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LG47 TV repair - backlight flashing/OFF issue (47LB5610)
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- čas přidán 4. 06. 2018
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Model number : 47LB5610
1. Please mind your safety: I am not responsible if you blow yourself or your TV. Even unpluged the electronic boards might have high voltage and give you deadly electroshocks.
2.Sorry I did not made video of LED removal and soldering because I ran into some troubles... The LED model needed was 6V and I got only 3V. So I tried to solder two leds in series which was not the best idea. I ordered the 6V LED and will change again when I receive them, I think the 3V LEDs might not hold for long as their amp rating is lower.
3. I ordered the LED on aliexpress, I advise you to order the different models (6V, 3V ...) as they are cheap.
fr.aliexpress....
thx for all the posts on the topic. Finally went to repair shop checked prices of a complete set of backlights understanding the problem. Great feature guys did it while i waited brought the 43in lg smart UD. Was made in 2017 so with a price of $160 was a pretty good refurbish with a 3-month warranty. yeap took about an hour but i brought it in for a bit of a discount. Was able to confirm backlight problem with all the info from all your t.v. guys.
Thank you, good video. I use to work on TV for years, but never a flat screen. Someone gave me a large one, and everything look good in the power supply, so it has to be in the lights. I know what to do now, so many thanks my friend!!!!!
Thanks for the video! Managed to replace led strips on my 50LB561V today instead of buying new TV. =)
Interesting is that you can use the diode setting on a DMM to test each LED individually and not require a lab power supply. I'm not sure all LED strips have individual LED test positions/points. Thanks for sharing. Maybe using two 3V next to each other would work better if worried about voltage loss on luminosity low.
he did that and it created a bight spot, on the other one he just put a single 3v in and it worked better, entire brightness down by a little. each led losing a miniscule amount of brightness, but at least its even doing it that way.
i admit if it were me i would have done the two 3v in parallel to match 6v too though..
Interesting. I've seen a very similar problem of image rapidly flashing on and off on a tv (everything else working fine, sound, changing channels, etc), and the problem was the lvds cable (which connects the mainboard to the tcon). It seems like you went straight to the LEDs without even conducting a preliminary test. It would suck if all the work of accessing the LEDs was for naught.
My TVs screen is fine but the image flickers like it pops up and goes away constantly I can see everything on the screen for a second then it goes away and come back
Then it's probably the backlight that is having a issue. Note it can also be the backlight power supply, not necessarilly the LEDs themself
So I don’t really know anything about TVs how do I fix that
Doing this job tomorrow.
Hopefully a cheap fix!!!
Edit:
Done, thanks for the video
After watching your video and others, you made it a bit difficult for yourself in your process. Bit it was useful. Thanks
J'en étais sur ! Un français ! Plus sérieusement, merci pour ce tuto je vais aller réparé ma télévision grâce à toi :D
what minimum power supply do i need for this?
did you solder the individual LED's or replaced the whole strip?
since the leds are cheap, would it be worth it to just replace all leds instead of checking for the faulty one, since i dont own a power supply?
if you can answer my questions, thank you in advance
1) For the 4 led strip, 6 volts per led, in total 24 volts for the 4 led strip, for the 5 led strip, 6 volts per led, in total 30 volts for the 5 led strip
2) He soldered the led individualy, he didn't replace the whole strip
3) If you have the tools to solder, then its cheaper to replace the led, but if you don't have the tools to solder, buying the strip will be cheaper.
Muchas gracias por compartir tus conocimientos Pierre
Hi, I’ll appreciate your assistance with advice on how to fix my TV.
Tv name: LG 49UF770V-ZL.
No video showing on TV from all the 3 HDMI’s inputs when connected to either satellite box and laptop.
When I log-on CZcams through the internet on the TV, the wordings and picture show except the video.
The TV shows pictures but no video.
Thanks for your assistance.
Kind Regards
I have a LG 50LN5750, and basically when I turns on the TV, this show me the LG logo for some milliseconds and then goes black screen, similar flash happen when I turns off the TV. The sounds works.... So I dont know if the issue is the backlight or Main board. Somebody can advice me please. thanks
Same problem happening with my Lg led screen. Did u got solution?
same problem i am worked today. what I find is when i checked output voltage from power board, it waa ok. Also right sides of backlights were ok. in my case i think left side of backlight is issue. just get multimeter and test boards and backlights, but i think 99% issue is backlight
Para desarmar la tarjeta de fuente de alimentación se descarga con un bombillo de horno microhondas y listo sin peligro de shoke estectrico
I have the same problem same tv model and everything looks like a lot of work tho
awesome work dude. my tv has one led that is flickering occasionally, so it is on its way out i think. now when it dies completely i will know how to fix it! thanks :-)
how did you work out what voltage they were? in a manual or something, or was it written on one of the led's or on the strip somewhere, or is there some way of working out their ideal voltage by checking resistance or something?
