While fixing broken electronics doesn't always make financial sense, it is always a nice feeling when you allow something to retain usefulness and keep it from ending up in landfill.

@ulfseidl1216

Жыл бұрын

Yes old small tvs are a good addition for the toilet or bathroom, or balcony depending on size.

@brettmiller5443

Жыл бұрын

Plasma TVs were a shitty source of RFI and we are fortunate that they are gone imho.

@mrrooter601

Жыл бұрын

@@lurch789 this

@beekeeper8474

Жыл бұрын

My family used the same TV from the day I was born. I've had to replace my TV 3 times in 5 years. Always get the extended warranty as everything made today if junk.

I would NOT want to fix TV's professionally, but to be able to fix my own (I know electronics) is a nice thing to have in mind.

@randymoyer5351

Жыл бұрын

I think CRT Tvs Were Easier, they arent as Fragile atleast, i have a few left here yet, i kept one running 30 years till its Picture tube Gave up. They run a long time otherwise I have Flatscreens now, I fixed my Dads flatscreen tv 2 times, one of mine Once, But them make me Nervous due to the screens, gotta be real careful with them. ]

@andygozzo72

Жыл бұрын

@@randymoyer5351 yep, 70s and 80s crt tvs the best for servicing, i never did it 'professionally' as a business but a 'spare' time thing for friends/family, round here most common were philips G11/KT3/K30 and CTX chassis sets, most common fault dry joints,!

@9852323

Жыл бұрын

@@andygozzo72 now all we have is smart TVs 4K and gimmicks galore. These new tvs are LOW BUILD QUALITY

@Mad_Catter_

Жыл бұрын

Modern screens are really becoming impossible to work on some of the components.

@andygozzo72

Жыл бұрын

@@9852323 component quality can also be bad, with the many ones afflicted with bad, bulging, leaking capacitors, but that afflicted a hell of a lot of other equipment

Thank you for explaining the series v.s. parallel topic. The lower amperage explanation really makes sense.

@j.f.christ8421

Жыл бұрын

Makes the driver simpler as well, you don't need to match the driver voltage to the LED voltage.

Great video. Cheers. You've prevented one piece of e-waste from entering a hole, and that's a public service regardless of the person being happy or not.

@12voltvids

Жыл бұрын

They ate happy. It's my wife's clients autistic brother. If he wasn't happy i would have heard about it.

The reason the LEDs turn blue over time is that they were actually always blue, the phosphor that makes the light appear white simply bleaches out over time

@12voltvids

Жыл бұрын

I believe i have covered that many times on videos

@MAGnetICus_Attractus

Жыл бұрын

@@12voltvids have you tried using the LED panels as Solar panels?

@Elektrotechniker

Жыл бұрын

@@12voltvids Btw, you completely missed out on the option to wire a group of LED‘s in Series, and then wire those groups in parallel needing only a few fusible resistors per string of x Leds in Series. And if you wire the strings in a way, that there are at least 2-3 leds of other parallel strings between each Led of one string, a dead led/string wouldn‘t even be as severe as if each string consists of neighboring diodes… So many consumers would pay an extra for a feature like this, if marketed properly - But I have never heard of anything like this in TVs!

@12voltvids

Жыл бұрын

@@Elektrotechniker the problem it this increases complexity and cost. No manufacture is going to spend more then they have to. Despite what people precieve as a high failure rate did you know that less than 1% have backlight failure within 5 years. Less than 5% in 5 to 7 years. Also the number 1 reason they fail is having the backlight cranked up full. The failure might seem higher than it is but the vast majority don't have issues at all. Most that are going to fail will fail during warranty period.

@12voltvids

Жыл бұрын

@@MAGnetICus_Attractus ?

Another one saved from the waste! Nicely done.

@12voltvids

Жыл бұрын

And I made enough to buy a steak dinner.

First time seeing your channel and you inspired me to open my unused multimeter and explore my old samsung TV. Which only worked for 4 years, now it only has a picture at the top. Great video.

@hardergamer

Жыл бұрын

Check the caps for bulging.

I hate new TVs hate them also hate them. I had a 32" Sceptre (Walmart) TV last about 2 years. A Sceptre 24" (used as a computer monitor) last about 3 years. OK, so maybe it was a crappy low-end brand, so I bought a Sharp. That lasted about 1 year. Conversely, my Sony CRT TV is still running after 24 years. I'll take nice dependable, glorious non HD television. Glorious.

@Synthematix

Жыл бұрын

Operated correctly you will get an ice age of use out of a sony, they are in no way shape or form built like these cheap pieces of shit

@jamescarter3196

Жыл бұрын

Surprised to hear the Sharp crapping out so quickly, but I think they were the first victim of 'over-investing' in the LCD boom, and they got out of manufacturing pretty early on and have had a few 'hiccup' years from what I can tell. I've heard their modern stuff is pretty good, and I've had Aquos models from 2004 and 2007, and both of them were really nice (currently using the 26" 2007 model and it's got one of the best screens I've seen on an LCD this size). Good on you for keeping the Sony, I've had a couple of Trinitrons and loved them. Currently I've got a 27" JVC crt that makes my old video games and VHS tapes look way better than an LCD does. Funny how that works.

I worked on led set before, i used the same method of just finding and jumping the bad led but the rest were so blue the picture looked purple, so for 50 bucks i got replacement strips and the tv looked like new, and before someone tells me its not worth fixing in our country we don't waste electronics like in north america we fix the for a fraction of the price of new ones

@Synthematix

Жыл бұрын

Good man! thats what i like to hear

@zoneundertop

Жыл бұрын

Everyone needs parts, free of OEM bs, third party fair license agreements. Built & designed for such work i.e. repairable. Stop the waste by design!

