Thank you for all of your vids. I'm on my 5th TV fixing. Found them all in the garbage. Selling them on craigslist. Making a small profit and helping the environment, even if it's a little bit.
Great video man! I'm an electronics technician myself and that's a great solution to apply the necessary voltage with "low current" to test the led strips! I'm actually getting ready to troubleshoot a Samsumg Smart TV that has a brightness issue and this a great video if you don't have a variable power supply or led tester. So, thanks for posting this video man! God bless.
@@TECHIELIFE Yeah absolutely! It's a Samsung UN40EH5300. I've also got a cool idea for you if you ever need it. I've used a 9v battery before with a set of alligator clips as a long range continuity tester. You just clip the two sets in half, solder or wrap two leads to the battery and get a small DC piezoelectric buzzer and solder or wrap the other two leads to that. Boom. Instant long range continuity tester!
@@TECHIELIFE Yeah I used to work at a tv station and multimeter leads just weren't long enough when running and terminating audio wire from one room to another.
Hell is this a cool solution! I salute you, you saved my day! Instead of buying a power supply for 100 bucks or paying a professional I just checked the screen backlight with literally zero effort in no time. Thank you!
Nice tip!!! Bout to use this method right now, so it looks like all the fire alarms in my house are gonna be without batteries because that is the only place I can think of these kind of batteries on hand lol
Thanks very helpful tip with the 9 volt batteries and the very clear explanation, my cheap Samsung led tv went out yesterday and with the help of TH-cam I'm trying to fix it, if only something to do, and the video just saved me so money 💰 😀
I was thinking of this but didn't put enough batteries together... I could not find any info on the web about the voltage.. but you came thru... I'm a scrapper, i'll use these in my camper now.. they are too cool! thank you !!!
great idea..i just used a 12v ac adapter and strip the end off and it works fine for doing 1 strip at a time and just do each strip ...i like your 9v method too....i also do what you did by jumpering the bad led..it wont really matter..you wouldnt notice it...
i dont mean to be off topic but does any of you know of a way to log back into an instagram account? I somehow forgot my login password. I love any help you can offer me.
Great video! I was considering to buy a tester with priority shipping but this will definitely save time and money to fix an old Vizio TV with backlight problems. I’ll still get the tester but it can get here whenever, now. Thanks for the bonus trick with the bridged LED solder. Considering I am fixing an old TV, I rather spend towards a new one once this one is not worth fixing anymore.
you are pretty good i but i would recommend putting the smartphone on a tripod so we dont get our heads spinngin by the constant moving of the phonej. but what an awesome idea
Good idea. I used an 18v cordless drill battery on my 55 inch Hitachi 10 LED strip (they come apart into 2 strips, I tested half a strip, 5, at a time) and it worked great. I found out I have 2 left side strips that are out. Found some on eBay for $12 each. Not spending $70 on replacing every LED. This video saved me a lot of money, and/or saved my TV from the landfill.
Would there be no worry here that the 18v might fry some of the working strips since they require 15v or is the 3v fairly negligible there? I'm having the same problem and only have an 18v cordless drill battery to hand.
Adam Lane i wouldn't go no more than 3.5 volts for each LED.. and only test really fast dont leave the battery touching very long. now some leds may actually be able to run 6v each.. but by then, you will see that it will be dim when you test it out.
@@TECHIELIFE Do You Think I could use a 20 Volt drill battery to test My LEDs right where the LEDs plug into the power board, to see if my LED's/back-light are working? After unplugging the board of course. How Many Mh do you think the Drill battery is? I don't have any resistors to add in the circuit.
@@mrbreezeet1 at 20v..i woulddnt go any less than 7 leds anything below that could damage it. typically a full charged battery cand range a bit over 20V so if you get 21V divide by 3V needed for each led, it gives you 7. you can do 8 and more, but it will get dimmer.
Quick easy question? I got two brand new power supplies and led output for the backlight is 130v roughly on led pair 1 and 0vokts on led pair two off these boards. Am I correct in assuming these parts I bought are bad? It mentions 89v on #4 on the voltage tag on the board. So I my mind these are defective. It does it without led connected and without motherboard connected and I have tryed with it hooked up...
So you're saying if there's one bad light that if it's removed the tv will function? I was thinking I had to replace it. I know my 65 inch insignia has a backlight problem but I haven't disassembled it yet. Was thinking I needed a lot of stuff to solder, heat, whatever flux is, etc.
@@MyBigThing2010 yeah I fixed my TV last yr or maybe the yr before. Lots of people give those TV's away and the repair isn't that bad. I even had a shop tell me it wasn't worth repairing which tells me how sorry some "specialists" are.
Fantastic video. I have a very similar LG that I will be opening up next weekend. Tried a repair on a Samsung glass screened LCD some time ago but made me sick how stubborn the holdings of Samsung were. LG seems easier to strip down to expose the LEDs. I will be trying your battery trick for sure.
Hi.....how did u bead or solder the strip where there is missing LED. I live in small town where no TV parts are sold and my TV display went black today only sound. Luckily i have an old tube TV to go on with my life lol. Gona be a while before i can get a replacement strip
You can also use your phone charger + usb to test them , basically cut the usb cable you'll have 4 wires use the black and red as positive and negative. And job done
@Sam S I don’t understand the point you’re making on how it’s a bad idea to do this. How are they fundamentally different at all, it seems like the same thing to me? It kinda seems like your point is, that it would be bad if, while you were connecting the wires to the backlights, the voltage happened the vary. But you say yourself that the voltage is constant, and the phone itself regulates it, so without the phone in the picture there would be no need to worry about the voltage varying
Tnk, for the help, just one question, my led strips are made with 14 leds, could work with 9x3 battery or I need to increase the number of the batteries? Tv Samsung ue55ju6800. Tnk in advance.
