Display Problem In LCD TV Repaired
The complaint of this Singer LCD TV was distorted display with a white vertical line across the screen.
From experience, whenever I see distorted display in the screen the first thing I do would be to check the ribbon cable contacts (connector).
If the contact is dirty, rusted or filled with dirt, it would not be a surprised to see the TV screen with distorted picture or with some weird symptoms.
Once you have located the connector, then gently lift up the socket cover so that the cable can be removed.
Detach the other side of the cable too as you need to clean both sides to fully restore a good picture.
You can use chemical spray contact cleaner and eraser (bottom photo) to remove the dirt and make the contact pins shinning again.
Once the connectors are properly ‘serviced’, you can gently insert the cables back to its location. Do not force it as you insert it otherwise the cable contact pins can bend. This will create another problem and need more time to solve it. So do it safely in the first time to avoid unnecessary problem. After fixing back the cables and powered On, look at the TV screen below:
Conclusion- If after cleaning the ribbon cable and the problem still persist this means it is not the contact problem. In that case, you may have to check the LCD Panel, T-con board or even the motherboard. If you need to increase the repair knowledge of LCD /LED TVs you can check out Damon’s and Kent’s ebooks.
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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Note: You may check out his previous repair article in the below link:
https://www.jestineyong.com/no-power-in-hitachi-tv-repaired/
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Anwar Shiekh
September 9, 2015 at 8:28 pm
I recently had intermittent crashes on a PC, and changing the power supply and RAM did not help; but for some reason I tried silicone oil on the CPU pins and the problem was solved. Contact issues are more prevalent than I had imagined.
Allan
September 9, 2015 at 9:46 pm
I so much like your diagnosis. Attend to basics first and "whalla" it's working. Great stuff Suranga!!!
Joe
September 9, 2015 at 11:47 pm
Great simple solution, nothing beat a simple troubleshooting tools "your eyes and common sense". Happy to hear your results...
Humberto
September 10, 2015 at 1:38 am
Good idea in cleaning the contacts. I like the eraser method.
Dennis Breda
September 10, 2015 at 6:47 am
Than you for sharing. Well written and presented.
Mark
September 10, 2015 at 7:19 am
Hey Suranga,
It is so easy to get bogged down with complex diagnosis, when sometimes it is something simple and easy to repair.
Thanks for your detailed and well written article.
Ulises Aguilar Pazzani
September 10, 2015 at 12:37 pm
nice tip
Yogesh Panchal
September 10, 2015 at 6:43 pm
Suranga,
Thanks for another good article.
Kevin
September 10, 2015 at 7:24 pm
Thanks for simple fix. Great work. I can not imagine how many devices from around the world are disposed of just because of a minor issue like this.
Robert Calk
September 11, 2015 at 10:47 pm
You are right Kevin. Many people just throw stuff away and buy new since they are not too expensive most of the time. I'm sure that makes manufacturers very happy!
My sister bought a Projection screen TV ( about 60 inch) from a garage sale for $50US around a year ago. I have been waiting for it to break down so I could fix it and write an article about the repair, but it is still working great.