@12voltvids

Жыл бұрын

50 replacement parts would have our the repair over the limit set by owner. Can't work for free.

@12voltvids

Жыл бұрын

Had these been blue the tv would have been thrown away

@janedoe6350

Жыл бұрын

If you live in a cheap country where the labour price is low... they are worth fixing. But in a country where your rent is 2000 bucks a month and a you can get a new TV for 200 dollars, who is gonna give up their time to fix this stuff? After paying workshop rent, power bills and tax, you need to charge a minimum of $60 per hour. So if you can't fix it in an hour... in the trash it goes and on to the next.

Hisense may have built the set the best they possibly could and it will still fail if they ended up sourcing counterfeit LEDs. It's a *huge* problem. There are so many streetlights in my area turning a deep purple because of that. No reports of smoke on the water yet.

@12voltvids

Жыл бұрын

I see tons of "blue" LEDs. I have a few myself.

@DJStKittz

Жыл бұрын

Not true. Hisense are made tremendously cheap with incredibly bottom of the barrel parts. If you notice the TV has it's mainboard and power supply all on one board and their power supplies cut massive corners. Hisense is the ONLY modern TV I have repaired with capacitor issues because they are massively cheap. Hisense manufacturers Sharp & Toshiba also. There are litterally Sharp TV's that are 100% the exact same same as a Hisense and they are garbage. Sony and LG TV's are the TV's I see the most that suffer from the blue / purple LED flaw and those are quality made TV's. It has zero to do with counterfit parts.

@marcse7en

Жыл бұрын

​@@DJStKittz Not my experience at all! My 3 year old Hisense is excellent in EVERY way!

@12voltvids

Жыл бұрын

@@DJStKittz all white LEDs will eventually turn blue. There's no such thing as a white led. White led are made by using a blue diode and blasting the blue light onto yellow phosphor. Over time the yellow phosphor loses fluorescence and gets dimmer allowing the blue light from the diode to increase. Quantum dot use blue diodes and print quantum dots that transform the blue light onto red age green onto the back of the panel. These ones don't suffer the blue shift as far as i have seen.

@joehiatt1992

Жыл бұрын

@@DJStKittz Yep

When the video started and I saw my exact model TV appear I lost it.

Fun stuff, thanks for sharing. I replaced all backlight strips in a LG 65" 4K for my own personal use. Had dark spots all over and a protection circuit kept shutting the set down. Pretty nerve wracking working with that large of a panel (even with suction cups) but it has been working great for 3 years now. Free TV. $100 for parts and tools. Well worth the effort. Set your brightness to 75% or lower and the LEDs will last a long, long time. Good advice for customers.

@12voltvids

Жыл бұрын

I tell everyone 75% max

@ronb6182

Жыл бұрын

I got one better use an APC voltage reducer and set it to 110 volts, I use them I have two, on my Christmas light sets which are 1st generation leds and I had not one LED burn out. Before in three weeks time I had seven LEDs go bad. Just 15 volts reduction keeps the LEDs working. It's about seven to ten years now. When I go off grid I will try to find a 110 volt inverter with a 24 vdc input. I think some of the better pure sine wave inverters have output voltage selection. Now as for the refrigerator and well pump I will use 240 and 120 volts. But all lighting and electronics will use 110 volts. I found one inverter that had a 105 volt setting but I have no clue if that voltage is too low for household lights. Tube circuits should use 110 volts to keep high voltages in proper range. That's another ball game. 73

@12voltvids

Жыл бұрын

@@ronb6182 big difference between Xmas lites and proper led inverter. Xmas lights put them all in series. Different colours have different voltage drop. 1.2v for red 1.6 for green / yellow and 3.2 for blue. There is no current limiting or even rectification. Feed them with DC and see how long they last. Tv uses limited current. It doesn't matter if you feed TV with 100 or 240 volts. Most TV have auto sensing power supply so it can accept anything and send the correct voltage to correct circuit.

@SoB_626

Жыл бұрын

@@12voltvids I kept my Samsung q60a 50 inch at 6 brightness and 26 contrast and the screen still got bad after no more than 18 months. The good thing is the warranty process went fast. They had to replace the screen and the frame. Also the new screen has perfect uniformity compared to the old one and thus looks much better. I guess I'm covered for another 18 months...

@12voltvids

Жыл бұрын

@@SoB_626 I had a friend that had a Samsung plasma that had the pink problem. They changed the panel under warranty. His new panel started going bad about 9 months later and he called them back and they said sorry past the 1 year warranty. The new panel has the remainder of original warranty not a new warranty. They said if his old one failed out of warranty and he purchaaed a new one it would have had a 1 year warranty but it was replaced for free at 11 months so the new one had a 1 month warranty. Still watches it. When watching hockey the ice takes on a pink glow.

I must admit I was triggered by this - removing the screen from the back light I always worry about random bits of dust that get between the two - as the back light tends to really exaggerate the bits of dust that get left behind. Using an air compressor or air duster before placing the screen & diffuser together really helps eliminate that possibility.

@R.Daneel

Жыл бұрын

So, dust free landfill, or functional with a spec of dust.

@glenwaldrop8166

Жыл бұрын

Flip side of that is if you use the air to clear the dust you've just moved it and it may well settle in the wrong spot.

@GoldSrc_

Жыл бұрын

My dude, I have a dead ant inside my monitor, it has been there for almost 10 years, it looks like dead pixels. Most people wouldn't care about a minuscule amount of trapped dust.