Fantastic, can in ask, i have only 8 led in my strips, is 27v to much? Would using less like 12v still light them up but more faint? As in enough to know which led is not working?
This method might work, but I would not recommend it. If you want to use a battery to check LEDs, use two AA, C, or D batteries instead of a 9-volt triple pack. With the 27 volts that are produced with three 9-volt batteries, if the string you are testing has only 5 good LEDs working, you will be supplying them with nearly twice the required voltage, which will blow them out. If you use two AA batteries in series, you will have a 3-volt tester, and you can check each 3.2 volt LED at a time, without fear of blowing the LED. The BEST method of testing LEDs is with the variable voltage LED tester that is sold EVERYWHERE. Made in China, and you can find them from about $20 to $60. I got mine from Amazon for $23 including tax. It will check a single LED or an entire string of up to 100. It varies the voltage as required.
Great trick, my first strip is completely burned out, and the rest are connected in series behind it, so no backlight. I think I must have the 6v lights in my LG, I needed ~50v to get them to light.
Hey man, this video really helped me to better understand what should I do, but can you help me which one should I buy for my LG 32LA620S-ZA ? 3 or 6 volts?
Hmm. I'm not sure.. depends if it lights up with 3 volts. Amd if it comes on full brightness. If it doesn't, then it probably a 6 volt. I will be doing a video later on today on how to test it.
Thank you so much for this. It worked for me. The middle led strip in my Samsung tv isn't lighting up. This has saved me so much money because now I don't have to buy a new tv 😁.
could I possibly use a buck converter? I have 8 led per row and a hp printer power (internal )supply is 29.v Ive ran my sound bar and other thing off it. there $3.00 e-bay.. thanks
are you always online? can i use per piece universal led strip on my samsung tv with my stock led driver? i order it online.. it is 3v. it is 1 bulb that can be soldered in series.. can i use this?? i've already ordered it online.. i hope your online..
can you add me through messenger? my name is Jeff Pallarca Gimeno. i am really grateful if you let me help me on my tv.. i will send the picture and link..
Just been stripping ours down if goes well will e my third tv repair success plus 1 that's an almost fix (sound plus tv comes on (didnt before ) but still no pic ) first fix was a 37inch samsung lcd and being used as I type lol which only needed capacitors (£5) anyway almost to the nitty gritty of getting to lcd's (these ove not yet ever done ) I have a supplier who has them but there are 2 arrays so need to check which ones are needed it's a Phillip's 49put4900 model there was a an upper and lower dark patch that was only noticable on certain dark screen picture I have no lcd tester have u a link for your tester ? Are the cheap £10 ones on ebay any good ? And did u test the side ones that you mentioned? Thanks good video
If I wish to replace individual LED in any of the strip, what is the type of LED I should buy from the market? 5050 or 3528 or what? Can you pls advise? Three battery pack for testing strips is really interesting. Thank you.
so i have samsung un60j6200af and it has two seperate led wires one set grey/black and anouther grey/black when i use the 9v battery test it lit one of them but other set of wires nothing happen.. so im hoping even though its a job its just the leds.. shopjimmy has kit with suction cups for 12strips 100$
Amazing video very impressive just had a quick question so if I do this I can touch and test any of the LEDs one at a time? Anywhere on the board except for the middle connectors? Because the middle connectors will send voltage to the entire strip? But if you touch one 3 volt with the 27 volt wouldnt that blow the single led as well? I want to try this on mine ASAP because I'm waiting for LEDs to come in the mail so if you could find the time to get back to me that would be great thank you
New subscriber. Nice work. Can you help me with my Polaroid tv? Model tlx 042-40b. Have standby and power lights,no picture. Inverters look good,think it's a blown cap on power supply.
I've got to replace the LED backlights on my 5yr old 65" Philip's PFH5250/96 as the LEDs have gone dim on 1 side :) not looking forward to this to be honest. Nobody seems to have taken this model apart on YT :(
Very informative broham thankx for the tech knowledge...wanna fix my girlfriend's lg 50 inch got it stripped down to the backlights but couldn't figure out how to test for the bad led but now .....good head is coming my way....lmao..stay blessed man
I did same with 3V button cells... Kinda sick,but working. :D But the problem is,all the LEDs working fine,but for some reason,the top 4 row of the strips not even light up at startup. The bottom 3 row driven by the second pair,works fine. Any ideas?
@@TECHIELIFE 55LN575S-ZE. When i turn it on,the voltage jumps up over 200volts on both positive,then when the backlight shut down,i measure stable 85volts on them.
Thank You Can I use the three battery set up to test it right where the LEDs plug into the power board, to see if my LED's/back-light are working? After unplugging the board of course. How Many Mh do you think that is? I just don't want to Fry my LED's if they are good. I take it a 20 volt Drill battery is too many Mh's correct?
