A LED TV Repair Attempt With A Disappointing Result

By on March 19, 2018
how to repair and fix led tv backlight

 

 

 

 

 

 

 

 

 

 

A 28 inches LED TV was brought to my shop. There is no display but the stand by light comes on green and it stays green. That is a normal behavior for a LED TV and likely the LED lights are open or most likely just one LED light open and affecting the whole strips of LED lights there. Let take a look.

led tv repair

I never seen this brand before but I am very sure it is a Chinese made LED TV.

repair led tv

Here is more information on the back of the TV.




As always, take all the screws you see on the back of the TV and then you will be able to see inside the TV set.

led tv panel repair

Back cover is off and the front screen panel is out as well. Here you need to exercise caution not to break this screen because if this happens, the TV is destroyed beyond any hope for repair.

led tv backlight problem

Black frame off and I was able to see the LED lights with their diffusers attached. Once the white reflector off I could see the actual strips of the light and here where the fun begins.

how to fix led backlight

You have the choice here of testing the actual LED light individually or get a LED tester machine and test the whole strip at the same time. After doing the test for the whole LED strips in there, as expected, I found only one LED light was open and it was affecting the whole LED strips on this TV.




I could not find a replacement for the LED light and that is why I shorted out the positive and the negative of the LED light. In other words, I am cancelling out the LED light and making it a connection to the other LED lights.

usually I test the TV set and if everything goes well, then I take out this open LED light and replace it with a new one or replace the whole LED strip in that TV .

how to repair and fix led tv

As you can see, my whole repair time wasted in vain. I later was told by the customer that this TV was sent to another repair guy and he is the one who broke the glass panel. I was so mad at this customer and tried to tell him politely that what he did was unacceptable. He should have told me about the broken panel and I should not have wasted my time in vain on this repair.

Conclusion: always check the panel before doing any kind of repair on TV’s. I believe it can be checked with a flash light and see if there are cracks on it. I have made a new policy in my shop that if I replace the LED light strips on any LED TV and later on I found that the panel is cracked, the customer has to pay for the wasted time spent on the repair. The customer has to agree to such policy otherwise, I will not do the repair. I have learned a valuable lesson here and I am extending this experience to you as well. Mission accomplished.

This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.




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11 Comments

  1. Robert Calk

    March 19, 2018 at 6:07 pm

    Good job, Waleed. Evidently the customer doesn't value your time. I'll bet he wouldn't like someone else wasting his time.

    Likes(5)Dislikes(0)
    • Waleed Rishmawi

      March 28, 2018 at 6:15 pm

      thanks Robert. after I talked to the customer he offered me some money in return for the wasted time. it was not totally in vain.

      Likes(4)Dislikes(0)
  2. Albert van Bemmelen

    March 19, 2018 at 6:15 pm

    A very well given warning! Indeed fixing the backlight of a defect LCD screen is a waste of valuable time.

    Likes(2)Dislikes(0)
  3. Justice

    March 19, 2018 at 7:11 pm

    Interesting policy and information.

    Likes(2)Dislikes(0)
  4. Parasuraman

    March 19, 2018 at 7:41 pm

    Many times customers test our patience by doing a double check on another technician! But these are occasions for reinforcing tolerance in us!

    Likes(4)Dislikes(1)
  5. Nawual

    March 19, 2018 at 9:51 pm

    Good idea,because i remember a customer that said the screen was not broken before when give me for repair.Regards

    Likes(3)Dislikes(0)
  6. Suranga Electronics

    March 20, 2018 at 1:53 am

    Hi Waleed.
    This type of pictures Line fault may be caused by T.con board or Panel Pcb main voltage missing especially VGH ,VGL Voltage. Have you checked the supply? I have done before this kind of job.

    Likes(6)Dislikes(0)
    • Waleed Rishmawi

      March 28, 2018 at 6:13 pm

      Suranga: this is a broken screen. nothing to do with the T con board. it is simply cracked and need a replacement.

      Likes(2)Dislikes(0)
  7. Ulises Aguilar

    March 20, 2018 at 11:58 am

    Mr Rishmawi You are right the customer make loose time , Mr Rishmawi I always charge 10 Dollars only for diagnose,and if is repair I will add the 10 Dollars in the repair ,,,,,,dont forget Your time for all the techs , WE BY TOOLS THE COST MONEY AND TIME SIR, next time dont get mad charge the 10 dollars for diagnose

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  8. warna

    March 20, 2018 at 12:58 pm

    thanks for you identification about that point.

    Likes(1)Dislikes(0)
  9. Andrew F. Ali

    March 20, 2018 at 9:02 pm

    Usually I would take a service deposit which would cover my time spent on every repair. I would explain to the Customer that this is to cover by electricity bill and my time and this is not refundable whether the set is repaired or not. If they hesitate to pay this upfront fee I do not take the job. It's that simple.....

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