There's not much inside TVs these days
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- čas přidán 29. 08. 2024
- Sorry for the glare. It's not an area I usually film in, and the lighting was reflecting off the metal chassis. This was also a spontaneous unplanned video.
I didn't realise how far LCD TVs had evolved since I last looked inside one. They have been stripped back to the minimum of standard modules. Mainly the power supply and signal processor.
This means that repairing them has become a board swapping exercise. They're so standardised that salvaged and new boards cost less than the time to trace faults on the PCB itself.
This TV is my neighbour's. I'll take it back to her tomorrow, but have ordered a spare power card as a precaution. I'm not sure if it was a rogue LED issue or if the power card has an intermittent problem. It resolved itself before I could trace it.
I'm not sure I want to get involved in changing the LEDs as it looks quite an irksome job removing the screen layers and avoiding dust getting in between them.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.co...
This also keeps the channel independent of CZcams's advertising algorithms allowing it to be a bit more dangerous and naughty.
I was half expecting "Okay, I've reverse engineered this and here's the diagram..."
You could always watch louis rossman check a few ppgv3hots if this doesn't scratch that itch
Vestel sets, cheap and nasty as they might be, have one major advantage. Schematics can often be found.
@@mjouwbuis I've been in TV retail for over 15 years, Vestel based TVs were absolute garbage but in the last five or so years they have improved somewhat. Not great but far better than they were. We sell nearly as many of Linsars and Mitchell & Browns as we do Sonys and Samsungs. Even Panasonic have been using Vestel for their low to mid range TVs for the past few years now.
Yeah.. but the schematic diagram/service manual exists and there you have
@@veritasiumaequitasius3530 Some solid P P B U S (underscore) G 3 H O T
That's a lot simpler than my 10 year old TV, much more circuit board area to ponder over. Disaster struck at the beginning of the Covid lock down when it stopped working. Stern words from the rest of the family - "I thought you could fix things". Toasters and vacuum cleaners yes, massively heavy 50" plasma TVs, not so much. I bought a repair kit for it, but it didn't help - power board still busted. It was only careful examination when powered up that showed a small amount of arcing at the transformer pads. Reflowed all the solder joints in that area and it started working again.
Good job. Reflowing solder connections on things like transformers is a common repair technique.
in the past i got to fix so many LCD's i would fix 5 a day. sometime they had massive problems and i would disable part of the PS and screw a PC powersupply on the back. i sold the pretty one for 40$ and the ugly Frankenstein one for 20$. it was in the beginning when they were very expensive. now a days for 120$ you get a somewhat big LCD brand new in the box. its not even worth trying to fix them for most people they dont care.
I fixed a floor console CRT TV when I was in electronics college. This thing weighed maybe even more than a refrigerator. Spent huge amounts of time hauling it out of my Aunt's home & such and it turned out to be a wafer thin device in series on the degaussing coil. It had just come apart & I soldered it back together.
I hope you received an apology from your family for the dissing of your repairing prowess.
"I thought you could fix things" Ah, yes... the zero appreciation sentence for helping a family member.
There's not much ON tvs these days either!
Getting voluntold to do something is so real for technical folks, lol.
Hey, you're good with "computers". You can fix this right? (Dumps 10 year old, obsolete, filthy & clearly abused garbage unrelated to your speciality) Thaaaanks~~
@@veritasiumaequitasius3530 lmaoo this comment, this literally sums up my life in my road with my neighbours
Neighbor calls and asked if you know how to change a light fixture.
Sure, better than watching television and I like helping my neighbors.
Headed in, see that she has low pressure in a tire. Top it up. While inside, notice that the pilot is out on her little natural-gas "fireplace insert."
"Oh, that just won't stay lit and it sure does stink for a bit when it goes out" She says.
Thinking: "Well, manure. Can't leave the 80+ year old with no emergency heat or with such a hazard and fires can spread to other structures."
Say "I'm turning off the valve now and I'll be right back."
Come back with a thermocouple and test. "I hope you have a good afternoon. No, you can't pay me."
"Thank you so much! I'll tell everyone that you can fix anything."
Oh, please don't... Just, Please? Don't.
@@veritasiumaequitasius3530 same here, I've been tonight and fixed my sisters washing machine. Just a load of hair pins and a face mask in the pump stopping it from emptying.
But I get asked to fix TV's and all sorts for people. And Clive is correct all the TVs I've fixed recently have been vestel ones and there is literally only two board in all of them. And vestel products get rebranded all the time. Most cheap tvs are actually made by vestel and just rebranded as other brands.
Power boards have been what u always try and either replace or if I can see an obvious problem I just replace the components at fault. Plenty of schematics online for each board. Fixed quite a few of them now
I loved when we arrived at my in-laws house and my father in-law asked where the sealant was so I could fix the leak in their car. And that was the first I had heard about it. My wife claimed she had told me earlier and she probably did but in such vague and contradictory terms I didn't know first what she was talking about and second that I expected to "enjoy" my time with them working on their car.
no wonder it's knakered - some bugger has nicked all the valves
And, the convergence yoke is missing!
@@28YorkshireRose12 probably needs a band I aerial too.
Sorry, I needed them as my feet were getting cold.
@@tonyjones9442 Quite possibly. My Samsung Series 3 covers bands 1, 3, 4 and 5, receiving both analogue and digital signals. Pretty much designed to cover most of the world's TV systems.
and the poor electron beam has no space to deflect!
On the plus side - the thump of a CRT electric shock is no longer an issue with modern TVs. I was lucky enough never to experience it first hand, but saw it for the first time at 15 years old on work experience. Bloke next to me working on a CRT oscilloscope suddenly propelled several feet back off his chair (he was ok). From that day on I had a slight phobia of working on CRTs.