I checked on aliexpress for replacement parts and found there are 2 models for these kind of TV, 3V and 6V. Then I tested to power one LED first with 3V, which did nothing, then I used 6V. That's how I figured that out
@@pierreboyer9277 awesome, thank you for the information! :-)
video is awesome, when i put back the panel i cracked one corner, bummer; before you guys start the job you need a lot of space where to put the parts; you can find the leds on ebay ~40$
I fixed the board on my mine a couple years ago quick 30 minutes. But no way is this even worth it with great video very instructive by this repair is at least $300 on the low side for labor.
here they ask 200$ problem is i was not sure if it's the led's could have replaced myself. Since it is plug and play. Now if i see flickering i'll know i can buy 1 kit, that is 8 strips of lights for a 47 inch with 30$.
If 1 led is bad whole strip will go off?
I can't believe just a couple of leds caused all that flashing......
Knowledge is Power! Great video you are very talented 👍
my toshiba 47inch led tv showing black screen, have replaced the burnt led strips to new one but it fails to light up, it turns on sometimes, sometimes it wont just a flash and full dead ,at the time of backlit fail i checked the standby voltage read 5v but 12v and 13v are showing 0v and at the led strips voltage drops from 100v to 0v , at the time of lights up the led strips are getting 108v to 114 v and all the values from the t con were good. any idea whats the problem it has ?
Can you help me? I have a samsung TV and after a while or may be cleaning with cloth my tv screen has now while spots in tv seems in a pattern of backlight ! Seems like the light from backlight is not spreading correctly ... It's not properly a spot but you can see dark and light area in a perticular pattern all over the screen.. thanks in advance! 👍
Dear Pierre, Have you got the purchasing codes of LEDs used by Samsung TV to be ordered as spare parts? I am referring to Samsung model UE 32F 5000 AK.
I would like to know the voltage as well if you know it. Thank you. Regards.
Hey PB I have a LG 55ln5400 the back light at the joint really took hit(burned up) the reflector back board has burned marks on it too. Do you know where to order that part from or can I just paint it with high gloss paint ??? Great video!
Need help with my LG TV . So sometimes I turn TV off and I get a blue bar fading out. And now I lost a little of backlight. For 3 days changing backlight settings won't do anything it stays all same regardless 0 or 100 in settings. Not too bad as it was not so dark either too bright. Now is fine again but sometimes of blinks a little almost not visible but blink some area in center blinks black. What could this be ? Thanks in advance.
Those tiny white plastic tabs that we have to remove in order to see the led lights, they are such a hassle. When putting the white sheets back, can we just use double sided tape?
My LG went out last weekend. Having to use an old box tv until I can get a new one. Only way I can watch the LG is to turn it off, then turn it back on. You can see the picture for 5-10 seconds before the screen goes black. The volume still works & you can still change the channel. Just no pic longer that a few seconds.
J have the 39 inch model of this tv, occasionally the backlight comes on and stays on but then after a period of time it goes off again. Do you think it could be the power board?
hello, i have a lg47lb6300 tv with cracked monitor ... but i just find a display of the model "6500" will it be compatible?
Maybe a silly question, but I'm not an electrician. I wanna open my LED tv but I don't know if there's an electric shock hazard when you open one of this like with CRT tvs or no? Thanks.
Yes there is an electric shock hazard with the power supply board. The capacitors can hold power for a long time.
I tell about it in the video by the way.
Does anyone know how to remove the black and white rail linking cables. The plugs look like they are permanently fixed.
My Lg 42LA65V-ZE tv is working good for some days but it turns on and off by itself randomly what shall i do ?
Would it be possible to do a continuity test on the back-lights as I don't have a voltage meter.
My TV is having the same problem and after watching this video it doesn't pay to go through this work plus my TV is turning on off by itself so I'm guessing it's the motherboard so it's definitely not worth all that trouble and frustration to just end up throwing it away anyway!
