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Unwanted Visitor Found In LG 43 Inch LED TV

By on July 29, 2020

how to repair lg led tv no power

The complaint of this LG 43″ Smart LED TV was no power. Once the TV cover was opened, I could see three boards; the main board, power board and the T-con board. Look at the photos below:

smart lg led tv repaired

fixing lg led tv

lg led tv mainboard

The main fuse was open circuit. I need to remove the power board and check for shorted components.

When I flipped the power board I was terrified for a while because I did not expect to see such a big gecko (unwanted visitor)! This is the reason why the main fuse was blown.

repairing lg led tv no power

I need to clean the affected area with solution. After that I used hair dryer to blow the area to make it dry.

dead lizard in lg led tv no power

I began to check on the components in the primary power side. The main power FET was shorted but the power IC did not have any shorted reading.

I replaced the power FET and connect a light bulb to test the power supply.

shorted fet in lg led tv

The bulb went dimmed and this was a good sign that I can put in a replacement fuse and powered it up. I was happy when I saw the TV came back alive!

blown fuse and fet in lg led smart tv

blown fuse and fet in lg led smart tv repair

Conclusion- Troubleshooting and repairing TV power section was not tough if you know what you are doing. You must equipped with some knowledge in order to fix power supplies successfully. If you want to add more power supplies repair knowledge, I  suggest that you check out Jestine’s Yong SMPS repair ebook here.


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

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  1. Lewis Spedding

    July 29, 2020 at 9:01 pm

    Really interesting repair with unwanted visitor Thank you

  2. Gary Cale

    July 29, 2020 at 9:37 pm

    Thank you for another article with a most unusual diagnosis. Appreciate your willingness to frequently present informative work you have done.

  3. Gilberto

    July 29, 2020 at 9:57 pm

    Solo como curiosidad ¿Qué hiciste con el gecko? solamente espero no lo hayas matado.

    Just out of curiosity, what did you do with the gecko? I just hope you haven't killed him.

  4. Parasuraman S

    July 29, 2020 at 10:51 pm

    Good repair! One doubt: Did you block the vent through which this found its entry? Else, you can expect it back soon! If its a female, a 'desperate' male will enter tracking it for sure! (LOL)

  5. Albert van Bemmelen

    July 29, 2020 at 10:54 pm

    You cleaned the affected area with solution. What used cleaning product is that exactly? Is that some sort of diluted bleach or sodium hypochlorite?

  6. Imoudu ONWUMAH

    July 30, 2020 at 12:04 am

    We all know these reptiles come in for warmth being generated by tv,and blocking the vent I guess it would increase temperature in tv which is not good for the appliance.ln my country we hardly experience such thing for we have high temperature,So no gecko inside tv for warmth.

  7. Success Ndlovu

    July 30, 2020 at 12:16 am

    Thank you very much for keeping us updated

  8. John Peplau

    July 30, 2020 at 1:46 am

    Gotta love these stories. It’s when you least expect it when it happens to you. It happened only twice to me in my 50 years of working on TV’s mostly.

  9. Waleed Rishmawi

    July 30, 2020 at 1:31 pm

    I just hate unwanted visitors in such devices. Last time I had unwanted visitors on a gate control board and the damage was severe

  10. Gassan Ali

    July 30, 2020 at 5:43 pm

    Great work! We keep asking posing questions to our good friend Suranga while we know he'll never answer us. It's kinda funny.

    • Parasuraman S

      July 31, 2020 at 11:03 pm

      Yes, I have never seen him responding! That is very unfortunate. May be, Jestine Yong can take it up with him! We learn a lot more through such interactions. Moreover, the writer is not going to respond, how will a doubt be cleared! In fact I thought of writing about this earlier, but you pushed me in! Many thanks!

  11. ivan

    July 31, 2020 at 5:34 pm

    ylohh, thanks,, sorry to hear visitor.,

  12. Yogesh Panchal

    July 31, 2020 at 10:29 pm

    Good Repair! Suranga

  13. Humberto

    August 3, 2020 at 10:47 am

    In my country we use sun baths due to intensive heat.

  14. Raj

    August 5, 2020 at 9:42 pm

    Good job.. Thanks for sharing.. Wonder how such a big lizard could go inside.


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