How do we diagnose and fix a Tv backlight, Lg 32LB550B black screen repair
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- čas přidán 12. 11. 2017
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Great video. Thanks for taking the time. Most guys would have edited out the call from their wife. That was legendary leaving it in. You made my day.
For LED TVs I recommend setting the brightness at about 70% and never at max as this reduces the LEDs' lifespan. I usually replace the dead LEDs with new ones specially if there is more than one dead. Shorting the LEDs will mean that the other ones are being driven harder and they will end up failing too it's just a matter of time. Those LG LED strip connectors don't come out in the direction of the cable but perpendicularly to the strip, they come out pretty easy when you figure this out, I also struggled the first time :D I enjoy your videos, keep them coming :)
czcams.com/video/VUqslWr9f4w/video.html
That makes a lot of sense now that I see it. Sometimes you have to see the things to get the theory. I wasn't thinking about the voltage drop of the LEDs and the way they work. Thanks for explaining!!
But I know that there are some TVs that don't turn the backlight on if you short one LED because it probably senses that the voltage drop isn't right (?)
i repaired my 32LB550U by watching this.. subscribed and liked. thank you a lot
So many times you remind me myself.. get angry when things start to complicate :) but at the end you are the best !
Hi Sorin, Thanks for your videos. Today i successfully repaired my first led TV :-) Just based on your video and encouragement that it can be easily done.
quick message to thank you for this video, thanks to it I got the confidence to repair the tv, now more than ever, particularly while in quarantine, your content is appreciated, you rock! thanks!
Very good Job, very clever thoughtful. You are the Best! Thank you
Nice job bro!! I repair a 55 inch samsung led 2012 and they have smd led rail to left and right ...I guess its a crazy job but i save a lot beacause you learn to me how to open the front of lcd tv THX A LOT MAN YOURE GENIUS!!! NOTHING TO COMPARE STEVE JOB :P
Thanks I was trying to power some leds that wouldn't power for a project I'm building and couldn't figure out why. Right at the beginning you said leds are powered by current not voltage. That didn't even dawn on me I was trying everything to power them on but I could only get one on at a time. I increased the current and let there be light. Thanks again.
You did an awesome repair
Sorin, you deffinatly need a new proper work desk. To be honest, seeing you working with that tv facing down on that screen.....it gave me the chills:)). Anyways, good work as usual.
You did a good job... keep it up!
"Hello we have here a nice LG Tv it's a nice one yeah" 42 minutes later " How much they sell this rubbish" 😅
Thanks fot the vidéo, to put away the screws, I use an egg box, it's super convenient!
Le Pic'Art I thought I'll suggest something similar.
sorin dont have egg...lol :))
You should have another bigger table or desk for repairing TVs. Nice video, thanks a lot.
Thank You
hi Sorin greetings from Greece
Hello hello, that is really nice to me to see how you test and deduct ! I have exactly same trouble . So the first tests where to see if the alimentations where ok ?
With TVs it's at least all big and easier to solder. Nice job!
Change that black lead please, your life will be easier ;)
thank you for the video I have learnt a lot, may ask do you adjust the amperes when you apply voltage to leds or when you inject voltage to any part you repair
very professional to overbridge one led with a blob of solder........
That thing was a "bastard case" instead of a basket case. WOW, I'm glad you were able to beat this.
i love your channel Master.
I use a old island from a kitchen.
I put it in the center of room and able to walk all around it.
If I work on a board I take it to my bench. Works great for me
Hey Sorin, maybe you might put the Gopro on a seperate circuit from your test equipment? Perhaps there is some feedback of some sort causing it to glitch? It seems like the Gopro freezes every time you probe anything with your power supply. Hope you can get the gremlins out of it.
You are struggling with that power supply black wire... You need to get it fixed... I am also planning to get two new tables for work,... Will send you picture when i finish them.
Hello, It is very clear that this TV has a led malfunction, and there is every team that draws my attention, okey, there is no silicone gun, but it is not a permanent solution to change those leds one by one. It will be healthier to replace the led bars there with a new one as a strip. As you know, don't forget that the other leds you haven't changed are tired from working. Thanks
Is that MX-4 cooler master paste?
Wow.
hi there sorin, what did you do with the bad led? removed it or shorted it over the pads underneath? have this same issue and just want to bypass the led so the rest of the strip lights up, thankyou for everything too, very helpful man :)
I have a question about the connectors that you have on your GoPro, both HDMI and the power cables that are connected to it, do they have a filtering coil (Ferrite Bead) right at the end where they connect to the GoPro? if not, that might just be the problem with your GoPro freezing when you plug other devices to your power outlet, cheap cables that are passing spikes into the GoPro.