@glenwaldrop8166

Жыл бұрын

@@GoldSrc_ I had a dead bug on a 1900x1200 LCD, it bothered me so bad I almost replaced the screen... lol Laptop too so anyone looking over my shoulder would see a dead bug inside the screen, that's just what you want, customer looking at dead bugs in your laptop screen... Took it outside one afternoon and a gnat crawled inside at some point and died, big black dot with six legs and damaged wings.

@soldierss666

Жыл бұрын

@@glenwaldrop8166 Hurray to preserving and recycling increasingly scarcier rare minerals.

Possibly another reason for avoiding paralleling the LEDs is that there is no guarantee that all of the LEDs match exactly in their forward voltage drop characteristics. To prevent current hogging by the LEDs having slightly lower forward drops, each LED would need a small series resistor. These resistors would increase the parts count and the power dissipation.

@jeremiahbullfrog9288

Жыл бұрын

This is more likely the reason.

You are a smart man. You are able to break down everything to the common man. Ty God bless you and your family Brother

Nice tv fix.. i keep a vintage 1979 Trinitron tv around for vintage game consoles.I havent turned it on since my cable box stopped working a year and a half ago .. Picked it up around 2006 down the street from where i live... I need some things ajusted, an old reel to reel deck and a vintage disk cutter, i have to rebuild a new amp for it as i have no schematic. Right now.. Nice video. great job on the t.v.

We have a bunch of display tvs up at our store, they run 24/7, really goes to show how well (or poorly) they stand the test of time, as the majority of the cheapo ones have the backlight crap out after only a few months...we did have a 75 in samsung suddenly stop working one day, althought we had had a power surge a few days prior so the power supply may have been damaged. guess I'll add to this, currenlty still rocking a 48 inch samsung from 2017, was a hand me down when my dad had upgrade, still going strong.

I got out of the TV repair business in 2015, we never opened LED or LCD screens even when they were worth a ton of money. Stuff got too cheap to fix and doing warranty work had too much headache.

Hisense, Sanyo and GE tv's are the only ones that come back the weeks following black Friday. My mom bought a Hisense near the end of last year. She broke the screen trying to mount it, then wasted a week trying to find someone to repair it. Every person qouted her more than it was worth, so she got a new TV and the Hisense is in the room she's dedicated to my kids when they come over.

We have corporate rentals and a lot of TVs. Way to many backlights fail. I tried finding people to fix them but no one would (element and similar TVs). All were BF specials ($228 for a 65 inch Roku). Stupid that they are going in the garbage. I have two sitting in my garage waiting for some place to dump them. One is 3 years since being manufactured (sat in box for one year as a spare) and the other one even newer.

Using what you showed a few years ago, repairing a tv, i saved a tv from landfill. tv is from 2008, PSU blew out, I replaced it well over a year ago, and it's still going strong! Thank you!

@helifynoe9930

Жыл бұрын

My 2009 Samsung TV eventually refused to be turned on. The time it took to respond to the remote turn on, was getting longer and longer. From that, I assumed it was a failing PSU problem. One bad bulging electrolytic capacitor turned out to be the problem. Rather than waste money, I took a capacitor out of a CCD decoder prototype that I had thrown together back in the late 80's. It was a 1,500uF, and the TV required a 1,000uF, but I assumed the capacitors value had dropped some what, due its old age. Anyhow, the TV has been working for years now, ever since that eventual replacement.

@codetutor6593

Жыл бұрын

@@helifynoe9930 That's great, to see these things being kept out of landfill and waste is really cool, and to learn a new skill with such implications is even better.

@DarkMetaOFFICIAL

Жыл бұрын

like 10 yrs ago i used to collect broken "junk" tv's people would throw away. nothing happened, they just quit working. they can't be bothered to even consider having something repaired so they just throw it away. i would figure out 90% of them had a bad capacitor on the power supply rail or bad psu. i could replace a cap for a dollar and sell for 50 or 100 bucks instantly. it was like printing money 😂

@MIW_Renegade

Жыл бұрын

​@@DarkMetaOFFICIALthe only reason people toss them instead of repair is they don't have the knowledge to repair it, and to take it somewhere you'd have to pay their diagnosing fee, the part + shipping, and for replacing the failed component(s), and by then it's already exceeded the value of the TV

Thanks for sharing. Wish I had found this a couple of years ago because I had a 2 year old lcd and it was dead one day, so I threw it away and I go a old lcd from a family member and it’s over 10 years old and still works great. It’s a Samsung, the one that only lasted a couple of years was a Vizio, it was the cheapest tv when I bought it.

@caseysmith544

Жыл бұрын

Vizio have had issues with the Cheapest TV's they make failing and then in early 2010's even the middle of the line TV's Visio makes failing right away but my dad got his then basement TV Now main working again after another TV got knocked down by a cat and broke in so many places it could not be repaired, well made parts but the housing unit was cheap on that Sony. He had this one individual part die off on the Vizio Middle of the line TV this little part that causes the TV to not recognise the TV is getting power to the LED TV. The Sony was LCD that died and started leaking some fluid due to my dad getting a well made internals but poor all plastic case that was like some of the laptops of the era that were all plastic and flimsy.

In many ways it's a wonder many of the LCD/LED back screens work as long as they do... Thank you for showing the breakdown.

I have a Vizio TV that someone gave to me around 8 years ago and they had it for some years before. It's still going strong, knock on wood.

@jamescarter3196

Жыл бұрын

I've always been a little skeptical of Vizio because I usually think they have kind of a 'garish' picture with more artifacts and crawling dots than brands like LG, but they do seem to be well-built (and honestly, the quality of other brands has gone down so much that Vizio has become one of the best by default). I was looking for a good used small tv recently and saw quite a few Vizios that were in great shape, but didn't quite have the connections I wanted.