They say that its not the electrical shock that's dangerous so much as your reaction to the jolt. That said, the EHT supply for color (shadowmask) CRTs is not only 25Kv but has enough current to kill outright. That gets your respect. (The supply in old hybrid valve/transistor sets was also dangerous because it generated significant amounts of X-radiation, especially from the PD500 shunt regulator. )(Those were the days!)
@@martinusher1 It's the current that is dangerous, you can take a high voltage shock without too much harm if the current is low. As my physics teacher used to say - it's the volts that jolt, it's the mills (milliamps) that kill.
@@E3SniperspreeE3 current is a function of voltage and resistance. the resistance of the body is generally constant (unless wet), so its the voltage that will kill. it also matters about the duration of exposure, you can have a hundred amps running through your body if its only for a tiny fraction of a second.
I remember my grandfather's old CRT television from the eighties. The amount of electronics in that was well over an order of magnitude more. The set had 2 pop-out drawers with individual tuners for each of the 12 channels. Then there was the electronics for the tiptronic channel swithing. And when you took the rear cover off the set, there were 2 huge fold-out panels completely full of electronics for driving that 20 inch CRT. And there was a big lump of power transformer tucked away underneath the CRT.
Gratz to you big Clive.... I bought my computer monitors back in 2015. In 2016, one of the monitors never turned on.
Because I have watched all of your video's I figured "what the hell, I can't make it any worse".
I proceeded to DE soldier all of the caps (they were no-name brand) with slightly higher voltage values.
Snapped the case back together, and it fired right up (in a good way).
About 3 months later, the other monitor died, so I repeated the process, and both of my monitors are working to this day.
Cost me about $4 in parts.
I just wanted you to know your videos are greatly appreciated. ( A small part of me wanted to experience an "Oh dear, that's not good" moment, so I just have to wait until you have another one of those LOL)
It's always so amazing to me how you can "read" electronics and circuitry as I (as software engineer) read well written code...
Not much well written code in the software industry..
The main thing I miss and might be a personal preference is that modern TV's rarely have more than 3 hdmi inputs. I know there are hdmi switches out there but for a 40 inch tv one would think there would be space a plenty for more physical input connectors.
Why would you need so many more ? 🤔😳
I don't normally post in the comments but Im not normally in a position to help out big Clive! The fault on this set is normally the edge connectors on the backlight strips. The fix is to just hardwire them with some bits of wire. If you are really unlucky then one of the strips will have failed. Replacements can be purchased from ASWO. (I do this for a living btw). Cheers and keep up the good work Clive 😁
The secondary rectifier diodes on the PSU like to short too.
Those Vestel tv's are actually quite interesting, the software on it is basically linux and a set of programs which handle the rest
Since they use the same parts on multiple televisions they have some files in the firmware which define the panel (so one could theoretically get a different lvds panel and reuse the board as a driver for it)
The scart port can be used to control the tv and to get a root shell
Also there is a lot of fun stuff hidden in "aurora.elf" (the main program) like the videowall feature and options hidden away from end users
Beware: Some firmware versions have a (possibly still unpatched) bug which allows an attacker to connect to port 1998 (iirc) over telnet, start telnetd and have a root shell allowing him to have access to usb drives and webcams plugged into the tv
Have a video on my channel of me getting a console on a dead one
who on earth leaves a telnet port open after the year 1993?? you've basically created a device that can be hacked by accident at that point
It's a tx/rx pair on the scart
Even the top brand TVs are usually Linux based, but more locked down.
@@rertnerfurtheng3771 I suspect there's still a remarkably large amount of security by obscurity going on. Its not like its inherently bad to have an open port though if they are using an API to do anything. Remember, even a web server can be talked to over telnet, it doesn't mean they are necessarily all exposing a shell.
I immediately recognized the Vestel boards right when the video started. These TVs are practically a one size fits all.
Yep its just the firmware and screen size that's different
The easiest way to tell one apart with the back still on is to see if the ports are in a neat small square.
@@andrew_koala2974 Sanyo, low end Panasonic, Toshiba, Blaupunkt, Polaroid, store brands, etc... All made by Vestel
I'm sure I'm not the only one here who used to take everything apart when I was a kid to see how it worked. Back then, you could actually see how stuff worked! Today if a kid figured out how to use a security screw driver and opened something up there still isn't anything to learn from...hard to figure out even the basics of what is going on inside...
That's how I learned about capacitors. Ouch.
@@tncorgi92 LOL! Me too - I liked to play with those old disposable cameras. I'd take the film out and keep the "disposable" part. That big ol' flash cap really burns!
@@tncorgi92 yep.. Zap! WTF, why am I on the other side of the room? And I'd been so careful by disconnecting it from the mains first :D
A little bit of knowledge is a dangerous thing !
We used to make "stun guns" from those when we were younger. Used coat hanger for probes. Made the mistake one day of charging it up and grabbing a probe in each hand. Weirdest feeling I've ever experienced I think. Could feel my muscles moving but had zero control over it. Only for a second but I remember it as much longer. Closest thing thing I can compare it with would be when you have a "chill" and quick shiver.
Modern kids are adapting to modern technology and how to fix it.
I work repairing those vestel tv in spain and prety much all 40" and 43"
tv from vestel has the same issue in the led strips.
remove the black plastic cover with the speakers, bluetooth and wifi modules.
disconect the lcd panel.
cut the metal tape and black tape arround some spots,
now you can remove only the chasis with the backlight.
it has 3 led strips attached to one green pcb.
that connection fails a lot. a bit of tin and solved the problem.
also, you can identify those boards with the number that start with 23, in that psu is near the qr code
Superb! I come here just for comments like this one.
I wonder if Clive gave this a try. Perhaps he’s worried that the neighbors will expect him to start performing miracles on demand… 😂
It's comments like these that keep me coming back! . ¡Gracias!