Question. If I wanted to test half of my led light without taking tv apart. Could I use a car or marine battery to check from back side of tv where it plugs into the power supply? Car battery being 12 volt and marine maybe 24. Or somehow would it pull to many amps and blow them? Thanks
My master Philips 32BLD4012N / 62 has 2 LED bars on the TV, there are 6 LEDs on the bar. There is no sound, there was no image, I changed the LEDs, they did not light. There is 13 v electricity to the sockets but it does not light up. I wonder why
Although I ordered a product that looks exactly the same, the product that is the same as the TV model but the input socket and the codes on it have been sent warn. The original is K320WDC1 A1 and the product sent with a socket at the end writes K320WDX A2 and the middle socket makes a difference.
I have a Vizio e50-e3 I tested the backlights with the 3/9V and out of the 4 rows of 10. The ones on the outside; only the first half goes on. The 2 rows in the inside do the same but on the opposite side of the strip. Is it a coincidence? Is there something that I'm doing wrong or missing? Each strip has 4 dots 2+ and 2- (extra info just in case) Any suggestions? Gracias
@@TECHIELIFE Thank you very much! Yes, two sets were off. But now that I took it apart I notice a crack in the black screen! F@%&@ piece of S@&#@. Don't know what to do with it now! Sell the boards or buy the black screen? Great day and THANKS A LOT, AMIGO! Great job!
My TCL 65S401 went dark last night. The sound and picture are there (flashlight test). Would all of the LEDs go out at once or would it more likely be the power board?
My TCL C2 65" went black last night too, I think the new update is messing up something on board, because 2 more of my friends had the same problem few days ago. Thankfully its in warranty so its going tomorrow for repair.
Receptionist at an authorized LG tv and appliance repair shop in Ohio said the whole panel on the TV needs replaced if some of the leds are out. And it costs $500-$1,000. Is this true? Lol. I though you can just replace a strip of the leds.
It's true that it could cost that much. But it's something that you may be able to do yourself if you are very careful. This is a kind of hard task to do. But the principle is easy. They Normally will replace the whole panel because this way it's an easier and faster job to do and will pass the bill to the consumer.
So when you had the camera close to the led strip to show where to make the connections did the entire strip light up all the way across? my 60" is only lighting one strip and not the one connected to it. but if I test each strip individually all led's work . Heres the deal, when I plug in the tv the back lights continuously blink in sequence with the stby. light until unplugged, it will not show a picture or turn off. All but the bottom strips blink. When I disconnect the back light plug from the power supply the tv turns on, stays on and turns off correctly.
I got a Sharp 50’ and the backlight stopped working.(I still have sound and did that flashlight test) I ordered a T-Con board to see if that was the problem but there’s still no backlight. What do you think is the problem. Power supply maybe?
depends on the model number. in many many cases, the LEDS tend to give out before the power supply does, unless it is struck by lightning or a power surge. of courser replacing the power supply is easier than the leds, but if you want to be for sure, you need to measure voltage coming out of the power board.
Ok I have a Vizio model E470i-A0. Looks to be the same one you're working on. The led connection port has 4 test points the they are as followed. Led1-, Led1+, Led2- and Led2+. At each positive Led1+ and 2+ I am only getting a voltage of exactly 68v does that mean the power supply board needs replaced? I did the flashlight test there is an image and sound but no backlight. I dont want to go any further by testing each strip yet. Please let me know as soon as possible thank you.
I have a TV (Haier) that the leds keep burning out on it. We've soldered on new replacement leds 3 times. One led for each time. But they keep burning out. Is there something wrong with the power supply or could it be the leds are just trash? Could I just swap out the strips with different ones from a better brand TV?
@@javisolis2568 I would probably say either the LEDs are junk in general.. or there the LEDs are burning out because of too much current. I would check the brightness setting to make sure that it's not in 100 percent.
@@TECHIELIFE I did take a reading from the power supply and it read at about 300-310v. I currently have it all taken apart so I can really check the brightness setting at the moment.
I have a LG 55in when I turn the TV on the LG logo comes on then the screen go black I have sound but when I shine a flashlight on screen I can see a picture what can do this thanks god bless
You most like have bad LEDs..(or maybe one bad led for that matter) I'd try to replace them if you are savy. If not just sell it for about 50-80 bucks.
40L310U Toshiba LED i just picked up lights up for about 30 seconds until it gives out. When I flash the light I still get picture just fine. Would I even need to pull it apart if all the LEDS seem to work - if only temporarily?
What is the meaning of one strip says R1 and follows the other strip that says L1. What is the deal with that. Can one unhook say the L1 and light up the R1 or just cut off some of them ( being hooked up in series, probably not) to shorter the strip just for the purpose of sticking them somewhere and use them for fun? Dang I didn't realize that you have supply them with so much voltage.
Thanks for sharing this video, I replaced the led bulb and all the leds were working, when i put the led strip back, As soon i connected the led connector same led bulb blow again. Do u think something wrong with power supply? Can u kindly help me with this. Thank u.
Just bought a sound no picture 50LN5100, figured replacing a few caps be no problem. Came home and realize on LED TV its more likely the LEDs go out then the PSU. I watched a whole bunch of these videos and I have 2 questions. Why not use LED Strip you can buy on ebay, the 16 foot 300 or 600? they use the same 3528 LED. So second question arises How much voltage is actually coming from the PSU in that pair of voltages? Thank you
Christopher Parker you kind of answered your one question. But to Clarify, the LEDs sold on eBay are wired in parallel circuit. Meanwhile, most led TV's will be wired in series. Which is why the whole strip goes out and not just one (in some cases)
How do you know which LEDs to get for your TV? I can't find the strips for my TV anywhere so I was planning on replacing the individual LEDs but I have no idea how to find the correct voltage or color for my TV. Are they all 3v LEDs?