I also have a Hisense TV so I got a little nervous when I heard the brand. The date on the back of mine says July 15, 2014 and as far as I can tell it's still fully functional. Almost 9 years of continual daily use... not too bad honestly.

@ddognine

Жыл бұрын

Well, not in HiSense's defense, but they probably have cut corners significantly from 2014 to 2020.

I've fixed two big screen tv's, and I still own then. The first one was a Visio that wouldn't power on anymore. Obviously replacing the power supply on it worked. The second one was my Sony XBR850C. It also developed a power on problem plus it decided to not use the wifi anymore. I replaced both of those boards and it works fine again. Haven't had to deal with a backlight issue yet. Just bought a Hisense, I'll keep my fingers crossed.

Love that fluke 12 . Great multimeter .

@12voltvids

Жыл бұрын

Paid 12.00 for it. I have a new fluke I just haven't used it yet.

Hello Mr. Volts, you are not only cheap, but you also have Hair like a Hippie. Peace and love Brother. 😂 Enjoying the Tutorial. MJ. in B'dos.

What would be great would be if the diffusers yellowed with age while the LEDs went blue.🤔😁

@12voltvids

Жыл бұрын

You mean if they don't fall off!😁

@Synthematix

Жыл бұрын

@@12voltvids Yup, cranking the brightness to max will kill these things in as little as 9 months, and yes they do fall off on these cheap shite sets

Nice simple fix, a darn sight easier than edge-lit laptop panels. Interesting what you say about the LED's turning blue with age, can't say I've heard of that.

@Power2All

Жыл бұрын

Had that with a old screen, that uses TL. Never seen a screen using LED getting blue though.

@Synthematix

Жыл бұрын

All white Led's start out as blue

@12voltvids

Жыл бұрын

White led are really blue with iw phosphor. The phosphor wears our and the led revert to blue. They all do it. Run them long enough and yoy will see.

Good job! Thanks for the knowledge.

Thank you for the vid. It is very informative.

I still love my 2008 Philips LCD with thousands of hours of use on it that i purchased brand new from walmart. I did a lot of research and this model was a high end model that walmart discontinued for a much cheaper made tv model. Not a fan of 4k so im happy as pig in mud qatching VHS, DVD and bluray. The 4k player makes dvds and blirays look even better and ill probably never buy a 4k tv honestly. Much rayher grab an older tv with cooler tech

@HansensUniverseT-A

Жыл бұрын

My SONY Bravia from 2008 is still in daily service, probably has over 100k power hours by now.

@manitoba-op4jx

Жыл бұрын

@@HansensUniverseT-Ai've also got a massive 1080p bravia. it's got all the inputs i'll ever need, composite, component, VGA, hdmi... even an analog tuner! i'll never need anything else.

There are a couple of other issues with running LEDs in parallel. The first is that LEDs have a negative temperature coefficient, so as they get hot the voltage required to turn them on drops, so the one with the lowest turn on voltage is going to hog the current, and as it gets hot the situation is going to only get worse as it will heat up faster then the rest (thermal runaway). So the likelihood of failure is dramatically increased in a parallel versus a series connection. The second is that as they fail open the remaining LEDs will be sharing a larger current, so one failing open will cause more stress on the remaining parts accelerating additional failures.

@Claugustus

Жыл бұрын

Wouldn't that last part happen when repairing with a jump like this person did too? Unless the jump includes a resistor equivalent to the resistance of the LED.

@davidnorton573

Жыл бұрын

@@Claugustus No, the driver in the TV is a current source, so when the LED is jumped the voltage required to turn on the string drops, causing the driver to drop the voltage to compensate for the lower turn on voltage and keep the current constant.

Thanks for the video, great job. Looks like the shop could use a little cleaning up, lol.

Thank you for the explanations. You've answered questions that a part timer, fix it when find it type would like to know. At least this one.,

The hisense made by vestel sets have a known problem with the backlights being overdriven, and it doesnt help when the owners crank up the backlights to full brightness, you get 2 years max if you do that, the way the panels are taped together in these is horrendous, chances are the screen cracks when you open them. theres horrible double sided foam tape all the way around the screen and its only 4mm wide, new led televisions have over 1500 leds and theyre individually lit from a microprocessor (dimming zones) making them have a perfect black level, and theyre not the cheap crap led's that are found in these vestel made sets, theyre made by toshiba, thats why i love the sony screens, theyre mega expensive but damn they have amazing picture quality and will last 10 tiimes longer than any of this throwaway crap. With these cheap crap sets its wise to go in the service menu and limit the backlight to 75%, theres no such setting in the sony service menu because theres no need to do it.

I remember my first lcd-tv, not LED. It was a Samsung 40 inch I think. It had the cold cathode fluorescent tubes in it, it was very thick and heavy. It was also very expensive into the thousands. But that's what they were at the time when they first came out. This thing lasted for a couple years and died. I took it apart and found that the power supply had blown some capacitors. So I basically just replaced all the capacitors on the power supply board with Rubys, Rubicon capacitors. I replace some of the larger capacitors with some that had a higher capacitance rating. The thing worked fine for ten years after that. In fact it was still working when I got rid of it, I just got a better lighter set with a bigger screen. They should have put some cooling fans in those sets, the heat destroyed the caps, dried them out. Also they used minimum sized and cheapest brand they could source. And bad design to save money by not providing cooling fans. Those first sets were heat producing monsters.

@andygozzo72

Жыл бұрын

the original caps were likely types afflicted by the 'capacitor plague' a hell of a lot of stuff was ....