Best for Lense replace are Glue T7000 or Epoxi Glue , heat doesnt matter
And, it's 2020 and you said in this video wich is from 2017 that soon you will have a new desk...3 years pass'ed almost, same desk..lol:D
Thanks you for the video and sharing the knowlegde.
Hi Sorin, love your videos, have you done any videos on Samsung LED TVs that the screen diffuser glue fails ending up with rows and columns of DONUT type RINGS on the screen? especially when the screen is on a light background? Apparently you have to re glue the LEDs???
Thanks from Oz.
I fix my panasonic TV, change 3 leds and screen work again, cost me a little more than 1 Euro.
a did glue that caps with regular super glue, Locktite i belive and still holds. after 3 years a belive.
me puedes decir si los leds que cambias son de 30x30mm y de 6v ? gracias
Warum werden die Defekten LEDs nicht ersetzt ?
Magic again :)
thanks ...
the mighty Eye of Sorin.
Thank you very much for sharing!!
I have a question about you:
I have repaired the TV according to your guide. Everything was ok. TV worked fine for the next 6 months.
After that I noticed that unfortunatelly only one led bar has remain working.
Can I use aftermarket led strip in order not to buy the genuine led bars? Can I buy just the leds and replace them? aftermarket
What is your opinion?
Thanks
We love you!!
katebase to britnes sto 50 kai then tha exeis problima
Do the flashlight test on the screen, to light up the screen from the front side.
Yes this is excellent short cut to diagnosis. I also have LG TV with black screen and by shining flash light, I immedietly concluded it's LED that's broken and rest of TV is working fine.
The repalcement smd led for LG TV is extremely cheap. You can get dozens for just few dollars. As a repair shop, why not have some spare smd led on hand to repair these burned out leds? Replacing led from strip doesn't need to be complicated, just scrape off (or grind down using dremel tool) broken led and solder on replacement.
How do you source individual LED's? I'm looking to find values for an LED strip for a gaming monitor, but I can't find schematics
you need more space ...... AND a new space bar lol
I think multimeter diode mode could be used to test the leds individually without power supply connected.
Exactly that my thoughts on this
Why don't you get a voltage regulator or better quality power adapter for the Go Pro?
more tv please thenks
LUCKY GOLDSTAR, NOT SO LUCKY
Have same TV but backlight on tv is weak, if i short a middle part of led stip than all leds turned on
Good afternoon, what is best way to diagnose a faulty LG 50LA620V-ZA TV? When you plug the TV, the logo LG appears on the screen , stays for 1/2 second and goes black. I opened the back case and the LEDs are switching on for that 1/2 second! I’m not sure what can be the problem: Leds faulty, power supply unit, faulty driver? Any ideas? Many thanks!
What did you do to the broken led in the centre when you fix it? Hard to see without microscope.. thanks
shorted
Hello there, Shorted with only solder or did u apply any special wire to hang them up together!, BTW u have become my inspiration I hope some day I become like you Thanks a lot for everything your doing and showing for us^^
@@mustaphaothman7025 he soldered it just with solder, the Sorins way...
you took out the screen with the frame?
u could use Duck Tape to mend ur chair n clean up ur table for TV repairs Me think. u could always put them back again. good video educational keep them coming.am it my blind waiting 4 Canada Geese.
Sorin you need a small container to put all those screws in and keep the in one place. Don't you think so? 😀
change power supply on the go pro
when he got a shock did u see the one led light up hahahaha
i dont really get it.so when all led are fine it should measure 140 v plugged and unplugged also?
if all led are fine, you should have light. There probably its around 50-60v now
37:46 that expression was .... 😂😂
So only one led was bad and no picture at all? Is there a possibility that power supply is the issue and not the leds?
How to get electrocuted by a cheap tv 😅 😅.
The lesson of this video; no matter how hard it is, don't give up and the impossible will stay behind you.
Nice persistence !
if gange led the britnes most 50 not 100.nice video.becouse after 3 month led off again
Hello squeeze at top and lift the wire out
can we check the white led connector for continuity, or in led mode ? (I have no continuity)
Could you do a voltage injection like Sorin did in the video?
@@Mr.Smith_Mr.Wesson_andMe now I can, at the moment only ohmmetre or diode test, the results did differ every "measure" . Thank you
My LG 32lb55 there's no picture light available please help
can someone elaborate on this 100v.....140v thing Sorins on about?
Hi, " you get what you pay for ", LCD screen connector no longer has a chassis just glued like a self-adhesive :/
This TV reminds me of a program about planned obsolescence.
Te apreciez foarte mult, insa nu pot fi deacord cu aceasta tehnica. Mii de scuze.
Maybe we all should complain to your boss to make shore that you get your own office.
What glue?
Super glue?
