

    Likes(0)Dislikes(0)
  3. Ruben

    August 20, 2013 at 4:06 am

    Hi, I have a problem with a LCD tv brand Sanyo 24XH8 having the sides of the screen a thin vertical lines, I could help me find the failure? thank you.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 20, 2013 at 7:05 am

      Hi Ruben,

      If the OSD menu affected as well then the problem could be a bad LCD panel otherwise check on the LVDS cable and the T-con board.

      Jestine

      Likes(1)Dislikes(0)
  4. Amir Mukhtar

    August 20, 2013 at 4:51 am

    Sir,

    Thanks you for sharing such a nice tips and Knowledge.
    God Bless you.

    yours Student
    Amir Mukhtar Ashrafi

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 20, 2013 at 7:03 am

      Hi Amir,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  5. Alex Lee

    August 20, 2013 at 1:23 pm

    The usual CrapXon capacitors again. And the Samxon didn't fare very well either. Seen plenty of them over the years, including those in LCD monitors also. The proximity of the heatsink to the capacitors especially the top area makes it worse, as heat can cause faster degradation of these (already crappy) capacitors.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 20, 2013 at 5:12 pm

      Hi Alex,

      You are right about this.

      Jestine

      Likes(0)Dislikes(0)
  6. Waleed Rishmawi

    August 20, 2013 at 3:39 pm

    nice article. I just love this kind of repair. thanks for sharing

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 20, 2013 at 5:11 pm

      HI Waleed,

      You are welcome.

      Jestine

      Likes(0)Dislikes(0)
  7. hafeez

    August 20, 2013 at 3:40 pm

    Thank you sir for this artical

    Likes(0)Dislikes(0)
  8. reza

    August 20, 2013 at 9:58 pm

    hello mr yong
    tank for share this articl

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 21, 2013 at 9:05 am

      Hi Reza,

      You are welcome.

      Jestine

      Likes(0)Dislikes(0)
      • David

        February 7, 2014 at 12:21 am

        Thanks sir for sharing this with us. It's Nice I Love it.THANKS.

        Likes(0)Dislikes(0)
        • Jestine Yong

          February 7, 2014 at 10:28 am

          HI David,

          You are welcome!

          Jestine

          Likes(0)Dislikes(0)
  9. Tom Dunaj

    August 21, 2013 at 12:25 am

    Justine I sure enjoy reading the repairs and tips.
    Even though I am unable to do repairs anymore I have parkinsons
    and memory problems it sparks my interest I will always look forward
    to reading your articles.

    Thank You,Justine.
    Tom

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 21, 2013 at 9:05 am

      You are welcome Tom-take care.

      jesine

      Likes(0)Dislikes(0)
  10. Tyrone.

    August 21, 2013 at 12:56 am

    Thank you Jestine for this repair tip,and God bless you.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 21, 2013 at 9:05 am

      Hi Tyrone,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  11. Ner

    August 21, 2013 at 2:30 pm

    I learned a lot from your tips, Keep up the good work.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 21, 2013 at 8:34 pm

      HI Ner,

      Thanks.

      Jestine

      Likes(0)Dislikes(0)
  12. Clarence Hinkson

    August 21, 2013 at 9:25 pm

    Jestine your repair tips along with an e-book I purchased from you some time ago has helped me to repair an Olevia 42inch tv that had a similar problem to what is described in this article. I replaced all seven electrolytic capacitors on the power supply board that had some bulging and tested below their ratings. It now powers on again and is working fine. Keep up the good work.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 21, 2013 at 9:30 pm

      HI Clarence,

      Congratulation! Thanks for the support on my ebook.

      Jestine

      Likes(0)Dislikes(0)
  13. anjan

    August 22, 2013 at 1:23 pm

    Hi, i am from Nepal i am electronic technician i have a problem about Samsung LCD Moniter is no power . i check everything is ok, but i cant get power .that make me to much expensive. so how can i solved this problem .please tell me a right suggestion . the model no is 720N [R]X - model code LS17MJVKB/XSS

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 22, 2013 at 9:44 pm

      HI Anjan,

      What have you checked and replaced? And dc voltage at the power ic pin? Have you checked all the secondary output diodes?

      Jestine

      Likes(0)Dislikes(0)
  14. shah

    August 23, 2013 at 4:28 pm

    Hi
    Sir,
    Thank you for good tips

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 23, 2013 at 9:12 pm

      H Shah,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  15. Roki

    August 24, 2013 at 12:30 pm

    Hi Jestine, did you replace the E-caps with the same kind or change to a higher voltage rating type? Change all to 50V perhaps?

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 24, 2013 at 11:34 pm

      HI Roki,

      I replaced with the same e-caps.

      Jestine

      Likes(0)Dislikes(0)
  16. Ngo Vinh Phu

    August 28, 2013 at 12:23 am

    Thank You Very Good You! Jestine Yong

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 28, 2013 at 9:01 am

      Hi Ngo,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  17. Tesfaye kebede

    August 30, 2013 at 7:23 am

    THANK YOU JEDTINE IT IS A HELPFUL REPAIR TIPS

    Likes(0)Dislikes(0)
  18. jasunil

    August 31, 2013 at 12:46 pm

    your lessons are find sir,and please give me data pdf for ta7322p IC, this for Akai amplifire

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 2, 2013 at 10:21 am

      Hi Jasunil,

      Just go into google and type in the part number follow by datasheet.