@NEW_INSITE

Жыл бұрын

@@andygozzo72 thank you for that. What was the capacitor plague? I've never heard of that.

@andygozzo72

Жыл бұрын

@@NEW_INSITE basically 'knock off' and 'cheapo' capacitors incorrectly copying the formula used by the 'good' brands, making these bad ones fail after a short life ...

@NEW_INSITE

Жыл бұрын

@@andygozzo72 ah, yes that makes sense. And these were definitely El Cheapo not we'll made capacitors and I had about six of them go bad on the 15 that were on the board. Thank you for that.

@12voltvids

Жыл бұрын

Well fluorescent lights do get hot. I have 2 Sony ccfl sets and i love the color quality. I have plasma sets i generally watch. I use the led sets for things like monitoring my security cameras as the power consumption is lower and i leave them on 24/7

I've also noticed the dead LED is often visibly damaged with a dark mark in the phosphor. It can make finding the culprit even quicker with high led counts. I did one recently where the LED would function for a couple of minutes then go open circuit, cool down and the TV could be restarted for a few less minutes. The momentary open was enough to fault trigger the supply, if it was continuously powered the backlight would have been flashing like so many LED bulbs now do at their early EOL. Cheers.

@12voltvids

Жыл бұрын

Sometimes yes. Not this one however

Excellent video.Thanks.

Another reason to hold on to plasma. A sustain board swap at most and the panel with outlive cheap backlighting tenfold.

@12voltvids

Жыл бұрын

I have one that is 20 years old.

my parent's hdtv is from 2008, suddenly stopped working one day, honestly amazed it's worked this long, i took it apart and realized a ribbon cable came lose, they Taped it in place at the factory.. the tape dried out and it popped out of place, so replaced it with some better double sided tape, so it's good as new sorta. but it's really weird seeing that it doesn't get held in place by the connector. btw i don't even have an hdtv myself, i just use my grandpa's tv from 97, after seeing so many fail on people over the years i just lost motivation to get a new one, i've haven't heard anything good about oled tv's either, apparently they get burn-in pretty quickly and don't even last as long as lcd screens.

@kneel1

Жыл бұрын

really? my LG OLED is awesome, there's nothing like it. no burn in. Im shocked anyone is still holding out against HDTV they're all fine, its not 2008 anymore ya know

@orektez

Жыл бұрын

@@kneel1 go ahead google oled screen burn in if you've not heard of it, infact just goto image search and you'll see an abundance of issues. they haven't fixed the issue, they merely made it happen somewhat less, however it'll either get burn in or the inverter will stop working after 3 years. i think i'll stick with my crt, my vision isn't so good and i can't even tell the difference between hd and sd anyways.

@orektez

Жыл бұрын

@@kneel1 oh also i'll point out that even crt's get burn-in though it takes far longer i'd have to leave it on the same paused image for weeks, where as apparently with oled that can happen within a single day. even the oled's on the nintendo switch's have issues like this it's all random chance if it'll happen in a day or in a week but still, often oled tv's get burnins from menu elements, like channel numbers, subtitles, and if you have the time set to display in a corner. people that had the news on, often get burnin from the scrolling news bar at the bottom.

@orektez

Жыл бұрын

after i saw them come out with oled's i just thought it was further planned obsolescence and they're going to contribute even more to the e-waste problem in the end.

man, i have had to fix my mums TV, followed all the usual cap removal and testing, diode testing, checked just about everything and it was a single LED dead, i did try replacing it but no luck, i think the power board may have caused a problem somewhere down the line, i had replaced the board as part of the testing, thanks for this tip on bypassing the LED, it worked a treat, i can get mum fixed up again and get some quitet to finish other projects, lol, thanks again.

@12voltvids

Жыл бұрын

My Samsung that popped an led us still working 6 years later.

I know they're not HD or anything like this.. But my parents have a 27" CRT from 1998 that still works perfectly. If they wanted to construct high quality products, they would.

@12voltvids

Жыл бұрын

I have an ED plasma from 2003. That's one one sitting next to my bench.

These TVs can last way longer if they just added just a few more LEDs so that it is not over driving the LEDs at high brightness setting. Yeah it will add to the overall cost of the TV but I'd rather pay a little more than have a TV that can only last for a couple of year. As manufacturers are designing these not to last so you buy a new one every few years, the best thing to do is to not set the backlight to max settings.

@kyoudaiken

Жыл бұрын

This is obviously one of the cheapest sets out there. Setting the brightness to 90% already comes a long way in terms of longevity. Usually then, the PSU starts failing when you put it to 90% before any LED starts failing. That 90% duty cycle is usually enough to triple or quadruple the lifespan.

@t0nito

Жыл бұрын

@@kyoudaiken I have all my TVs set to 80% and it's still enough brightness, so far I haven't had any of them fail.

@kyoudaiken

Жыл бұрын

@@t0nito Yeah, don't worry. The PSU part is not related to LED brightness directly. It just makes the LEDs last so long that the PSU most likely goes first. Can take decades.

@rogerpearson9081

Жыл бұрын

Its like car manufacturers saving a couple of bucks on a part and wearing the warranty cost or litigation later. They do cynical calculations on these things.

No Sony? Ha ha! I like different types. I like these repair videos. 👍 Edit: I may have asked before, and forgot the answer: couldn't they design LED's to "short" when they go out, like series string Christmas tree miniature bulbs? If feasible, there might not be as many backlight failures.

@12voltvids

Жыл бұрын

Some short some go open and others turn to non light emitting diodes.