That video just shows how you can get the strips and how you can test them for broken LEDs. It doesn't dive into how to test what an individual LED uses for power, what type of LED it is, or how to determine the correct color LED to get. I have an Element TV (ELEFT502). If you guys can help me out that'd be great!
Hello, My remote control for a Samsung TV Model # UN50H5203AFXZA stopped working, so I changed the batteries, tried a brand new remote, and then used the jog switch to manually turn on and off the TV. I accidentally, locked the panel key and now I can NOT use the jog switch to control the TV. Is there a way to unlock the TV and reset it without using a remote? TV is only 3.5 years old and I lost my job so I am trying to fix this by myself-Thanks
You can but it has to be very careful. You would need to know the voltages from the strip. Just in case you don't burn them out . Better yet look up how many LEDs it has per strip on shopjimmy.com
Thank you for all of your vids. I'm on my 5th TV fixing. Found them all in the garbage. Selling them on craigslist. Making a small profit and helping the environment, even if it's a little bit.
That's awesome! Keep it going!
repaired a free 4k 55" toshiba with this man, thank you so much
Great video man! I'm an electronics technician myself and that's a great solution to apply the necessary voltage with "low current" to test the led strips! I'm actually getting ready to troubleshoot a Samsumg Smart TV that has a brightness issue and this a great video if you don't have a variable power supply or led tester. So, thanks for posting this video man! God bless.
Thanks chris, for the comment. let me know if you need any help. BTW what model number do you have?
@@TECHIELIFE Yeah absolutely! It's a Samsung UN40EH5300. I've also got a cool idea for you if you ever need it. I've used a 9v battery before with a set of alligator clips as a long range continuity tester. You just clip the two sets in half, solder or wrap two leads to the battery and get a small DC piezoelectric buzzer and solder or wrap the other two leads to that. Boom. Instant long range continuity tester!
@@MrCcarter7 neat idea.
@@TECHIELIFE Yeah I used to work at a tv station and multimeter leads just weren't long enough when running and terminating audio wire from one room to another.
Hell is this a cool solution!
I salute you, you saved my day!
Instead of buying a power supply for 100 bucks or paying a professional I just checked the screen backlight with literally zero effort in no time.
Thank you!
Thanks!
Nice tip!!! Bout to use this method right now, so it looks like all the fire alarms in my house are gonna be without batteries because that is the only place I can think of these kind of batteries on hand lol
Super creative, quick-and-dirty solution! Love it! Definitely gonna try this out with TV I found.
Very nice DYI tester, tested all of my strips found the problem very fast, thank you. :)
Thanks very helpful tip with the 9 volt batteries and the very clear explanation, my cheap Samsung led tv went out yesterday and with the help of TH-cam I'm trying to fix it, if only something to do, and the video just saved me so money 💰 😀
I was thinking of this but didn't put enough batteries together... I could not find any info on the web about the voltage.. but you came thru... I'm a scrapper, i'll use these in my camper now.. they are too cool! thank you !!!
Awesome glad I could help!.
I love battery sequence I never thought of connecting them that way
Awesome job! I had watched 4 videos before yours and yours was better than all 4 Combined
Thanks for the feedback!
great idea..i just used a 12v ac adapter and strip the end off and it works fine for doing 1 strip at a time and just do each strip ...i like your 9v method too....i also do what you did by jumpering the bad led..it wont really matter..you wouldnt notice it...
Very nice job . We have this kind of led strips tester .
Works wonders.
Love the 9v battery stacking trick, the MacGyver is strong in you. :-)
i dont mean to be off topic but does any of you know of a way to log back into an instagram account?
I somehow forgot my login password. I love any help you can offer me.
@Nikolai Maximus Instablaster =)
Great video! I was considering to buy a tester with priority shipping but this will definitely save time and money to fix an old Vizio TV with backlight problems. I’ll still get the tester but it can get here whenever, now. Thanks for the bonus trick with the bridged LED solder. Considering I am fixing an old TV, I rather spend towards a new one once this one is not worth fixing anymore.
you are pretty good i but i would recommend putting the smartphone on a tripod so we dont get our heads spinngin by the constant moving of the phonej. but what an awesome idea
Superb idea .thankyou has helped loads.
Great idea and thanks. I used a pair of AA's and some really sharp probes to test one led at a time. Finds the problem child each time.
Thanks for this. Tip worked well. We actually had two led out on one strip.
Well done.
Good idea. I used an 18v cordless drill battery on my 55 inch Hitachi 10 LED strip (they come apart into 2 strips, I tested half a strip, 5, at a time) and it worked great. I found out I have 2 left side strips that are out. Found some on eBay for $12 each. Not spending $70 on replacing every LED. This video saved me a lot of money, and/or saved my TV from the landfill.
thanks a lot for the info. yes you could have wasted more money, but good thing you had the knowledge to fix it. Thanks for watching!
Would there be no worry here that the 18v might fry some of the working strips since they require 15v or is the 3v fairly negligible there? I'm having the same problem and only have an 18v cordless drill battery to hand.