Change the supply board
oh no why do you change not the other lamps?😀
I wonder why the manufacture didn't put just 3 or 4 LEDs if what he is doing is the case! I suppose each led has 3v so if you shorted them, that means you're giving other LEDs more stress more than 3v, so in the long run, you'll have to go back to the drawing board to fix another one. This is just a temporary fix.
Dragul meu, nu invata pe altii sa fie carpaci. Asta e LG cu leduri de 6v. Ele sunt deja suprasolicitate, o stii bine. Diferenta de tensiune va cadea pe celelalte leduri deja obosite si durata de viata va scadea. Clientul se intoarce in service, dupa cateva luni, daca foloseste tv-ul nonstop
Gopro missing a cap
Eu am scimbat ledurile arse...Dupa...am ramas si fara imagine si fara sunet...🙂
i see tv repairs today
Sorin make video at homeeeeee!!! Dont be lazy :)
pls sell that gopro and buy a another camera who not always freeze
one lins is missing
If you have at least one led in short the tv will turn off himself after a while.
The current draw is not the same.
this is the first time I see you nervous
I apologize
no need ...... I love your videos !!!!!!!!!!!!!!!!!!!!!
I actually don't blame him for being nervous - These screens are so fragile when they are removed like that. I was actually surprised there was no lines down the screen. It is incredibly easy to damage the connection to the screen (the bottom long board and jumper strip) as the connections are thinner than a human hair. It was a bold repair for sure, but ultimately successful.
You need uv glue.
Yep another rather nasty tv, the leds must be junk!!.
I really dont like power leds, they just dont last very long :-(
Try not to get stressed out about cheap crap, it is not worth worrying about.
I think the problem will repeat with in one month
i not ever going to buy a new led 4k tv, i will keep fixing my old ccfl backlit tvs, the oldest is a lg 32lx2r from 2005 720p been fixed a few times but never the ccfl backlights, ive never seen them backlights fail.. maybe the inverter power supply for lights may fail but not ccfls themselfs, i bet thats why they stopped making them.. lasted too long,
yes no need for 4K TVs, just 1080p is good enough. Replacing smd led isn't difficult and much cheaper (few bucks for dozens on ebay) than burnt out ccfl light (if you can get exact replacement).
Oh man, I could feel how much you hated this thing, funny to watch, but really, you shouldn't, it's not worth it :)
Removing the diode and joining by soldering the 2 pins is the wrong repair this work will only work for a few weeks you can buy on ebay 3 strips for this £25 and replace all
LED diode tester only cost £15 could be used to test the LEDs individually without power supply connected.
You should not just bridge out the faulty LED on the light bar like you
did, In my opinion that's bad practice and teaching bad habits.
Yes it will work for some time but If you bridge out the
faulty LED you will put additional stress on the remaining LED's and
they will blow also. You said they are current controlled there are
current mode PWM controlled. I have fixed several LED strips and its easy to
replace an individual LED once you take the screen apart. I use a small
heat plate and heat the strip from beneath to remove and replace the
faulty LED. Its a time consuming process but that's the correct way to
fix the issue or replace the complete bar. The other thing to do is turn
down the back light to about 50-70% as that will extend the life of
those LED strips.The manufactures push the LED strips to their limits
when the back light is cranked up to 100% and that will shorten the life
of those strips. The LED strips are failing even on TV's that are
within their warranty period due to the excessive stress on the back
light LED's.
Instead of hot plate, easier method is just scrape off the broken LED. Then you can clean up and solder in replacement using soldering iron. All without removing the led strip from chasis.
@@springer-qb4dv Sure that's possible, but, the problem with that technique is the heat sinking of the strip and chassis will make it difficult to get the correct temperature required to just use a soldering iron unless using a good temperature controlled iron with a tip of sufficient mass to over come the heat lost in the strip etc.
Muy mala reparacion.. Eso no se hace. Lo mejor es cambiar todos los led.. Damaciado taller tenes
You broke the screen ribbon connections to the led screen they are very fragile and its nigh on impossible to fix these cheapos without damaging something!
you need a new chair
"Electrocuted" is when you die. When you just get 'shocked,' you live to see another. I don't think you've been experiencing the former unless you are have hundreds of lives.
bad idea that the leds are wired like xmas tree lights, 100 bulbs 1 dont work, go hunt the bad bulb.....lol
Can you fix a GoPro? Just joking.
Does no good to show people how to fix things if we can't see what you are doing. Your camera function is terrible.
so, not only did you bodge the repair by not replacing the leds that were out, you left the diffuser off the shorted led so that a competent engineer couldnt do the job properly the next time! - ive watched a few of your videos now - you dont repair, you short stuff out and bypass stuff, you break stuff - do you have no pride in your work?
stop watching him . if you think he's a bad one why are you watching . idiot