I HAVE SAME MODEL SIR CAN I ASK TO YOU ABOUT T-CON BOARD HOW TO REPAIR?
The problem with my tv is all my leds are flashing at same brightness and none are out so could it be something else??
It could be the power supply board I think. I would check the diodes and the capa. Be carefull of high voltage.
Thankyou!
Great video, unfortunately these LG models are almost certain to have this same problem.
To Pierre Boyer.
hey bud, I have an LG 43 in. That backlights when turning on the set flashes and goes off and look like it's a backlight issue but it is not a back light issue bc all the backlights turn on when checked w a backlight tester. Actually, when I got the T.V. set it worked fine. Only problem was when I cut the T.V. on 3 lines would show on the left side of the screen. Anyway, I opened up the set to clean the screen panels, the boards and the entire inside. I assembled everything back together and it turned on, the lines was still there as expected. I took the set down stairs to the play room to use for P.S.System and the set would not turn on, just the flash of the backlights and that is all. Would you be able to help me w what the problem may be? Thank You, my brother!
If all the LED are ok when tested then it probably means the problem comes from the LED power supply. Which is usually on the main power supply PCB.
Well done - explains a lot and most useful. Keep up the good work and thanks
Excelente trabajo
Hi. After 5 to 20 minutes my Viewsonic LCD starst to blink/flicker. Should I replace all the capacitors? There's about 9 capacitors (electrolytic).
Thank you.
God bless, Proverbs 31
Thanks. Will try that.
Thanks it was really helpful,big thumbs up
Most important lesson learnt from this video is to never get your shits in the wrong order!
One bad problem led backlight LG TV olds, after change kit backlight, Power supply driver LEDs circuit , neeed replace Power supply original LG, Little expensive buy
I Have Same Problem On LG 32 inch tv
I check LED Voltage Supply PCB Output Voltage It's Very Constantly Please Give me solution on this issue Whate I want to do Chack LED Like You Or Have any other Solution
Tres bon video, mon LG a la meme probleme.. :( .. Merci.
I have the same problem lg42lb5610-tc but tv on no sounds please help me
How did you know that each LED is 6 volt? From service manual? If i dont have the manual how can i know?
I tried to apply voltage directly on the LED. Starting with lower voltage. I applied voltage on a 4 LED strip, so I started with 12V, then increased until the LED turned on.
Hi friend what is the specifications of the leds used. I see it is cool white, but is it 5000k?
my TV 19inc when you on it the light comes and goes off but you will be able to see the picture is it the invert or the mother board.
Hello There,
What Causes these Strips or Single Diodes to burn out? Especially in So Short of Time, Like a year or 2 Usually?
Also if i replace the strips is it Likely They will they burn out again in the same amount of time has the 1st time?
I Also would like to fix the Issue that is causes the (Strips or Single Diodes) to burn out in the first place, So I Dont Have To Replace So Often.
Really Would Appreciate Any Tips or Ideas u Guys Could Share!
Working on a -----> TCL 65S401TKAA 65" 4K Ultra HD Roku Smart LED HDTV
Thanks Alot in Advance For Your Time!!!
Roy Boy I am not sure. It's probably the hardware design of the power supply. Or the led components that have short lifespan.
The TV I fixed just had the issue again after 1 year...
For some TVs turn down the LED brightness setting if it’s at 100% by default. Some of come with setting at 100% automatically I think, burns out faster. Could be a faulty cable giving too much power to the strips burning them out quicker. Or maybe LG are just trolls
Plz tell me what's this problem in the video with LG
Nice practical video shown.Keep it up.Thanks.I am from Aurangabad,India.
This kind of repair is only temporary because the board around the LED is permanently damaged and the heat from the LEDs will not be removed correctly.
You mean the strip PCB? Why do you say it's damaged? Obviously you heat it up, but that is not removing the copper or anything?
Danke schön! Schade, das keine Video für LEDs Lötung gibts.
I followed ur steps and the panel craked cause i assembled it the same way u did when disassembled the back from panel..i tried to put the back top of the panel and it cracked immediately
The right way to do it is to get the panel off the back of tv
@@AB-qv5oc no, you take the panel off from the front , using suction cups for glass... and put it back on the top into the grooves , so you dont crack the screen
Hi could you please post the type of led you ordered ?
Sir I have lg monitor E 2040 TO
it has now vertical line I want to remove Please. suggest
Le bon Franglish ;) Autrement, disais tu que tu n'avais pas trouvé de LED en 6 volts sur internet, si j'ai ben compris? Vidéo très utile, merci.