@longrunner258

Жыл бұрын

That, or incorporate a Zener diode set for a bit more (4V to 5V) than the LED forward voltage. (Or some other component which will turn on at such a voltage threshold, whatever it could be.) I'm not sure if the Christmas-light anti-fuses would necessarily work here though, as I believe they require a sizeable portion of the supply voltage to break down the dielectric coating (and occasionally fail to do so even then, leaving the likes of ElectroBOOM to force the matter with a piezo igniter). No problem in a chain of (resistive) filaments, but I somewhat doubt if the other LEDs will pass enough current while leaving enough voltage to start the shunt conducting (it depends how much voltage reserve the driver has, of course).

Talking about the design of why the Leds are in parallel rather than series makes sense. It is also nice how you can test by applying regulated power with a cheap current regulated LED Tester by testing entire led strips at once by jumping past a particular diode strip or at a strips input power feed point.

I bought a Hisense in 2019, h9f I think is the model. Still working and excellent video quality.

@12voltvids

Жыл бұрын

Turn the backlights down to 75% and they will last a long time.

Sharp makes excellent commercial grade TVs. More expensive than consumer models but are WAY better built and with much better warranties, have excellent 4K panels, and NO "smart" junk built in.

@jamescarter3196

Жыл бұрын

Good to know, because I've had a couple of Aquos sets over the years and loved both. Right now I'm using a 26" Aquos from about 2007 as my main tv/monitor, I just got it a few weeks ago because my trusty 32" LG is just kinda too big for my current setup, and the Sharp has not only terrific picture but also way better sound than I expected from a TV this small. It has so much 'thump' that I keep thinking it's coming from outside. Its lack of 'smart junk' (I agree it's a frigging scourge) and the huge variety of 'legacy' connections on this tv (especially component and S-video) were the reasons I didn't just get a new 24", which was very tempting, but a lot of the good brands have sold their nameplates to be used on cheapo sets, like Toshiba did in 2015.

@christianelzey9703

Жыл бұрын

@@jamescarter3196 when my ancient but still working great 'dumb' plasma finally dies, I'll be getting one.

@justice4You2

Жыл бұрын

@@christianelzey9703 Lol...😄

I remember going to the hardware store with my grandfather and him using the vacuum tube testing machine that was in the electronics aisle to find out which tubes from the TV was bad and then buying a new tube and going home and plugging in it and the TV worked again! I guess we've come pretty far from that, huh?

@Brian-yt8fu

Жыл бұрын

I used to have those D.I.Y. books for home tv repair. A person could fix their tv set years ago.

@Synthematix

Жыл бұрын

I wouldnt go back to a valve tv for all of king midas's silver

@12voltvids

Жыл бұрын

@@Synthematix neither would i. Tubes are good for audio and that's about it.

@bricaaron3978

Жыл бұрын

@@12voltvids With respect, I'm positive you know a thousand time more than I do about electrical theory, but you don't seem to know much about image quality. I'm open to discussion, though. Perhaps I misunderstand your point.

@12voltvids

Жыл бұрын

@@bricaaron3978 image quality? Are you kidding? I have been in the photography and video production business for about 40 years. I have some very good cameras and glass for commercial work. I do know quality.

I've been super lucky, haven't experienced a backlight failure on any of my LCDs. Then again, I keep the backlight far from maximum brightness!

@jamescarter3196

Жыл бұрын

I never thought much about it before seeing this video, but it makes me glad that I don't just accept the standard settings which sometimes have the backlight cranked up. I love messing with the picture controls, and likewise it's always in the back of my mind that keeping any electronics 'cranked up to 100%' is one of the quickest ways to achieve a failure.

I had one that had symptoms of backlit, but just before I diagnosed a burnt resistor at driver ic I went to discharge the main 320v cap and my wobbly hands caused me to short 320 to somewhere that blew a few components in the vicinity. Opto. Main switching ic, caps, resistors. I'm getting sick off repairing myself. Time to start yoga hobby.

I know why they stopped making plasmas. They lasted too long. More profitable to make these junk TV's that last three years and then buy a new one.

@themax4677

Жыл бұрын

I have two. Both are Panasonic's vieras. The 2005 (37") one still looked pretty good but weighs nearly as much as my 2010 50". Reminds me the 50 is starting to buzz with white backgrounds again. Time to tighten screws... It's also doing the not permanent burn in thing where menus look burned in until you do the white sweep, but then they come right back after a little while.

@jamescarter3196

Жыл бұрын

Plasmas are fragile, super heavy, usually enormous, they don't get very bright but they're still prone to burn-in, likewise many of them get pixel-burnout so you end up with white dots on black screen, and the only reason they were ever popular is because they came along before LCD technology caught up. Plasmas didn't 'last too long' overall, and they were superseded by OLED, not "junk TVs". It's funny that you're acting all insulted and making up sad little sour-grapes stories as though you personally are a plasma TV feeling rejected by life.

@jamesmachalik9924

Жыл бұрын

I have a 42 inch plasma my son gamed on for 10 years that I now use for a bedroom TV. Absolutely no burn in at all and still a beautiful picture that beats out my old lcd hands down. LCDs don't get burn in because they don't last long enough to develop it

@j.f.christ8421

Жыл бұрын

@@jamesmachalik9924 James Carter is right, plasma was crap. Heavy, dim, glossy, power-hungry crap. Only good point was contrast (and with glossy screens what's the point). Panasonic had an 85" plasma, it was 130kg and used 1250w. I can lift a modern 85" TV with one hand and it'll use 1/10th of the power.