Adam Lane i wouldn't go no more than 3.5 volts for each LED.. and only test really fast dont leave the battery touching very long. now some leds may actually be able to run 6v each.. but by then, you will see that it will be dim when you test it out.
@@TECHIELIFE Do You Think I could use a 20 Volt drill battery to test My LEDs right where the LEDs plug into the power board, to see if my LED's/back-light are working? After unplugging the board of course. How Many Mh do you think the Drill battery is? I don't have any resistors to add in the circuit.
@@mrbreezeet1 at 20v..i woulddnt go any less than 7 leds anything below that could damage it. typically a full charged battery cand range a bit over 20V so if you get 21V divide by 3V needed for each led, it gives you 7. you can do 8 and more, but it will get dimmer.
if the orignal LED is 3v is buying a replacement 6v ideal, so that the LED wont reach the max power and burn out, its just a question
No, you want another 3v.. if you purchase a 6v, the other leds will become very dimmer and that one led will be brighter.
Hi i have a 48 tv and i want to test the led. My tv has 11 led at the row how many battery i need? Thanks
Thanks u you've teach me something today i wanted to knw along time now.
Quick easy question? I got two brand new power supplies and led output for the backlight is 130v roughly on led pair 1 and 0vokts on led pair two off these boards. Am I correct in assuming these parts I bought are bad? It mentions 89v on #4 on the voltage tag on the board. So I my mind these are defective. It does it without led connected and without motherboard connected and I have tryed with it hooked up...
I told you that you was a genius!! The battery method worked!! You da man!!
khumello glad to see you got it.
Great tips. Thank you
So you're saying if there's one bad light that if it's removed the tv will function? I was thinking I had to replace it. I know my 65 inch insignia has a backlight problem but I haven't disassembled it yet. Was thinking I needed a lot of stuff to solder, heat, whatever flux is, etc.
If you don't already have all that stuff it would be cheaper just to order a new led strip kit
@@MyBigThing2010 yeah I fixed my TV last yr or maybe the yr before. Lots of people give those TV's away and the repair isn't that bad. I even had a shop tell me it wasn't worth repairing which tells me how sorry some "specialists" are.
Fantastic video. I have a very similar LG that I will be opening up next weekend. Tried a repair on a Samsung glass screened LCD some time ago but made me sick how stubborn the holdings of Samsung were. LG seems easier to strip down to expose the LEDs. I will be trying your battery trick for sure.
Did it work for you?
@@j.lietka9406 yes, worked perfectly. Total cost of repair (batteries, replacement LEDs) $15
@@RogueLegend999 very good!! Thank you for your reply! 🤓
Hi.....how did u bead or solder the strip where there is missing LED. I live in small town where no TV parts are sold and my TV display went black today only sound. Luckily i have an old tube TV to go on with my life lol. Gona be a while before i can get a replacement strip
Place a small piece of copper. And it should bridge it
@@TECHIELIFE thanks will try that today
You can also use your phone charger + usb to test them , basically cut the usb cable you'll have 4 wires use the black and red as positive and negative. And job done
@Sam S I don’t understand the point you’re making on how it’s a bad idea to do this. How are they fundamentally different at all, it seems like the same thing to me? It kinda seems like your point is, that it would be bad if, while you were connecting the wires to the backlights, the voltage happened the vary. But you say yourself that the voltage is constant, and the phone itself regulates it, so without the phone in the picture there would be no need to worry about the voltage varying
Tnk, for the help, just one question, my led strips are made with 14 leds, could work with 9x3 battery or I need to increase the number of the batteries? Tv Samsung ue55ju6800. Tnk in advance.
Let's just say, under voltage is safer than over voltage.. these leds will be damaged if you go over
Fantastic, can in ask, i have only 8 led in my strips, is 27v to much? Would using less like 12v still light them up but more faint? As in enough to know which led is not working?
I would only use about 20v
@@TECHIELIFE Would 18v work as in 2 of those 9v batts or would 18 not be enough to light them?
My sony 55 is super dim. I'm guessing it needs some replaced. Will this process work for the sony
Depends on the model, but yes it should
This method might work, but I would not recommend it. If you want to use a battery to check LEDs, use two AA, C, or D batteries instead of a 9-volt triple pack. With the 27 volts that are produced with three 9-volt batteries, if the string you are testing has only 5 good LEDs working, you will be supplying them with nearly twice the required voltage, which will blow them out. If you use two AA batteries in series, you will have a 3-volt tester, and you can check each 3.2 volt LED at a time, without fear of blowing the LED.
The BEST method of testing LEDs is with the variable voltage LED tester that is sold EVERYWHERE. Made in China, and you can find them from about $20 to $60. I got mine from Amazon for $23 including tax. It will check a single LED or an entire string of up to 100. It varies the voltage as required.
Excellent work bro
Hi, let me know total led how many ohms between B+ to ground....? please give your feedback...thank you
Great trick, my first strip is completely burned out, and the rest are connected in series behind it, so no backlight. I think I must have the 6v lights in my LG, I needed ~50v to get them to light.
Thanks man! Had my Hisense go out and found a blown strip. DONE. Wanted to test them all instead of just that one to be safe.
Thanks for watching. I'm glad it helped out.
@@TECHIELIFE did it last night. Worked perfectly!
well done. now just replace and should be back up. just remember to lower the brightness a bit this time.. Thanks for watching and please subscribe.