Great feedback 👍
If TVs were like this in the 60- 70s I would have never looked at the elements inside of the vacuum tubes my father and uncle tinkered with, never worked in TV repair shops during high school, never found electronics so fascinating.
I think you've got a very good point there. My interest in electronics was sparked when I was about 5. My parents used to let me fiddle with an old Bush battery radio and the entire back was removable to change the PP3 battery. All the brightly coloured wires and components really intrigued me as to what they did. I can imagine if it had looked like this TV, I wouldn't have given it a second thought.
I went to college to become a TV repair man, they were full to the brim with electronics back then. The circuit diagrams were hilarous.
Disposable TV's started appearing just as I finished my course making my field obsolete, I'm a postie now lol.
welcome to 2020, it'll get worse, as more and more jobs get obsoleted intentionally maliciously for the sake of throwaway consumerism
What kind of.sham makes TV repair a college degree? It's at the skilled craftsman level and should be taught like other semi-manual crafts like blacksmiths or carpentry.
@@johndododoe1411 It's modern education, over-specialization; over-segmenting educational topics to small trivial units that they can sell in bulk wholesale, UPSELL, to employees of some company.
@@johndododoe1411 Perhaps an electronics degree, the chap just happened to be in the TV business?
@@johndododoe1411 Back in the day it was an art all by itself, have a look at older CRT schematics.
I struggled with a Sony receiver back in the early 80's only to discover one of the circuit board screws just needed tightening to restore ground. Your situation could be similar, considering the entire chassis was ground and any one set of screws may be very important to be tight.
@@andrew_koala2974 I was talking about a receiver, as in stereo amp with am/fm/phono/aux., not a television.
@@andrew_koala2974 Did you really just attempt to criticize someone for using an incredibly common method of abbreviating the years into the two most relevant digits?
@@DaVince21 Yes he did. You know somethings wrong when you see the weird capitalizations.
@@DaVince21 It was such a stupid response for an expression that is in everyday use I thought that I must be reading it wrong. I thought that perhaps he was joking but then he went on, Join the herd of Sheep. Peculiar person.
"It did that horrible thing where after you start probing about it starts working again..." I've had programs like that. They run perfectly if you have a breakpoint, but take the breakpoint out and the thing mysteriously terminates.
somebody didnt await async properly xD
Ah, yes, fun timing based issues :D
Race condition ?
It's called a Heisenbug.
Back in the 80's, I had to debug an assembly code problem that was caused by the assembler. If the number of bytes was divisible by 256, the assembler dropped the last byte.
Took weeks. I'm still pissed about it
I tore my flat screen apart and replaced both boards. Unfortunately I think the LEDs burned out. It cost me less then $30.00 dollars to replace both so I wasn’t out much. I’ve heard the power supply can be an issue on the TV set I owned. Thanks for breaking each of the boards down to their individual components BigClive much appreciated
You're a good neighbour to have, kudos to you for getting their TV fixed but I expected nothing less!
Not much *on* them either, except puerile drivel.
In was a TV & VCR servicing apprentice in 1991, fabulous and lovely memories. I remember the first job I ever did at 16 years old on that Saturday morning - cleaning the card edge connector on a module in an old Philips TV.
Beautiful.
i used to work in tv repair... i watched it go from component tracing to plugging the tv into a laptop and getting the message “replace board a”
wow really?
Is the ability to access that limited to manufacturer warranty service? I would think they design these to be more cost effective to replace than to fix. Surprised they'd put effort into servicing outside of their own warranty repairs
I did my apprenticeship in TV re[pair at a lovely place called Julie TV in Bolton.. £15 dual standard sets.. some even point to point wired.. sales £15 mono.. £25 colour.. rentals from £2 a month!!.. we had some beauts let me tell you... the customers, not the tv's.. those were predictable and often cleaner than the waiting for demolition houses our rentals tended to see.
@@timi6050 - sometimes it was boards b or c... but yeah, cheaper to replace a robotically made surface mount board than to pay someone the hours to find the faulty component...
@@PaulaXism I did my training in the mid-1970s with Rediffusion. Mostly all valves (or bottles, as the other engineers used to call them). www.davidviner.com/rediffusion.html
This is why channels like yours are so important, encourages us to fix stuff. Had a dry joint on the hdmi port on mine, quite a common point of failure, tried reflow in the oven but no joy, board swap did the job.
OH! There is a whole hell of a lot of thing inside TV's these days. You just need a microscope to see it all.
that why they can discount for chep...
The real reason why TVs are so inexpensive these days is that the manufacturers sell your data to marketers and other third-party companies. Some TVs were caught listening in with microphones
@@fredsilva8076 huh where would the data be sent to? that doesnt make much sense
@@fredsilva8076 smart tv
I repair TVs on a very regular basis and I can tell you now that LED backlight failure is frighteningly common on modern TVs - they seem to be designed to fail within a week or two of the guarantee running out. Usually one or more of the LEDs shorts out and the controller detects the change in voltage drop then shuts it down. Sometimes the LED driver chip fails, but that's quite rare. In my experience it's almost always the LEDs themselves. One exception I did get was a Phillips-branded 43" smart tv that had an open-circuit current sensing resistor in the driver circuit, in addition to the usual handful of blown LEDs.
Here's a pro tip - When you get a new tv, go into the settings and make sure you reduce the backlight intensity down to around 60-75% and the LEDs will last a lot longer. Too many people have the brightness set to 100% and the LEDs burn out in no time at all. They tend to run really hot even at reduced brightness as they tend to be overrun in order to make a brighter picture.