      Jestine

      Likes(0)Dislikes(0)
  19. Luis

    September 4, 2013 at 8:47 am

    very well thank you very much

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 4, 2013 at 10:28 am

      Hi Luis,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  20. isagani cuaresma

    September 8, 2013 at 7:49 am

    thanks for sharing sir jestine. god bless

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 8, 2013 at 4:42 pm

      Hi Isagani,

      You are welcome.

      Jestine

      Likes(0)Dislikes(0)
  21. eas

    September 13, 2013 at 8:42 am

    Hi mr yong
    i'm glad i've subscribe to ur site from time to time i'm recieving tips from email that helps me alot thank you for your kindness

    eas

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 13, 2013 at 9:12 am

      Hi Eas,

      You are welcome!

      Jestine

      Likes(0)Dislikes(0)
  22. Patrick Adika

    October 4, 2013 at 7:38 pm

    Hi Mr Yong?
    I really like your detailed way of solving problems. I have in the past benefited from your advice on the jungle IC power regulator Capacitor you remember one that used to loose contrast settings every time you adjust?????

    Continue with your good work

    Patrick Nairobi Kenya

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 4, 2013 at 8:57 pm

      HI Patrick,

      You are welcome and thanks for the support.

      Jestine

      Likes(0)Dislikes(0)
  23. Wole adu

    October 6, 2013 at 7:51 am

    Thank You for this posting.
    I just repaired my LCD TV with same fault.

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 6, 2013 at 8:16 am

      HI Wole,
      You are welcome and good to hear that.

      Jestine

      Likes(0)Dislikes(0)
  24. Dionesio Estupa

    October 7, 2013 at 9:27 pm

    Hello sir Jestine thank you very much I really learn more about troubleshooting

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 7, 2013 at 10:33 pm

      Hi Dionesio,

      You are welcome.

      Jestine

      Likes(0)Dislikes(0)
  25. Mos

    October 20, 2013 at 10:44 am

    Hi Jestine,

    I can't get a power IC FSQ510 (Fairchild) locally. Can I pay through western union if you can find one for me. Thanks.

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 21, 2013 at 9:39 am

      Hi Mos,

      Sorry i do not sell parts. Try utsourse.net or ebay.com to see if they have this part or not.

      Jestine

      Likes(0)Dislikes(0)
      • Mos

        October 23, 2013 at 2:12 pm

        Thank you Jestine. One more question. Will it make a difference if I purchase the IC from the US which uses 110v. Our power rating is 240v.

        Likes(0)Dislikes(0)
        • Jestine Yong

          October 23, 2013 at 8:52 pm

          HI MOS,

          No different as long as the part number is the same.

          Jestine

          Likes(0)Dislikes(0)
  26. uday

    November 27, 2013 at 9:13 pm

    Dear Justin
    thanks for reguar update of LCD TV/monitor'
    one of my LCD TV in office has same pblm which is mention above, i found two filter e-caps bulky and e.liquid come out . i replaced with new ones. TV work for a day, and same REd LED some time comes Green but LCD does not turn on. what is the plbm now, i check both filter e-cap was ok.
    pls suggest?

    Likes(0)Dislikes(0)
    • Jestine Yong

      November 27, 2013 at 10:16 pm

      HI Uday,

      I suggest that you recheck that area and you need to check filer cap with ESR meter. If you do not have this meter direct replace the e-caps and retest.

      Jestine

      Likes(0)Dislikes(0)
  27. Keith Ford

    February 5, 2014 at 2:20 pm

    Thanks for the article! Most Tv's have a small and simple problem,

    Likes(0)Dislikes(0)
    • Jestine Yong

      February 5, 2014 at 2:50 pm

      HI Keith,

      You are welcome. Yes most TVs and other electronics gadget have many simple problems and it can be solved just by replacing few caps.

      Jestine

      Likes(0)Dislikes(0)
  28. chinedu

    May 6, 2014 at 1:47 am

    Master i am very glad for all your electronics repair tips you are sending to me,thank you very much,master i have little problem with one of my customer LCD television he brought to me,when i put it to the power source it bring red light,if press the power button it will start blinking continuosly without powering,i have checked the power board i did not see any bad capacitor inside it,i checked the 5volt output it gives me 4.9volts, master please help me out.the televissin model is LCD32-407 technika product.

    Likes(0)Dislikes(0)
    • Jestine Yong

      May 6, 2014 at 7:58 pm

      HI Chinedu,

      Standby means either:

      1) CPU IC got 5 volt but cannot send out the "On" signal due to the ic itself have problem or the EEPROM IC have corrupted

      2) CPU IC could send out "On" signal but it can reach the main power supply section due to bad components in the optoisolator ic and surrounding components problem

      3) On signal can reach the main power supply but main power supply it self have bad components like shorted secondary diodes, bad power ic and etc.

      4) There are shorted components in the secondary side.

      Jestine

      Likes(0)Dislikes(0)
  29. Asa Fisher

    July 17, 2014 at 5:12 pm

    Hi Jestin I don't have no Website Iam a woman fixing TV's I'm trying to fix LCD,plasma, and Led. Andprojector Tv's I have read you tip's and are thankful for it it help's me a lot I would be please if you send me also tip's thank you

    Likes(0)Dislikes(0)
    • Jestine Yong

      July 17, 2014 at 7:58 pm

      HI Asa,

      May I know what tips you are referring to?

      Jestine

      Likes(0)Dislikes(0)

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