I want to buy a led back light tester but there isn't a UK version with a UK outlet... I gotta try this
I don’t have 3 batteries I’d there any other options ?
Nice video, thanks for the heads up
Hey man, this video really helped me to better understand what should I do, but can you help me which one should I buy for my LG 32LA620S-ZA ? 3 or 6 volts?
Hmm. I'm not sure.. depends if it lights up with 3 volts. Amd if it comes on full brightness. If it doesn't, then it probably a 6 volt. I will be doing a video later on today on how to test it.
When you applied the 3 x 9V tester, did the rest of the LEDs on that strip also light up? Thank you 🤓
Well it depends on the tv. If the LEDs are in connected to the rest of the LEDs, then it should turn then on.
Thank you so much for this. It worked for me. The middle led strip in my Samsung tv isn't lighting up. This has saved me so much money because now I don't have to buy a new tv 😁.
Good luck on fixing it. Please subscribe!
Hi I have question what is the voltage in your board coz mind only 79.5 volt so its ment my led are dead hehehe thanks waiting for your response
could I possibly use a buck converter? I have 8 led per row and a hp printer power (internal )supply is 29.v Ive ran my sound bar and other thing off it. there $3.00 e-bay.. thanks
are you always online? can i use per piece universal led strip on my samsung tv with my stock led driver? i order it online.. it is 3v. it is 1 bulb that can be soldered in series.. can i use this?? i've already ordered it online.. i hope your online..
Do you have the link for it and the model for your tv
can you add me through messenger? my name is Jeff Pallarca Gimeno. i am really grateful if you let me help me on my tv.. i will send the picture and link..
Just been stripping ours down if goes well will e my third tv repair success plus 1 that's an almost fix (sound plus tv comes on (didnt before ) but still no pic ) first fix was a 37inch samsung lcd and being used as I type lol which only needed capacitors (£5) anyway almost to the nitty gritty of getting to lcd's (these ove not yet ever done ) I have a supplier who has them but there are 2 arrays so need to check which ones are needed it's a Phillip's 49put4900 model there was a an upper and lower dark patch that was only noticable on certain dark screen picture I have no lcd tester have u a link for your tester ? Are the cheap £10 ones on ebay any good ? And did u test the side ones that you mentioned? Thanks good video
I have a link on the description of the video
@@TECHIELIFE my bad I'll take a look mate thanks
If I wish to replace individual LED in any of the strip, what is the type of LED I should buy from the market? 5050 or 3528 or what? Can you pls advise? Three battery pack for testing strips is really interesting. Thank you.
You honestly should measure the LED, or just try to find an identical one on eBay
so i have samsung un60j6200af and it has two seperate led wires one set grey/black and anouther grey/black when i use the 9v battery test it lit one of them but other set of wires nothing happen.. so im hoping even though its a job its just the leds.. shopjimmy has kit with suction cups for 12strips 100$
Amazing video very impressive just had a quick question so if I do this I can touch and test any of the LEDs one at a time? Anywhere on the board except for the middle connectors? Because the middle connectors will send voltage to the entire strip? But if you touch one 3 volt with the 27 volt wouldnt that blow the single led as well? I want to try this on mine ASAP because I'm waiting for LEDs to come in the mail so if you could find the time to get back to me that would be great thank you
Yeah , do not try on a single led. It will damage the led.
Excellent video!
thanks
New subscriber. Nice work. Can you help me with my Polaroid tv? Model tlx 042-40b. Have standby and power lights,no picture. Inverters look good,think it's a blown cap on power supply.
Do you have voktage coming out of the power supply to the LEDs?
@@TECHIELIFE That's what I'm not sure of...where to put probes on my meter to check...should it be 5v coming out or 24v?
@@Buff_Dave_Oprtr probably the 24.
I've got to replace the LED backlights on my 5yr old 65" Philip's PFH5250/96 as the LEDs have gone dim on 1 side :) not looking forward to this to be honest. Nobody seems to have taken this model apart on YT :(
Just try to figure out which led has gone bad... Or just try to replace the whole led strip. That would be easier
Thks for the tip with using the batteries worked a treat 👌
Very informative broham thankx for the tech knowledge...wanna fix my girlfriend's lg 50 inch got it stripped down to the backlights but couldn't figure out how to test for the bad led but now .....good head is coming my way....lmao..stay blessed man
The things we do to keep a good head between the legs and pelvis 👌👌
if I wanted to light them all together from the cable that goes to the power supply, how man volt i need?
Depends on how they are wired.. but typically it would be 3volts per led.
@@TECHIELIFE 12 led each strips so 36 volt , I tested them with 4 batteries. 5 strips connected in parallel 180 volt?
@@ivanhossain5436 sound about right.
So I could use a little "wall bug" switching power supply of around 30VDC to do this, right? Or, would the voltage be too un-filtered/un-smoothed?
I don't think it needs to be filtered. The lights will get brighter as more voltage is introduced.
@@TECHIELIFE Cool. I managed to test my LED strips using a transformer from a toy railroad set.
I did same with 3V button cells... Kinda sick,but working. :D But the problem is,all the LEDs working fine,but for some reason,the top 4 row of the strips not even light up at startup. The bottom 3 row driven by the second pair,works fine. Any ideas?
Maybe it's a power supply issue. What's the model of the tv?