@jamesmachalik9924

Жыл бұрын

I just replaced a new LCD with a 15 year old plasma. The picture on the plasma was superior to the LCD. That's how bad LCDs have become. People were brainwashed into thinking LCD was a superior technology when in fact it is vastly inferior in many ways. I don't watch TV eight hours a day so power consumption isn't a concern.

people where i live, in the middle class hood, they buy cheap big tv's expecting them to last only a couple years. saying 3 or 4 years is really good!. like, unironically it seems normal in their mind. that's just how long tv's last. how insane it is now. i still have an old crt from the 70's from my grandpa. nothing wrong with it. the thing is 50 years old. i have old radios, and other stuff. works perfectly. companies really tightened the GRIFT with consumer products now. it sucks.

@12voltvids

Жыл бұрын

I have a 20 years old plasma. Still going strong. Will probably last another 20 years.

Thanks for the good info. I guess I'll be doing this to my Hisense in a couple of years. It has a great picture now tho'. Great set for the money.

@t0nito

Жыл бұрын

Don't run the backlight at 100% brightness, lower it to something like 80% and they will last much longer.

9:30 "That's ok, it will come off" 🤣🤣

Thx for the video! At least now I know what I won't be doing to fix my set. Been using laptops for the past several years and will not be going back to a standard big screen tv set.......not ever. I've had enough of using wonky software and led burnout issues. I'm completely over the big screen thing!!!!

@12voltvids

Жыл бұрын

I'm the opposite. The bigger the screen the better.

I believe it is more likely for an led to go open than short out personally. But for protection in a parallel system, all you would do is thin-trace the positive trace on the pcb during etching and this would simply burn out in the event of a short.

Great video considering getting back into electronics repair

@12voltvids

Жыл бұрын

Don't do it thinking you will make my money at it.

Thats the best " looks damn good to me" ive heard in a long timme

Got a Samsung TV that has seen daily use for 10 years and is still fine. Just replaced with a new 4k Samsung and the old one is now in the summer house in the garden. Samsung are worth the money.

You said Hisense i said trash that is so unrepair friendly when you have issues with the backlight.When the Led is blue i changed and buy new one and replace it.Nice work.

My brother was an EE engineer and would always repair his own boards with individual components only because he enjoyed it.

@12voltvids

Жыл бұрын

Bilieve it or not that's what we used to do. Component level repair. None of this board swapping crap.

love u man tanx for every vidz

Nice repair. Another good reason to adjust your TV's backlight to a reasonable level and stay away from vivid modes to preserve LED life.

Nice job....All that disassembly for one little jumper. I could never remember how to reassemble them...

@12voltvids

Жыл бұрын

All that work to make 70 bucks

Those little speakers, in their own enclosures, look cool. I bet they sound a little better than average.

Another reason they don't wire LED's in parallel is that even for "identical" LED's, their Voltage/Current are all a little different. One of them will be a current hog and eventually fail. Then the same thing will happen again for the next current hog LED and then so on and so on.

I have only repaired one big screen TV, it was not an LED unit. I am amazed how a few point source LEDs can be diffused so well. I may source a couple of “broken” units and attempt to repair them for personal use.

I still have a Panasonic 50" plasma TV 14 Years old and never skipped a beat!

@12voltvids

Жыл бұрын

My Panasonic plasma 20bywtas old. My Samsung 63 plasma is now 14 years old working great. Had to tighten the grounds a few years ago.

@ChurchBoy0487

Жыл бұрын

​@12voltvids I have a 60inch NEC professional monitor, Panasonic/Cisco 60 inch plasma monitor along with two Pioneer Kuros(55 and 42inch) that are custom calibrated. All still work as we speak and puts out beautiful picture. Outside of needing a rare recalibration, flawless performance from all my sets. Not sure what warrants all the hatred and vitriol towards plasma televisions in the comment section but it's hilariously shocking 😆.

@12voltvids

Жыл бұрын

@@ChurchBoy0487 you can't fix stupid. Or in this case the uneducated. Most have never seen a plasma. I love my plasma sets. V

You hear that from more people that they've had it with repairing modern TVs. But also customers have had it. You pay a lot and often they don't live that long as they used to.

I have an Element TV that I used as a monitor. After a few years, the backlight went out so I just replaced the backlight strips since they were fairly cheap. Two years later, the backlight failed again. Could not find new strips so I replaced the failed LED and all was fine again... for a while. Then a different LED failed. Replaced it too. Then a different one failed. Days later, another failed. Allways a different one. Never the same one twice. Finally, I got pissed and replaced all of the LED's on the strips with new ones (not salvaged ones) using my best guess since I did not have a part number. A few months later, you guessed it. One failed again. There comes a time when fixing it just becomes more trouble than it's worth. I think that TV was cursed. I have fixed many backlights on TVs over the years that had never failed twice. But that Element TV was fixed 7 times so far. And now it sits in the corner and I really want to toss it out, but... one day I'll probably just fix it again. I'm a real sucker for punishment.

This gave me the confidence to fix a TV which had the backlight damaged by a lightning, surprisingly I succeeded

I'm old enough to rememeber late 60s RCA CTC25s that were 3 years old and had bad CRT's. (25AP22a) The defective backlights are relatively cheap. I don't now why people complain about the LEDs so much, they are cheaper and a much easier job than changing and converging a rebuilt CRT.

I fix my led bulbs that way too, it takes a minute to do, sometimes the problem with them be the led board becomes loose all I have to do is tighting the clips that holds it to the driver.

I still use an old Samsung PN43F4500. Found it for like 20$ at a thrift store without a stand. Couldn't pass it up. Even with its horrible 480p scaling and it's weird stretched pixels I love it. It will probably function for years and years to come. Unlike my old vizio or onn tv's. Had the backlight fail on all my modern sets with one exception.

