Burnt Out LED Strip In Samsung UA32EH4003 Repaired
A young lady came to my shop and asked me to go to her car and help her pick up a TV that needed repair. It was a 32 inches LED TV.
Once I powered it up, I could see nothing coming on except a stand by light flickering and then it goes into shut down.
For a moment I assumed this was a power supply issue but…the customer mentioned something about a burnt smell that was coming out of the TV and that is why she brought it for repair.
When I took the back cover off and checked for burnt component I found nothing. All voltages were normal except at the LED light power socket which gave me the indication that something have to do with the LED back light was faulty. The voltages there were reaching 170 voltages then these readings drop down to almost nothing.
I could some dark areas on the board near the LED light socket but it was a surface one and it gave me more indication that something is faulty with the back light.
I took the TV frame out, dismantled the actual screen panel very carefully and finally I got to the back light area. Take a look
This TV has only two LED strips and one of them was burnt out explaining what the customer mentioned earlier.
If you look to the far side of the LED strips, you could see that someone worked on this TV. I could see some soldered spots on board. The LED light strips were beyond repair and the only way to get this TV fixed is by only replacing the LED light strips with new ones.
These strips are hard to find except to order them online. If I order them online that means at least 22 days for waiting. I called the customer and explained the situation and the young lady asked me to look around and if we cannot find them here, then we will order them online.
Well, I called all the technicians that I know and one of them who lives about 45 minutes drive from my shop says he had the same exact TV but the Panel was broken so he was willing to sell them to me for a fair price.
After I got my OK from the customer to go ahead and get these LED lights whom by the way I forgot to take a photo of before installing. I apologize about that.
After I installed the back lights and I powered up the TV, the stand by light came on and steady after few flashes. I put the TV back together and……
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.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check his previous repair articles in the link below:
https://jestineyong.com/a-technician-mistake-shorted-out-a-ups-device/
(76)Dislikes
(0)
9 Comments
Leave a Reply
Kostas Dontsios
August 20, 2019 at 12:49 pm
Hello Waleed.
You could replace the bad leds with other ones.There is no reason to replace the whole strip of leds.
I have a stock of all the leds ,eg 2.7 volt,5 volt (LG models) .It is very easy to order online.They are very cheap.
Then you could replace individually.But you have to take care about the reflector of each one to attach it with glue.I use gun thermal glue.Also because usually the new leds have stronger light it is better to use black glue around the reflector and make a black dot at the center of it with a marker because there will be brighter spots at the lcd.
Waleed Rishmawi
August 20, 2019 at 3:36 pm
Kostas: yes I am very aware of that but the damage was great and I found it easier to replace the strips instead of the damaged LED light. have a blessed day
beh
August 20, 2019 at 4:14 pm
Waleed
some times the only way is to buy a broken panel tv and sacrifice the parts to other ones and by experience, the best way is: if you have a bad LED replace all strip, not just that one. well done and thanks.
cheers
beh
Waleed Rishmawi
August 20, 2019 at 8:35 pm
Beh: yes, I buy a lot of broken TV's from Customers who throw their TV's away and sell parts for good income. I get a lot of LED strip but there are a lot of models out there and keeping up with that is a lot of work nd time consuming.
Albert van Bemmelen
August 20, 2019 at 3:02 pm
Repairing the Led backlight strips is still a lot of work and they cause a lot of problems compared to the old CCFL backlight tubes. So good job and gaining another happy customer. These timeconsuming repaires will be over when OLED panels have become common goods. They require no backlight and each individual pixel is extremely energy-efficient too. Since only today's LED TVs need a backlight to produce brightness, the future is probably brighter in both ways.
Justice
August 20, 2019 at 6:27 pm
Yes yes yes what a comments all collegueas are giving making me gain even more knowledge, thank you Walleed and to all other electronic farnety. I would also replace the entire backlight strip.
Waleed Rishmawi
August 21, 2019 at 2:56 pm
Justice: you are most welcome. have a blessed day
Waleed Rishmawi
August 20, 2019 at 8:38 pm
Albert; I hate to work on CCFL tubes on TV's. I would rather work with LED lights instead. I agree it is time consuming but I love doing this kind of work which I found rewarding in many repair cases.
Parasuraman S
August 23, 2019 at 12:20 am
A good article throwing 'light' on replacing lights! Something I never venture to do, because I have put a limit upto panel. Anything from T-Con board to panel, I never take up! But good to add up knowledge, especially when it comes from veteran like you!