Aside from the LEDs, the other most common issue is failure of the PSU boards and this is almost always due to a shorted rectifier diode on the secondary side of the main transformer. These cheaper Vestel-made boards tend to have two or more diodes in parallel (cheaper than one high-powered one I guess) to spread the dissipation (these things get red hot in use, as with most SMPS), making it necessary to lift the leg of each one in turn in order to test them properly. When you replace one of these paralleled diodes, it's always good practice to replace all of them to reduce the chances of a boomerang job. Thankfully, the bad capacitor plague tends to be less of an issue now than it was a few years ago, but we still see bad caps in older sets from time to time, but it seems to be the output rectifiers that are the weakest point in these more recent Vestel PSUs, though this happens with other manufacturers too - only a few weeks ago I had a Samsung 32" tv in with this exact problem, and that had a Samsung-branded PSU in it, so it's not only the cheap & nasty Vestel boards that are affected.
@Против Глобал I guess they went with the cheap option
Fascinating insight Clive. Yeah I hadn't realised they had been stripped down quite so much. Fond memories of the CRT days.
Very nice of you to help out your neighbor.
Amazing compared to what's inside old CRT sets, no wonder the price of TVs have plummeted
Vestel TVs, branded as anything including Finlux, Toshiba, JVC, Hitachi. Mine went at 13 months just out of warranty, in line with a lot of the comments here and elsewhere. Luckily a nice TV repair channel had uploaded a CZcams video of the main fault with these power supply boards which appears to be the diodes. 3 x diodes and 2 quid later plus a bit of soldering saw my Finlux jump back into life about 5 years ago, very satisfying repair and still going strong. Nice vid Clive as ever, greetings from Central Scotland.
Tuner, LED driver, transformer, yeah, not much. They're basically just scaled-up handheld TVs. The panels are 60-90% of monitors these days.
Yep. It's hilarious when I see second-hand TVs on sale for 50% of MSRP with a damaged panel. People don't realize that the panel and software are 90% of the TV's value. Salvageable parts are only worth tens of dollars, especially as a model gets older and there's more boards to salvage.
I have a neighbor that is picking up every free broken TV that they can, yanking the circuit boards, and dumping the rest of the unit in piles at the street for trash day. I assume they are trying to salvage precious metals from the boards, but isn't a working TV worth more If they just fixed them?
@@nefariousyawn I just hope he's processing the parts far away from his house. No telling what kind of roaches or bedbugs might be in them.
Power supply pcb is 90% of the problems
I had a 40" Sylvania led tv that died and I kid you not. Every. Single. Component was on the one board. The powersupply failed and instead of fixing it I bought a Phillips
I used to be a service engineer for DER in the early seventies, working on black and white TVs. Only the most experienced engineers worked on the colour ones back then. Most TVs I had to fix had valves but the very latest 1500 chassis had transistors and I think, just one integrated circuit. I changed to a job in a non electronic industry after that and so lost touch with modern circuit technology. It's amazing how far we've come. I absolutely wouldn't know where to start to repair a modern TV. When my own ones go wrong now, which is rarely, I just take them to the recycling centre and buy a new one.
Support call 30 years ago: “The V-hold’s not working on my TV.”
Support call now: “My TV says it can’t resolve the host name when I try to install an app.”
More advanced tech as more advanced issues.
@Mudkip909 named Jim 🤣
Maybe I missed it, but what was the brand?
Ah, Vestel... printed on the PCB. Never heard of them before this
Vestel make pretty much all the low-mid range TVs these days, brands like Toshiba just slap their own names on the case.
@@uK8cvPAq unaware of this. I am in China, so seldom see these things. Good to know.
So, is treated like an ODM/whitelabel, they must churn out decent quality?
@@gbraadnl Yes Vestel is an ODM but they're built down to a price and notorious for failing in the repair industry. Not sure if they're in any Chinese market TV's however but here they're usually sold as cheap grocery store TV deals.
@@uK8cvPAq just searched here, but only a few parts. Focus on the European market I guess. A store like Aldi sells some Medion-branded products, which in turn is owned by Lenovo... but these are also based on Vestel? Curious...
They make most of the store brand TVs and washing machines you see in Europe.
4:30 The broadcom IC and the printed PCB antennas are a strong indicator for this being the WiFi module.
I spent ages on a neighbours TV with no backlight once. Eventually found it was fixable via a firmware update via USB stick - it was only some software quirk that had caused the TV to suddenly stop working.
The company I work for sells primarily TVs, I've worked in a number of roles there in my time and probably 6 months or so was spent repairing things like TVs (among other things). This is pretty much the same as they looked back then (5+ years ago), though it was at the time that CCFL was still being phased out - those ones had a separate CCFL driver board.
I have a question, here in the video, on the yellow board, are those two cylindrical things batteries? 🤔
@@busog97641 no, they're just capacitors
Whew, why must you remind me of old backlight systems? I had a set with a florescent backlight ad front glass. It was a 45 inch set that weighed about 50 lbs, I thought it was plasma until I changed out the backlight and saw the lcd panel
Newest ones are just an Android SoC with a power converter.
Hard to tell - are you serious?
@@Asdayasman it might not be quite so simple, but he's probably not far off. Almost everything the TV would need would be integrated into the main chip, especially as it's almost all digital. There might be an outboard chip or two to handle some of the legacy analog stuff, and perhaps a little bit of glue circuitry, but the bulk would indeed just be one bigass chip.
@@witeshade Many "smart" TVs which have embedded web browsers and such are exactly that, an SOC containing an ARM CPU core and display control circuits, running a custom version of AOSP (Android open source platform). HiSilicone is a supplier of such chips to many different TV manufacturers..
@@Asdayasman My Sharp TV broke down and the green Android logo was showing with a messaging in English and Chinese saying, "there is a problem with the processor".
I managed to fix it by using a hot air soldering iron on the main processor.
@Silvio Balaško It's called percussive maintenance! There's also the travel bug - you can't find the issue on site, take it back to the workshop to find it works fine when you get there!