I still have my 42" LG plasma I bought brand new in mid 2007 and its still going strong. Made in South Korea build date JAN 07

@12voltvids

Жыл бұрын

Yes my Samsung was also made in Korea. They turned to shit when they started making them in Mexico. Like everything else made there. Rca, zenith Sony all turned to shit when they moved the factory to Mexico.

Nice work .

Vizio back in late 2010's had quite a bit of quality issues but strangely the bloody 32 inch 2009 Vizio 1080 HD TV I use for non stop gaming on my Playstation and PC STILL WORKS!

I have a 14 year old Samsung plasma, it's fantastic for movies, it is on maybe 10 hours a week now, but back in the day, it was on all day, no intention of replacing it.

@12voltvids

Жыл бұрын

My Samsung 63" plasma is 14 years old. It runs about 5 hours a day.

People always turn their brightness allllll the way up. Turn it 50%. Saves your tv a ton of stress. I've had my vizio for over 10 yrs now and it work great.

@christronicsdereksrandomness36

Жыл бұрын

Same here. I've got a vizio from 2010 and set the backlight to 70% and it still works with no issues.

@tacofortgens3471

Жыл бұрын

Our Hisense was set tonfull blast 100% from factory. Turned it down to 40%

@christronicsdereksrandomness36

Жыл бұрын

@@tacofortgens3471 ya usually there set to almost max from factory

Yo take it easy bro, take your time.

I'm wondering if you're correct about backlights in TVs being current regulated, or if this is only true with some TVs. I remember hearing of a situation where a working LED strip was drawing to much current for some reason, and it caused the TV to go into shut down, but the repairman was surprised to discover a replacement strip allowed the TV to come back on.

@12voltvids

Жыл бұрын

They can short or go open. I have seen a few TV's with 8 or 9 shorted LEDs. Some sets use dimming as well. You can generally get away with bypassing 1 or 2 led. Be sure to turn backlight down to 75% to keep the LEDs cool.

The manufacturer probably expects the LEDs to short more often than open, thus it would not be noticed by the customer in that case and allowing for cheaper manufacturing.

Nice work

The last one of these i "fixed" was when I was lucky enough to find one TV with a busted screen and swapped it's back light to another tv that had a bad backlight. The fact that they were free from the recycle bin was the only reason it was worth it.

I bought an hi sense 43 inch TV for scraps on lazada 8years ago and it was on 24/7 nearly all the time. It still works fine and also no burn in. I'm not a fan of hisense but can't argue on the facts

@12voltvids

Жыл бұрын

I have one too, ok mine has the RCA brand and i got it free with a blown LED 6 months ago. I use it for my security cameras monitor in the house. 24/7 and still going strong with a bypassed led. The other one I have that i bypassed an led is a Samsung and that was line 5 or 6 years ago i did that one and still going strong.

I have 3 of those 50 inch models from Hisense with broken displays. 2 from 2021 and 1 from 2022 Time to do some Tv mod and see how it goes ;)

My Samsung still worked with broken LED, but I think it's edge lit, still in warranty so they fixed it 😊

I used to be a TV engineer for 30 yrs .. 1974 .. 2004 .. now can't be bothered repairing them. can't see their components 😂 .. gone are the days of changing the components .. too much hassle to get the screen apart .. I like your multimeter .. I have a Fluke 75 .. still works. :)

@12voltvids

Жыл бұрын

True. Bit really repairable these days.

Thanks, I see that there is a few possible ways to put a LED tv back into service.

Interesting video for sure. I definitely learned common issues with these tv’s however, as far as fixing them, I learned more about the back of your head. You should move the camera location so we aren’t sitting their counting hairs.

@12voltvids

Жыл бұрын

Camera is directly over the bench. Sometimes i have to lean in to do some work. When i work on the alternate bench the camera is behind me. Can't do much about that as the crane is extended as far as it will go.

I'm still using a 34 inch Trinitron. Made in 2002 right at the end of the CRT era. Basically just movies and games. My main TV is a 2014 LED 40 inch Samsung which has lasted forever almost.

You have a Panasonic DAT machine! Saw it reflected in the dead screen. I had an SV3800 myself back in the day.

@12voltvids

Жыл бұрын

Yes I have a Panasonic dat. I have many dat. I gave 3 away. You read correct gave 3 away.

My cheap outdoor c9 LED christmas lights do the same high voltage/low current thing and they all go out LOL.

Love watching anyone troubleshoot, you ever deal with dead diodes or capacitors or its most often the not the backlight causing it turn back off shortly after pressing the on button? Do you have any in-dept videos, explaining how to troubleshoot different areas?

I haven't got a clue what I am doing. But I fixed mine, I figured it was the switches. (TV kept changing source.) I just took the back off and sprayed alcohol cleaner on the switches. Put back together and it worked fine.

I have a Vizio, about 8 years old, that had an LED go out after 2-3 years. It didn't kill the panel and I've just lived with the dim spot that is barely visible most times. But there has been no hint of the LEDs going blue. I wonder if that is because I have the backlight set at 55 and the brightness at 50. The stock levels were much higher. I think the backlight was at 100 and brightness around 80.

@st200ol

Жыл бұрын

I suppose it depends on how much TV you watch per day, the TV in this video may have been used 18 hours a day. 18x365x3=19,710 hours

@captain3186

Жыл бұрын

I believe that means it's a Full Array with Local Dimming. The LED's fail in clusters if I'm not mistaken

Love our HiSense with builtin Roku

Running mine at the minimum "10%" brightness since day 1.

@jamescarter3196

Жыл бұрын

'Only as bright as necessary' is a good rule for so many reasons