@@TECHIELIFE 55LN575S-ZE. When i turn it on,the voltage jumps up over 200volts on both positive,then when the backlight shut down,i measure stable 85volts on them.
@@janoskonyari3294 it's either the LEDs or the power supply, if the power supply is supplying power, then that led array may be bad.
Thank You
Can I use the three battery set up to test it right where the LEDs plug into the power board, to see if my LED's/back-light are working? After unplugging the board of course. How Many Mh do you think that is? I just don't want to Fry my LED's if they are good. I take it a 20 volt Drill battery is too many Mh's correct?
Great video and I wanted to ask what kind of wire I need like could I use wire from a USB cable
(I'm new to this so wanted to make sure)
look at my recent video clips . I used a usb cable there.
How do we replace the dead ones?
please look at my older videos. i actually do some repairs on them... although its not really for newbies.
Great tip. Made my night. Thx!
lol.. never heard that before but thanks!
Question. If I wanted to test half of my led light without taking tv apart. Could I use a car or marine battery to check from back side of tv where it plugs into the power supply? Car battery being 12 volt and marine maybe 24. Or somehow would it pull to many amps and blow them? Thanks
It's not the amps that blows them. It's the high voltage. I would just start with 12 volts. Then work your way up
@@TECHIELIFE so in all reality a car battery would work?
Yes it could.
my master samsung ue40h 6270 led 5 row led bar 4 row led bar if it works fifth or not, we can get the image.
My master Philips 32BLD4012N / 62 has 2 LED bars on the TV, there are 6 LEDs on the bar. There is no sound, there was no image, I changed the LEDs, they did not light. There is 13 v electricity to the sockets but it does not light up. I wonder why
Probably because the LEDs are bad. Did you change the LEDs or the whole strip?
Although I ordered a product that looks exactly the same, the product that is the same as the TV model but the input socket and the codes on it have been sent warn. The original is K320WDC1 A1 and the product sent with a socket at the end writes K320WDX A2 and the middle socket makes a difference.
I have my LG apart down to the LED's. How many volts DC do these strips use? Looks like 100+? 12V didn't even blink them.
Depends. Most lg LEDs will use 6v each.
So if they are in series, then just add each 6v for each led. If it doesn't blink, there could be an open in the circuit
Thanks man I like that little trick with the batteries
I have a Vizio e50-e3 I tested the backlights with the 3/9V and out of the 4 rows of 10. The ones on the outside; only the first half goes on. The 2 rows in the inside do the same but on the opposite side of the strip. Is it a coincidence? Is there something that I'm doing wrong or missing? Each strip has 4 dots 2+ and 2- (extra info just in case) Any suggestions? Gracias
Sounds like you may have some bad LEDs
@@TECHIELIFE Thank you very much! Yes, two sets were off. But now that I took it apart I notice a crack in the black screen! F@%&@ piece of S@&#@. Don't know what to do with it now! Sell the boards or buy the black screen? Great day and THANKS A LOT, AMIGO! Great job!
@@robertoayala5142 sell the boards. LCD are very hard to find and expensive
@@TECHIELIFE Diego I'll sell them to you if you need them, thanks compadre!
@@robertoayala5142 lol. Thanks but I don't have a need for them. Sell them on eBay!
My TCL 65S401 went dark last night. The sound and picture are there (flashlight test). Would all of the LEDs go out at once or would it more likely be the power board?
My TCL C2 65" went black last night too, I think the new update is messing up something on board, because 2 more of my friends had the same problem few days ago. Thankfully its in warranty so its going tomorrow for repair.
just lower the brightness down on the leds.
Receptionist at an authorized LG tv and appliance repair shop in Ohio said the whole panel on the TV needs replaced if some of the leds are out. And it costs $500-$1,000. Is this true? Lol. I though you can just replace a strip of the leds.
It's true that it could cost that much. But it's something that you may be able to do yourself if you are very careful. This is a kind of hard task to do. But the principle is easy. They Normally will replace the whole panel because this way it's an easier and faster job to do and will pass the bill to the consumer.
Do u have a video that shows how to bypass a bad led light? And what did u use to jump the light you removed?
algonzalez571 yes. I do. Look for funai black Friday TV on my videos.
Your Idea has work out.Thank you brother. God bless you.
So when you had the camera close to the led strip to show where to make the connections did the entire strip light up all the way across?
my 60" is only lighting one strip and not the one connected to it.
but if I test each strip individually all led's work .
Heres the deal, when I plug in the tv the back lights continuously blink in sequence with the stby. light until unplugged, it will not show a picture or turn off.
All but the bottom strips blink.
When I disconnect the back light plug from the power supply the tv turns on, stays on and turns off correctly.
What is the model of your TV?
Awesome thank you 👍
Thank you you rock!! I wasted 2 days on this T.V ! So thanks alot !
This was VERY helpful! Thank you!
For that i think we gona use car battry...which is better
I got a Sharp 50’ and the backlight stopped working.(I still have sound and did that flashlight test) I ordered a T-Con board to see if that was the problem but there’s still no backlight. What do you think is the problem. Power supply maybe?
depends on the model number. in many many cases, the LEDS tend to give out before the power supply does, unless it is struck by lightning or a power surge. of courser replacing the power supply is easier than the leds, but if you want to be for sure, you need to measure voltage coming out of the power board.
