This 48″ Panasonic LED TV belongs to the church where I do worship, this TV was mounted on the pulpit for purpose of receiving satellite service from headquarters church.
So some months ago I noticed bright spots started appearing on TV screen which also was increasing in numbers over some months, picture below shows TV hang on pulpit.
Initially I don’t know what caused this symptom, so I did google it on YouTube where I watched the video of such problem and solution.
Problem: The bright spots is as result of fallen off of LEDs reflectors which causes light beam not to cast against background.
Solution: So I dismantled the TV in my workshop, removed bezel, panel, sheets and see what happened on pictures below:
About two third of reflectors had fallen off.
Then I removed all reflectors, 68 in all and use super clue to adhere all back to cover the LEDs properly, then coupled all parts together and switch on TV and the result below:
Then slot in flash drive to play the church choir songs. This is the finished repaired work.
This article was prepared for you by Imoudu Onwumah from Nigeria. He is 62 years old and has just 3 years experience in electronics repairs. I started career in hotel industry as a chef, but then I was doing repairs only in electrical repairs as a hobbyist. In 2018, I decided to learn about electronics which through Jestine’s electronics e-books and holding my hand, am an electronics techie today.
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Very good. I have see this symptom in the field and know what the issue is but have never had the pleasure of remediating one. I often wondered if superglue (cyanoacrylate) was okay to use for the job. If it wae optically clear enough, if it could withstand the heat of the LEDs and if it would darkerln from said heat over time. Guess time will tell!
Tayo,
Thanks for your observation on super glue,I also envisaged such future problem on use of this glue,perhaps 4 minutes glue maybe better.Well as you said time will tell.
Excellent job and unique problem! Your way of self-learning is also laudable!
While refixing the reflectors, we should ensure that they are fixed in proper positions, without which the focus might not be proper and light diffusion would not be even.
Fixing this 48 inch 125 Watt tv without breaking the screen or the flexprints was a risky job on its own. And gluing all 68 led diffusers correctly back with superglue another task you managed perfectly too!
Let's hope it will last for a very long time because repairs like these are never much fun!
a very good job on the repair and thanks for sharing. one comment i could say about this is if the LED diffusers are not put back togther the right away it will still be displayed on the panel. in my humble opinion all the LED should be replaced with new ones but i said before you did a good job gluing the diffusers back on the right way and I am sure it was a lot of work doing that. have a blessed day brother.
Waleed.R
The tv is for a village church and I didn't want to put any financial burden on her,in the light of purchasing new leď strips.So l did the repair without any financial cost.Have a nice day.
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Tayo
September 9, 2023 at 7:06 am
Very good. I have see this symptom in the field and know what the issue is but have never had the pleasure of remediating one. I often wondered if superglue (cyanoacrylate) was okay to use for the job. If it wae optically clear enough, if it could withstand the heat of the LEDs and if it would darkerln from said heat over time. Guess time will tell!
Imoudu.O
September 10, 2023 at 11:40 pm
Tayo,
Thanks for your observation on super glue,I also envisaged such future problem on use of this glue,perhaps 4 minutes glue maybe better.Well as you said time will tell.
Parasuraman S
September 9, 2023 at 11:01 am
Excellent job and unique problem! Your way of self-learning is also laudable!
While refixing the reflectors, we should ensure that they are fixed in proper positions, without which the focus might not be proper and light diffusion would not be even.
Albert van Bemmelen
September 9, 2023 at 2:51 pm
Fixing this 48 inch 125 Watt tv without breaking the screen or the flexprints was a risky job on its own. And gluing all 68 led diffusers correctly back with superglue another task you managed perfectly too!
Let's hope it will last for a very long time because repairs like these are never much fun!
Waleed Rishmawi
September 9, 2023 at 7:17 pm
a very good job on the repair and thanks for sharing. one comment i could say about this is if the LED diffusers are not put back togther the right away it will still be displayed on the panel. in my humble opinion all the LED should be replaced with new ones but i said before you did a good job gluing the diffusers back on the right way and I am sure it was a lot of work doing that. have a blessed day brother.
Imoudu.O
September 10, 2023 at 11:46 pm
Parasuraman.S
Thanks for your comments sir,I did my best to refix reflectors well.I only develop lower back pain in fixing all back.
Imoudu.O
September 10, 2023 at 11:48 pm
Albert van
Thanks for your comments sir, time will really tell if I used the right glue for the repair
Imoudu.O
September 10, 2023 at 11:55 pm
Waleed.R
The tv is for a village church and I didn't want to put any financial burden on her,in the light of purchasing new leď strips.So l did the repair without any financial cost.Have a nice day.
Yogesh Panchal
September 16, 2023 at 5:08 pm
Good Fix! ,Imoudu.O
I have pinpointed the same problem in your last article Comment.