It's a Vestel - Covers most of the badge engineered supermarket brands around the globe! Usually, I'd go straight for those electrolytics and the associated triads of diodes. It's commonplace for those to fail, and easy to repair. Most folk would just bin that thing and get another set - They're just so cheap these days. Nip down to the supermarket, loaf of bread, pint of milk, packet of cornflakes and a 40" TV set. Incidentally, the caps don't always get as far as bulging before the lights go out!
And most of those caps are 85° C 2000 hour caps.
@@MichaeljRichter And, it doesn't take long to knock up those 2000 hours - It's less than many standard lightbulbs!
@@28YorkshireRose12 the poundland LED bulb.. had mine now for 5 years.. still going strong.. but then it's only been switched off 3 times in all those years.. it's on now.. I like my privacy.
Yep. I fixed one salvage by replacing caps._
Actually, not everyone has the money to spare to get another set. They are RELATIVELY cheap. Cheap relative to your income perhaps but not to everyone.
Oh to be an engineer so confident in the EMI resistance of their design that they'll run a high frequency LVDS ribbon directly under a power supply board.
Probably it's part of the programmed failure.
Well they probably work for around 450 GBP a month lol.
Interesting video! Often wondered what happened to TV repairing? 😯🤔😁 I remember years ago it was common to have the TV repair guy fix your TV, I guess now it's cheaper to just dump your old TV and buy new?
I'm talking real 'old skool' when Dixons and Curry's looked like furniture shops with all their teak wooden cabinet type old CRT TVs ! 😁😎👍
I was a TV tech from the early days of colour tv until 12 years ago , when Tesco started selling tvs the profit from selling and repairing audio visual equipment just died, in the end skilled engineers were made redundant and sets just exchanged or panel swopped by lower paid pc techs.I ended up repairing valve amps because nobody under the age of 60 knew how to fix them.
@@aardvarksmith6852 Yes, it was all valves in my TV repairing day as well. I moved from electronics to programming in the mid-1980s - probably a wise move!
@@aardvarksmith6852 I remember TV repairmen being like the 5th emergency service, in the 1970s and well into the 80s. Especially in the days of renting a TV, companies such as Rumbelows and Radio Rentals had their own technicians.
The older valve type TVs that required considerable warming up and would often go out of tune, my job being closer to the TV was twiddle the channel change buttons to fine tune the picture. I was basically the 'remote control'.
We had an intermittent fault on it where a good sharp whack on the cabinet was enough to jolt it back to life! 😁😎👍
I seem to remember somekind of cash box either in the back of the TV or on the wall, which you had to feed a 50p into it if the picture went off?
I certainly remember renting a VHS video recorder in the late 1980s when I got my first place, they were so expensive to buy.😊😯😁
Most TV's and computer monitors I fix don't even screw the boards in anymore. They are mostly held in by tape which always makes me nervous.
Don’t forget hot melt glue.
But ... but ... wheres the bloody deflection yoke ?? 🙄😬
When I was young I was THE "remote control" for the b & w telly we had... Dad would bark the order & I'd scuttle over to operate the rudimentary controls... 😂
😎👍☘🍺
No line output transformer either. No wonder it doesn't work.
"rudimentary controls"....
Laptop lid open = telly on
Laptop lid closed = telly off.
I can also turn it off via another computer in the room if the cat's asleep on me.
I see why it doesn't work... The HOT is blown too!
That happens often with unplanned videos, that they are spontaneous.
TVs are so cheap now. Here in the USA you can get a new no frills 40 inch TV from one of the less great brands for about $150 at Walmart, not even on sale.
Especially around the holidays. Sometimes you can pick up a shelf demo unit marked way down because they've lost the box, manual and remote. Manuals can be found online anyway.
Image quality will be garbonium though.
You can even get a 43in 4K “smart” tv now for about $350.
@@AsdayasmanEh, beats a old pre LED florescent backlight one with roasted backlights and shit picture processing that doesn't even let you disable the stupid overscan crap and run it 1:1 pixel mapping. It's hard to buy a bad TV anymore.
@@Broken_Yugo Maybe my standards are higher than yours, being primarily a computer user. I like my monitors like I like my women.
Calibrated.
(I'm not sure either).
I love how you managed to get a board for power for a 44" TV for £12 with shipping. When my 19" LG monitor from mid 2010's PSU went nuclear (idk exactly what died on it, it just had black ash all over it and the metal shroud) it would've cost me £25 and that was without shipping. I could literally have bought the same monitor for cheaper lol
Most of those TV boards are sold 2nd hand in my country for like $70, wtf are you guys complaining about, cheap prices?
The capacitors might just have dried out. I found that in my mums sky receiver (snowy picture and worsening reception) - only 1 was domed on the low voltage side and there only was some slight staining under the high voltage ones - once those were replaced the picture and signal were perfect again.
yeah if you have to open it up then just replace all of the electrolytic caps. They don't last forever.
Commendable to repair something that ordinarily would be binned and a better, bigger, cheaper TV purchased.
"Better", hehe, as in more numbers on paper?
@@em0_tion pretty much. Unless you're buying a television with a different panel technology (like a giant OLED) then Televisions are all pretty much the same, because in reality there are very few manufacturers.
Cheaper definitely. Better are hard to find. Looking at the size of those speakers and it isn't surprising the sound on modern TVs is so bad. Also the number of inputs seems to be going down which is bizarre given the amount of devices that get plugged in these days.
Had one like that, a secondary rectifier diode went short. BTW Vestel suck and can be found in nearly every cheap TV model these days even ones made by well known brands.
It's a common problem, don't forget to replace all three not just the failed one otherwise it will fail again quite soon.
Vestel is the largest TV manufacturer in Europe, most "super market" brands are made by Vestel. The software/firmware is more or less the biggest difference in TVs these days. There aren't that many factories left that manufacturer the panels...