Great tip and info 👍
Just wanted to say thank you for this video. It verified my theory for testing the LEDs in my LG 55LB5900-UV.
Mike Oleksa sure thing
Ok I have a Vizio model E470i-A0. Looks to be the same one you're working on. The led connection port has 4 test points the they are as followed. Led1-, Led1+, Led2- and Led2+. At each positive Led1+ and 2+ I am only getting a voltage of exactly 68v does that mean the power supply board needs replaced? I did the flashlight test there is an image and sound but no backlight. I dont want to go any further by testing each strip yet. Please let me know as soon as possible thank you.
I have a TV (Haier) that the leds keep burning out on it. We've soldered on new replacement leds 3 times. One led for each time. But they keep burning out. Is there something wrong with the power supply or could it be the leds are just trash? Could I just swap out the strips with different ones from a better brand TV?
Is it the same led? I wonder if you are damaging the led with high exposure if heat when soldering it. Or maybe the tv brightness setting is too high.
@@TECHIELIFE well see the interesting thing is that the ones that get replaced don't burn up. A different original one burns up each time.
@@TECHIELIFE the replacement leds came out of a vizio
@@javisolis2568 I would probably say either the LEDs are junk in general.. or there the LEDs are burning out because of too much current. I would check the brightness setting to make sure that it's not in 100 percent.
@@TECHIELIFE I did take a reading from the power supply and it read at about 300-310v. I currently have it all taken apart so I can really check the brightness setting at the moment.
How did you fixed that one LED without buying a new strip
Please look at my other clips for more info
TECHIE LIFE which one
I have a LG 55in when I turn the TV on the LG logo comes on then the screen go black I have sound but when I shine a flashlight on screen I can see a picture what can do this thanks god bless
You most like have bad LEDs..(or maybe one bad led for that matter) I'd try to replace them if you are savy. If not just sell it for about 50-80 bucks.
@@TECHIELIFE you don't think it could be the main board thanks god bless
@@cppresley7015 on lg, if you have sound, and no back lights but a faint picture, the. It's going to be the LEDs. What is the model of the TV?
@@TECHIELIFE LG 55lm6200 thanks god bless
@@TECHIELIFE model is LG 55lm6200 thanks god bless
Jvc LT-32N355 LED valtage pls
You know your stuff. Very nice. Thanks for sharing your knowledge.
40L310U Toshiba LED i just picked up lights up for about 30 seconds until it gives out. When I flash the light I still get picture just fine. Would I even need to pull it apart if all the LEDS seem to work - if only temporarily?
Hi,
Can I change the interface menu 1530 by Samsung UE48J5600AW, with another software 1290 for exemple?
Greetings Sire!
What is the meaning of one strip says R1 and follows the other strip that says L1. What is the deal with that. Can one unhook say the L1 and light up the R1 or just cut off some of them ( being hooked up in series, probably not) to shorter the strip just for the purpose of sticking them somewhere and use them for fun? Dang I didn't realize that you have supply them with so much voltage.
Thanks for sharing this video, I replaced the led bulb and all the leds were working, when i put the led strip back, As soon i connected the led connector same led bulb blow again. Do u think something wrong with power supply? Can u kindly help me with this. Thank u.
checl to see if there is a short there... but most likeley its the led.. leds dont blow unless its over driven.. try lowering your brightness.
Just bought a sound no picture 50LN5100, figured replacing a few caps be no problem. Came home and realize on LED TV its more likely the LEDs go out then the PSU. I watched a whole bunch of these videos and I have 2 questions. Why not use LED Strip you can buy on ebay, the 16 foot 300 or 600? they use the same 3528 LED. So second question arises How much voltage is actually coming from the PSU in that pair of voltages? Thank you
Christopher Parker you kind of answered your one question. But to Clarify, the LEDs sold on eBay are wired in parallel circuit. Meanwhile, most led TV's will be wired in series. Which is why the whole strip goes out and not just one (in some cases)
How do you know which LEDs to get for your TV? I can't find the strips for my TV anywhere so I was planning on replacing the individual LEDs but I have no idea how to find the correct voltage or color for my TV. Are they all 3v LEDs?
th-cam.com/video/YgaL6X6eSaU/w-d-xo.htmlm40s
That video just shows how you can get the strips and how you can test them for broken LEDs. It doesn't dive into how to test what an individual LED uses for power, what type of LED it is, or how to determine the correct color LED to get. I have an Element TV (ELEFT502). If you guys can help me out that'd be great!
Thank you for all the help and time..
Where can I buy the replacement led bulbs?
I purchase them on eBay
Hello, My remote control for a Samsung TV Model # UN50H5203AFXZA stopped working, so I changed the batteries, tried a brand new remote, and then used the jog switch to manually turn on and off the TV. I accidentally, locked the panel key and now I can NOT use the jog switch to control the TV. Is there a way to unlock the TV and reset it without using a remote? TV is only 3.5 years old and I lost my job so I am trying to fix this by myself-Thanks
Great Stuff👍.
very informative video. Thanks!!!
thanks for watching!
thanks for sharing, really saved me $$$$.
Glad to hear that!
To save some frustration, start at 2:33
Can I do this to test them before I tear it down, like test from the plug
You can but it has to be very careful. You would need to know the voltages from the strip. Just in case you don't burn them out . Better yet look up how many LEDs it has per strip on shopjimmy.com