Si j'en ai trouvé mais j'ai commandé deux paquet de 3v au lieu d'un de chaque
How much to fix something like that? Mine is doing the same thing but no way I can do that work on my own, I don't want to burn the house lol
You need to find a local repair shop, I would guess it will be something like $100-200 ? I'm not sure though, it depends a lot on the country.
We have the same prob
I did change my led strips and even the power board and it still gives the flashlight light.
Did you ever figure this out or did you just get a new one?
disconnect the Motherboard PWM line to the PSU ... and the backlight will be stuck on full power...
Thank you very much for your help
Great info thank you
Nice repair!
que modelo de led es, o caracteristicas del led que has instalado
Bonne travail corriger défaut diodes sous - éclairage LCD poste de télévision. Tiens bon.
Yea, I have that same problem, i'll probably just have it disposed of properly and get a new TV.
How do you test the T-CON bord on this TV ?
good job
Thanks for the video. It would have been nice seeing you changing the LED ( eventhough there are othe videos dedicated to this)
Pas mal 😉, continuez comme ça ! 😃
Les systèmes Ayouye , bah... Aille ouille ! 😲 😂
Aoyue est très bon niveau station de soudage CMS, surtout celle avec pane et corps chauffant céramique intégré. Oui, c'est des copie de Bakku, mais pour m'en servir depuis plus de 10 ans, je t'assure que c'est très bon et très solide. J'ai essayé de la station Weller spécial CMS, c'est de la merde à coté. Ca chauffe pas sur de la pane crayon ou biseau de 0.1... Aucun soucis pour faire du recyclage de led CMS de 0.3 mm de large par exemple et pour dessouder à 180°, voir 160° seulement. Ce qui est super pour de la LED. Avec du Weller qui date des années 1970 en conception, tu peux éventuellement t'en servir en pied de biche à coté. EN plus, ca chauffe en 5 secondes, fer éteint au préalable.... 20 euros la pane... Çà pique. Mais, étrangement, comparé à du Weller, bha...Les panes ne s'usent pas, même avec de la soudure enrichie en plomb. C'est ce modèle de pane là et c'est 20$ pièce. Soit 160 euros le kit qui suit. www.alibaba.com/product-detail/Soldering-Station-Tips-AOYUE-Lead-Free_2001439072.html
C'est loin d’être du low cost! Pour ce modèle, en tous cas. J'en ai testé un paquet et c'est toute de la merde à coté de ça. Sauf Bakku, comme dit plus haut.
All Led backlite available
The tool you use to pass current through the LED strip, what is it called?
laboratory power supply
How did you know that each LED is 6 volt? From service manual? If i dont have the manual how can i know?
check capacitor first!?
i had a cheap monitor i got for free. i found a bulging capacitor and replaced it with a similar voltage and micro farad and it works fine now, albeit a bit dim. the back light did not work at all initially on this monitor, if you put a light right up to the screen you could sort of see something was actually bieng displayed on the screen, otherwise it was just black.
www.walmart.com/ip/Onn-32-1920x1080-HDMI-VGA-75hz-6-5ms-LED-Monitor/133110599
Get this one then replacing the light if live in USA
same problem model number 55LS55A-5B
❤
How to find the voltage of each led?
agreed, how did he figure that out?
You do not give compleat information. I have 5 and 6 led tv and how to change only 1 led.
Thanks, helped me fix my 42in LG
Thanks man toooop viedo
You are a genius!!!!!
Nice sir thanks for sharing New subscriber here Shout out
Were can you find the insulation material that you took of at 7:47 in the video?? Do need it when putting the tv back??
I Have same problem on LG flat sreen tv.be careful before you buy
Hey please help me about my tv
nice tutorial, thanks for video.
Good
I had that same thing happen when I plugged in my TV and the TV repair guy said it was the motherboard.
It can be the power supply board. Motherboard I doubt it. But not impossible.
What voltage rate you used to test the LEDs??
24v
Could you help with my tv?
Salut,
Est ce que tu as un lien facebook pour te contacter? Merci
If I took the time out to do a job like this, the least I could have done would have been to put an image up on the display to see the final result. I would also have tested the new LED in line with the rest and shown that. Disappointing,
Appears to be a tedious job, congrats.
Good job.
Bro what is the problem if the image flickering?
Can u do it for me 😁
6:49 The What?????? LOL