Agreed. We had one of these power supplies in a Toshiba branded TV - only one diode faulty, but got a kit of all 6 for about £7 from Flea-Bay. The biggest job was pulling the TV apart and putting it all back together again.
@@Fifury161 not in Europe...they are manufacturing in Turkey.
@@marcinjastrzabek9784 Which is partially located in Europe. You're accidentally right, though. Manisa, the city of manufacture, even while geographically west of Istanbul, is indeed on the Asian coast of the Aegean sea (which defines the border between the continents as far as I know).
Modern design in general can be very disappointing that if it breaks it usually ends up in the trash either because a part couldn't be sourced or that the cost/effort made it not worth it.
Most common fault according to my experience with vestel made tvs is in lcd backlight.
To be honest it is highly likely that what you saw was indeed backlight fault. Sometimes those LEDs come back alive and work properly for some time, but you'll need to replace it anyway.
If you need any information about this set in particular msg me, I do have certification and authorization to repair vestel made tvs as in warranty.
My neighbors threw away what looked to be a nice Samsung TV but sadly some one smashed the screen before I got to haul it in for potential repair.
@@johnpossum556 rip that's a pain
The newer T.V. only have one board , power and main board all in one, Most common problem on these T.V. are LED failing
LED backlight or LED pilot power light
oh also 11. the firmware needed a proper powercycle, off the grid for a good hour so all power drains out.
Awwwwww! I was getting settled in for a 6 hour reverse engineering video! :-(
I can almost guarantee all the backlight LEDs are all in series and one has gone open intermittently. I see it a lot.
Just found the same thing on a TCL 55405. One LED out and tv goes into protection mode of some kind.
@@tbohtwentyone have similar on my Blaupunkt gaming "monitor".. takes it a few minutes to decide if it's going to fire up the backlights some days.. So far it's had 3 LED's replaced.. couldn't get the exact ones.. but I'm good with SM tech.. stick em on.. then slide em a bit.. would have thought the packaging would be standard but apparently not.. I'm not going into the 4 billion screws again just yet.. Not while I have a kettle and coffee.. Mostly objects if it's totally powered down so I'm suspicious of the caps as well.. next time it actually fails the whole lot gets seen to..
Yup. Especially on awful cheap vestel shit like this and their countless rebadge "brands"
The amount of electronics is much less than in a console tv!
God, don't remind me of those days! It could be a nightmare to troubleshooting those messes. Funny story though, the shop owner was troubleshooting a high voltage issue (flyback transformer) on a Sony while on the phone with Sony Support. Old school cordless phone in one hand pressed to his ear, high voltage probe in the other under the cathode plug. Looked down at the board and pressed too hard and the probe and unsnap the lead which grazed him on the cheek as it's falling. One hell of a snap and squal as he's rolling over backwards in his chair. Funny hell once I saw he was ok on the floor! Brushed the phone antenna as well and smoked it.
It’s amazing how empty the inside of a recent iPhone looks, too...
I think that's a bit different because iPhones are astoundingly complex. Companies like Apple now have two PCBs sandwiched on top of each other, and on the AirPods, the flex cable IS the PCB. TVs are different because control ICs are very integrated and commoditized, so PCBs are getting less complex.
I will admit that Apple engineering is very impressive.
let alone whats on TV these days....
You need that smart TV. I just finished watching The Rockford Files free on the peacock app. IMHO it's the best detective show ever made. Good time for it, too, as we Minnesotans just broke the 104 year old record for the most snowfall this early in the season. And it's heavy snow, too. Proof that about the only thing I watch on regular TV any more is the news & weather.
For that they've invented Chromecast, so we can watch BigClive on CZcams instead. 😃
@@Quick_Fix Mine came with chromecast built in and the youtube app so I frequently do watch him and my other YT favs with it. It's great. My only real complaint is you don't get your new notifications or control you get when you watch via computer.
Nothing worth watching on the "alphabet soup" networks.
@@MichaeljRichter If you haven't already seen it via the pay app CBS is playing ST Discovery. I still like TOH on PBS.
Interesting that the power supply drops the voltage then it’s boosted again. Why is this done?
To make it easier to regulate the current through the LEDs efficiently. The same PCB can drive a wide range of LED voltages.
bigclivedotcom so you are saying it’s easier to do a major reduction using standard components and then just vary the boost circuit as required?
@@michaelfisher9671 From what I can see, the boost is ramped up until the required LED current is achieved. But with a safety threshold.
@@user-gx6jb6wc5g Thanks Clive
Most led string drivers are output current controlled because LEDs need current control to prevent thermal runaway. Most LED drivers are designed for a set voltage input. The LED driver they are using would be an easily obtainable IC in one of the most common input voltages, which is 12V.
I’m surprised you can get parts. In the US I had a hard time getting parts for anything more than 18 months old. At least from the manufacturer.
I live in germany and most of the time i don't want to wait and order something from china i will find it in the UK to my surprise. Costs me a bit more but i don't have to sit on something broken for a month or two.
I couldn't find a replacement board for a Vizio TV I have at all, and it's only a few years old. Let alone a Samsung from 2008 that now has a broken HDMI port but otherwise still works
I'm also looking for an LG 42 inch mainboard. €75 seems a bit much for a 2nd hand tv from 2012.
Parts can be hit an miss, I started my apprentice days in tv and video repairs most items were off the shelf back then or next day, now days they make they parts obsolete so quick, not available to the repair trade or just make them so expensive it’s not worth the repair costs
Also in the US. Most of the time it's not worth the cost of the board on an old TV. One of the inputs died, and considering the connector is fine, it's an issue with the chip, on a model from 2009 or 2010. The board itself was $200+, used, before shipping. For that price I can easily find a direct replacement for that TV, or I can save a bit and upgrade to a model from a year or two ago.
