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Display Problem In Samsung LCD TV Repaired

By on December 5, 2014
lcd tvrepair









I have got a call from one of my clients about his home Internet was not working. The router was not getting the DSL light thus I have to contact the internet service provider. Unfortunately at that time the internet service provider could not provide the solution due to some technical problems. Before I left my client offered me a cup of tea and asked if I have any reference of technical guy that could repair LCD TV.

lcd tv repair

He said the LCD TV had display problem. I have asked his permission to let me try if I can solve the problem. After he had granted the permission, I removed the TV cover and started on the troubleshooting by doing a visual inspection first.


There were no physical damage or burn marks and each of the circuit boards solder joints seem to be intact.

lcd tv repairslcd tv repairinglcd tv repairings

Now I’m stuck because I did not carry required tools for TV Repair. Suddenly I got an idea why not try clean LVDS cable contacts and see how it goes. Hence I have removed the flat cable and what I found was; there was oxidation on golden contacts hence I have cleaned the contacts by rubbing it using a rubber Eraser. 

how to repair lcd tv

After the cleaning work, I put everything back and turned the TV “ON”. Guess what? The display problem was gone and there was a smile on the customer face.

how to repair lcd tvs

This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.

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Note: You may also check out Fernando Frias article on LCD TV repair below:




  1. Anwar Shiekh

    December 5, 2014 at 11:12 pm

    I am one who uses silicone oil on connectors to try an avoid oxidation problems.

    • Amir Mukhtar

      December 9, 2014 at 12:59 pm

      Mr. Sheikh
      Share in Details Which type and Procedure about Silicone Oil use on Connectors.

      However, you do great.

      Amir Mukhtar Ashrafi

    • Heidy Van Hek

      December 18, 2014 at 12:51 am

      Wow! That is great you be surprised sometimes how a little problem could solve a big one. But... the initiative is never give up and always "think" of different solutions this is my personal view of anything in life. When in doubt go on the internet and someone might have the same problem and you can find the answer. It is always worth a try. Thank you so much for sharing this with everybody I am myself repairing a Samsung HD T220 monitor with LCD display problems. However, I feel like I am the only female that is interested in electronics repair.
      Thank you again for sharing and keep up the good work never give up.
      Heidy from Intrique Computer and Cellular Systems in California

  2. Silvio Regis Silva

    December 5, 2014 at 11:27 pm

    I bet the customer found expensive repair.

    • Mayor

      December 8, 2014 at 3:45 pm

      That is great.

  3. Humberto

    December 5, 2014 at 11:57 pm

    Problem solved. Good job Yogesh Panchal.

  4. Erik

    December 6, 2014 at 12:00 am

    Simple repear, but how is it possible to get
    oxidation on golden contacts ???
    Gold does not oxidate!
    from the Netherlands

    • JG Ayala

      December 6, 2014 at 9:02 am

      Probably is Gold Plated.. if it is you will see some corrosion in time.

    • Raheel

      December 6, 2014 at 2:07 pm

      all friends.erik replies (gold does not oxidate)good answar good question erik.i like your reply.

  5. Andre Gopee

    December 6, 2014 at 12:18 am

    Nice job Yogesh, keep up the good work

  6. Vasile Petrica

    December 6, 2014 at 1:47 am

    Good job!Good to remembering!

  7. Sameer

    December 6, 2014 at 4:24 am

    Excellent work Yogesh.Just shows you just have to " scratch the surface of the problem before delving too deep and expect something major".I'm really enjoying your articles.

  8. Mark

    December 6, 2014 at 4:27 am

    Hey Yogesh,
    Thanks for sharing your repair.
    I hadn't thought of using an eraser to clean contacts.
    I'll keep that in mind for future repairs.

  9. Lynn H. Blakely

    December 6, 2014 at 6:10 am

    Nice pictures, and good solution. I have used the pink erasers, and grey
    ink erasers to clean foil to prepare for soldering. This repair is a good example to show that all repairs do not require replacing bad components. I haven't use silicone oil to prevent oxidation, but have used WD-40. On automotive batteries I use lithium grease. I have used DeOxit on contacts of switches, and connectors. Cleaning contacts is important, but stopping the oxidation, or effects of the environment is equally needed.

  10. Robert

    December 6, 2014 at 8:54 am

    Good job, Yogesh. Thanks for the article.

  11. Gary Gemmell

    December 6, 2014 at 8:58 am

    Clever fix with no tools
    I like
    Well done Yogesh
    Having minimal resources and manageing a fix soon shows who the real engineers are...
    I hope you didnt charge the customer!!!

  12. JG Ayala

    December 6, 2014 at 9:07 am

    Never stop to amaze me that the best repair are the best and simple ones. A thorough visual inspection of components and plugs can solve many headaches. I specialized fixing Old/Vintage Radios and High Ends HI-FI. The first thing I do is VISUAL... Mr Yong keep telling that through out his books and comments. This was an excellent article!!!


    JG Ayala

  13. Sasanka Sekhar Nayak

    December 6, 2014 at 9:15 am

    Good Job Yogesh and nice solution.

  14. w f torres

    December 6, 2014 at 10:38 am


  15. biruk aweke

    December 6, 2014 at 12:22 pm

    very nice thanks for sharing.

  16. Sarath Malliyawadu

    December 6, 2014 at 12:58 pm

    Thanks for shearing it with us

  17. Jayakumar

    December 6, 2014 at 2:08 pm

    Nice Job

  18. marco tapia

    December 6, 2014 at 4:33 pm

    Well done yogesh it's finally good to see some lcd article's, thank you. 🙂

  19. Mike Zook

    December 6, 2014 at 10:48 pm

    Good job Yogesh. It is always a good idea to clean contacts on all conections as part of a complete repair. I've used an eraser for over 40 years to do the same. One thing to remember is that erasers have an acid that is in them that can corode the contacts over time. So it is also a good idea to follow the eraser cleaning with a cleaning using a damp cloth or paper towel with 70% or greater clear alcohol. That will remove the acid from the eraser and restore the contact point. Also pure gold does not oxidize but anodized gold will because of the other additives it contains. The best way to prevent oxidation after a cleaning is to apply a very thin coat of Blue Cramolin to the contacts. It seems to out last all of the others.

  20. REZA

    December 8, 2014 at 3:06 pm

    hi Yogesh Panchal
    thank u for this good experiment

  21. Carlos Edgar Penecios

    December 8, 2014 at 8:13 pm

    Thank you for sharing this nice article..I'm also using eraser in cleaning contacts..Nice job..

    • Amir Mukhtar

      December 9, 2014 at 12:56 pm


  22. Amir Mukhtar

    December 9, 2014 at 12:56 pm

    Thank you Mr. Yogesh Panchal for Sharing nice article with solution.

    you did great and reasonable work to user.
    Good Job

    Amir Mukhtar Ashrafi
    Karachi. PK

  23. henry nyeche

    December 9, 2014 at 5:13 pm

    Brother i tell you is good to share ideas, you have done real well by sharing with us keep it up

  24. Nimal

    December 25, 2014 at 2:35 pm

    I too use the eraser trick on ram cards when I repair computers. Thanks for sharing your experiences.

  25. Taring K Arioka

    December 29, 2014 at 5:17 pm

    Clever idea and thank you for sharing.


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