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LED TV That I’m Not Able To Repair

By Jestine Yong on December 8, 2017

The complaint of this 32 inch LED TV was white screen with color vertical lines in a square box as seen from the photo below:

Before I opened the TV casing, I already knew that this kind of problem was usually due to the LCD panel, ribbon cable or the T-con board.

Once the cover was removed I could clearly see the power supply board and the mainboard while the T-con board was covered by a metal casing-see the photo below:

From the visual inspection it seems that all the circuit boards were fine until the panel board was exposed. I was shocked to see this kind of problem-see the photo below:

The panel PCB ribbon was burnt and this was my first time seeing such problem after had repaired many LED TVs throughout my repair career. To add salt into injury the other side of the panel board was also had problem-see the photo below:

I told myself there is no way to repair such problem unless if I have the Tab bonding machine and the parts but then again to repair such problem it will be very costly and I’m pretty sure the customer would not be willing to pay for the high cost of repair.

I can say that, even if you have the machine, it will not be 100% working after fixing the new ribbon because there must be a cause of why the area was burnt.

If you have read all my previous repair articles, I’m sure you can see the success in every repairs that I had posted but not in this case where I’m not able to fix it due to the reasons that I have mentioned above. If you have any comments about this situation I really would like to hear from you.

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

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Note: You may check out his previous post in the below links:

https://jestineyong.com/sound-problem-in-meg-xl-tower-active-speaker-repair/

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LED TV Repair

11 Comments

Albert

December 8, 2017 at 9:18 pm

Completely understandable why this repair is costly ,timeconsuming and a big risk!
So would be buying a Tab bonding machine no doubt.

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Lawrence Mc Coig

December 9, 2017 at 1:03 am

Looks like self destruct mode switched on. Chemical damage perhaps.

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Robert Calk

December 9, 2017 at 2:18 pm

Good job, Suranga. Sometimes repairs are just not economical. Even if you did repair it, it may not last long because other components may have been weakened and soon fail thus making it more economical to just buy a new TV.

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Yogesh Panchal

December 9, 2017 at 11:09 pm

Suranga,

About 90% vertical line problems In LCD are due to this cable system technology and around 90% equipment related to this technology is going to dumping ground every year.in CRT TV you can arrange any similar size tube and replace it with without much efforts.this type of design is waste of money and also waste of natural resources also.here in India there are labs available for this type of Screen repair but question is to carry and transportation the screen to that lab is very difficult it can easily get damage in transport.

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- Suranga Electronics
  
  December 13, 2017 at 1:26 am
  
  Hi, Mr. Yogesh ,
  Yes yogesh i Agree With you.
  The good Decision is not repair this Type Tv.
  Thank you!
  
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Amir Mukhtar Ashrafi

December 11, 2017 at 3:22 pm

Thank you Mr. Suranga Bandara for Sharing Experience.
No matter Repair OR Not But Trying is the main thing to do fix.
However, Thanks you Again

Amir Mukhtar Ashrafi
A Student of Electronics
Karachi .Pk

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- Suranga Electronics
  
  December 13, 2017 at 1:28 am
  
  ok Thanks Friend .
  
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mahmoud_tajpour

December 13, 2017 at 3:35 am

Hi dear Bandara thanks for the best article you did a good job of not repairing this device and we also never repair such a device in IRAN but we will sell this for about $10 and we use the parts. good luck.

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Parasuraman S

December 23, 2017 at 11:41 pm

A very wise decision indeed!

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Lawrence Pina

January 27, 2018 at 12:30 am

I've seen similar damage many times, always on TV's having the T-Con and driver boards located at the bottom of the display instead of at the top. It's often caused by a liquid spill. In at least one case, a tom cat backed up to the screen and marked it for his very own. That was obvious from the odor. Other times, it happened when glass cleaner was sprayed directly onto the screen (instead of onto a cloth) and allowed to drip onto the driver boards. In those cases, the area smells of detergent. Was there any evidence that liquid spill in your case?

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Lauro cunha

March 22, 2019 at 10:26 pm

I'm with a tv on my bench Samsung un40h4200ag that arrived with three tracks of the cof of the vcon broken I re-made the tracks now turns on appears the image whitish after 2 minutes it is all white washed but with sound. What can it be?

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