Like most consumer electronics these days, it's cheaper to just get a full replacement than trying to fix anything. Especially on TVs where almost everything is proprietary to a specific model.
4:19 anyone else think that looks like Sid from Ice Age?
Heh, took me a moment but yeah
Tell your neighbour, there’s only one channel she should be watching and that’s BCDC
Good one... LOL...
Somehow crotchless overalls doesn't seem like a good fit in this case.... better have her stick to the pre-recorded channel.
5:34 repairman syndrome
👌
cant say ive ever walked into curries and seen a vestel tv
You've probably seen lots. Behind those Toshiba and other brands badges are Vestel units.
@@user-gx6jb6wc5g Indeed, they are the scourge of the "that name used to be big so we'll badge our crap with it" items. Wharfdale, Blaupunkt, Polaroid and Sharp to name a few.
Yup, probably 50% of LCD TVs are Vestel with a different big brand badge on the front
@@user-gx6jb6wc5g - what was this one actually badged as?
@@WKDPOWER Toshiba.
@@user-gx6jb6wc5g 'ello Tosh, got a Toshiba?
Never turn the light on a led screen to full! led light burns up fast and does not last long! Not higher than 70% of full brightness!
@Против Глобал That is correct!
Thanks Clive. Can you share links to where one might get those replacement boards?
Ebay
He'll probably get in trouble with CZcams, but a Google search will find you plenty of listings.
Much simpler then my old plasma TV with its HV PSU waiting to bite you.
ever see a B&O 70's 26" crt colour with it's TWO PL509's with something like a 12kv pulse on the top of them and x-ray shielding everywhere..?
No wonder old tv repair people have weird cancers
There really isn't!
It's not the same without all the coils of death.
Yep, and forgetting to plug all the coils in after replacing a tube meant watching in horror as the electron beam burnt a line across the tube and then you'd have to pull everything apart yet again to put another tube in and hope you didn't do the same silly thing again!
Not so sure about how much this is a TV of "these days" when it's got a VGA input lol
They are computer monitors with an on-board computer that does the TV stuff. And often cheaper to buy than an equivalent computer monitor that doesn't have the on-board computer.
@@katrinabryce but buy the 100Hz or higher refresh tv/monitor,
probably not a problem these days, but for second hand ...
@@katrinabryce 20-10 years ago traditional LCD TVs like a Sony Bravia had VGA and DVI with audio so you can use the TV like a monitor. Sometimes TVs have monitor outputs like VGA and monitors have TV outputs like HDMI for game consoles.
If a screen has a RF port snd a tuner then it's a TV.
ugh, Vestel.. i've repaired a few with the same boards as this. Hokey power supplies are usually the issue
Went here for the schematic. Sad.
Just kidding. 😆
My neighbour threw out a smashed LCD with these two Vestel boards in it (well, slightly different configuration, but same multi-config PCBs), LEDs still worked so powered them from an LED supply and made it into a light box/softbox panel, just cos... :P
I've got a old friend's TV cos the tuner went wonky on it. I'm using it as a computer monitor watching iPlayer.
"these days" - and this TV isn't even that modern, given that it has composite and VGA inputs
There's very little inside a telly now, basically 2 small to mid sized pcbs and one or two chips to do the signal workings 📺 🍿 🙄🥤
What? No reverse engineering? 😁😎For my punishment I'll go and shovel snow now........
It was HEAVY and it's STILL coming down. We apparently have broken a 1916 record for the most snowfall this early in the season!
@@johnpossum556 where?
@@coler154 Twin Cities, Mn
Geekiest comment section on CZcams. Love it.
I remember looking in an early 60's TV my parents had thrown out to the back yard when I was an interested 80's kid - It must have had about 10 different valve circuits to my memory!
I had a similar thing with my neighbour's telly too. On power up it just stayed blank and dead but with just the tiny power indicator showing. As if it was stuck in standby mode. I googled the part number for the power board and found a handy video explaining the actual likely fault. Turns out it's most likely cause was one of the six diodes which are in parallel, so by unsoldering one end of each I could test them to find which one had failed. The very same youtube site also sold handy replacement diodes as a kit. Changing just 3 of the diodes to keep a matching set, fixed the problem. My neighbour was ever of pleased! All through the power of google!
I took apart an older LCD TV and just about every part was on it's own board and very easy to do modding. Was able to pull out a VERY nice audio amplifier board in which I did not hesitate to build something with it. I made a nice boombox/portable amp with built-in speakers and I run it off a 12 volt drill battery from a broken drill. It's pretty loud.
I had a similar device in my lab recently. It was a repair for a friend. I did your exact same diagnosis and ordered straight away a new psu board. Unfortunately the board was not the exact same model, but i thought it could work anyways. After installing the new board, that still didnt fix the issue. So, i ordered again a new power board, this time the right one, but again, it wasn't working. So i had to conclude that the main board was faulty and it was not sending the right signal to turn on the back leds. Fixed the problem with an external psu only for the leds. I shoved it into the case and mounted all back togheter. Fixing complete
Remove those 6 silicon diodes and check readings all match when forward and reverse biased with a multi-meter on diode setting. If you don't fancy that get a hair dryer or heat gun on the diodes or the output electrolytic capacitors to see if you can bring the fault on while it's working normally. I had this exact fault on a similar Vestel TV. One diode went short, shutting the SMPS down. Replaced the lot and now working perfect.
That's the reason after 35 yrs as a tv repair technician I am no longer in business.
Simply put, they made TVs throwaways.!!
Look in a late era CRT TV (from the early/mid 90s onward) when the picture/AV processing was all handled digitally through a system on a chip design, and it’s virtually the same as any LCD.
The SoC processor is extremely complex, though and with CRTs it enabled advanced, features and image/source processing and better reliability by digitising everything and then converting back to analogue for the tube.
Today, as demand for cheaper/more competitive LCD TVs continues, they’re (in the last two years) starting to build the power board onto the mainboard (AV board) which often now also contains the panel driving Timing Controller to streamline production.
This method was used for a while in LCD monitors.
I’m not sure about the reliability of that method as you’re putting warm power supply parts next to the video parts, but it’s only being used on lower end models.
I started out as a TV engineer in the late 70s. Valves, Hugh transformers, 25kv and boards everywhere. I sometimes miss those days. I don't miss the heavy cabinets, especially carrying the bloody things in and out of houses.
I have repaired quite a few vestel TVs . The 160V 56uF electrolytic capacitor for the LED backlight goes high ESR, even though it's not bulged and that causes the surface mount MOSFET to go bad but it doesn't usually fail short. The driver IC is usually OK. I replace the stupid surface mount FET with a through hole IRF640 (200V, 18A, 0.15ohm RDSon) and add the unpopulated small ceramic snubber capacitor that is missing. I put in a 101. I replace the 160V 56uF capacitor with a high quality low ESR 100V 100uF capacitor. It doesn't need to be a 160V cap, the backlight voltage is NOT over 100V. Backlight works again and better than it did originally.
The unpopulated capacitor is C110 on the power board in the video but it will have different designator numbers on different boards. Its between the drain and source of the FET. You don't need to order a new power board. The replacement board will fail in the future if you don't replace the crappy MOSFET and 160V 56uF capacitor and add the ceramic capacitor.
Not the valve-lit devices of my childhood - with that special aroma when warm and instant death lurking between the ventilation slots. Watching from a respectful distance as the repair man called - quite often. Later, when I was a Uni lecturer in an entirely different non-science field, I used to read a TV magazine in the library (forgot the title a quick google makes me think it must have been "Practical Television") because the Sherlock Holmes nature of the diagnostic articles was so interesting (I suppose I am odd that way).
I had exactly that problem with a similar TV, it was a dry joint on the connector for the LED backlight strip. Ended up peeling the layers of the LCD apart thinking "this is never going back together" a quick resolder and it did go back together, and even worked perfectly afterwards!
Quite informative; I'll have to see if I can get a board for my older LCD TV that started to flicker a while back. Also makes me wish I hadn't disposed of my other, older TV that wouldn't power on any more
After half a life-time working in server rooms, butchering comps for parts, I let out a very audible "Awww" seeing that diddy lil' heatsink. Was like seeing a photo of a puppy!
As kids in the 70’s, dismantling old TV’s was a great game....
Nowadays I feel sad that we gave so little respect to the beautiful valves...
Those "ISOLATED" vs "LIVE" markings on the power board are so serious for something almost no one will see. It's even got them around the screw terminals on the live side. Combined with the black on yellow board? I like it.
I wondered why television repair isn't a business anymore but I think this is part of the reason
These are fun to convert into lightboxes. Extremely easy to do and they're super bright. Could go the extra mile and memorize brightness and other picture adjustment settings to have a cheap/free adjustable LED light array that makes for a wonderful base for a lot of applications; a work light above a stationary tool, camera/film lighting, and simple residential lighting options being some examples.
I did on-site-warranty-repair-of-flat-screen-tv's ten years ago. There were two kinds of problems. Ten years ago was the era of "bad caps" that would last three thousand hours and die. That meant replacing the power board. The other problem resulted from the fact that it was possible to buy an HDTV before the cable company supplied HD to your house. When the cable company upgraded the box there would be color bleed on the screen where it should have been black. This meant replacing the LVDS cable which meant snaking it under sheet metal with sharp edges and hoping you did not cut yourself "in the field". The new cable had more twists per inch than the cable it replaced.
I did work experience for Pioneer maybe almost 20 years ago now. They were a much more popular brand back then when home hi-fi systems were still popular and DVD players were new to the consumer market. Even back then, most consumer electronics they produced were down to about three components that you just swapped if there was a fault. A DVD player for example was power supply board, main board and the drive mechanism. I was surprised how little electronics knowledge was needed to be a technician. Another interesting thing was that the first thing we did when servicing a DVD player was plug into a programming connector and disable Macrovision. I guess this was to eliminate this as a possible cause of issues, then we'd "forget" to re-enable it.
vestel has a ground fault protection on their power boards, especially for backlight driving scheme, if it senses high static electricity, it cuts off the backlight until its discharged and make it think its all clear.
I lived in a condo complex, loved collecting LCDs that people threw out. A lot of times they worked, so it was a free tv for someone living off of almost no money.
Perfect. 😇🤗
Two whole boards! I opened my brother's TV to find the power supply and display circuit/tuner/etc on one.
One resistor and one cap had blown up and left a sooty skid mark. Replaced those, a mosfet, a fuse and 3/4 of the bridge rectifier. The big capacitor was charging but otherwise still no life and that was the limit of my diagnostic skills.
Removed the transformer and a few caps (bridging the hot and cold sides) to "disconnect" the PSU, added a barrel jack and an external 12V 1.5a supply from CPC and it's been working fine on that since.
I had 3 tv's die with display problems, and reconnecting everything seemed to fix 2 of them... I think it's the ribbon Controle cables. They are so delicate, and such, held in with such light connectors, they just come loose over time. If firmly slapping the back/top of your TV makes a difference to the state of the display, then it's time for a connector check.
The 2 survivors are still in service now, with one being over 10 years old. The one that died was a cheap TLC with the same bords in the video, but as I no longer needed it, and it was an obvious power problem, I just stripped it and sold the rest of the components on eBay.
I recently repaired a Sharp tv which was totally dead, no standby light, nothing. I opened it up and found a vestel power supply board. So I looked on FleaBay to see if I could find a spare. Yes, there was, but also a "repair kit" which consisted of 3 schottky diodes and instructions. googling told me the "usual fault" with the boards was that the diodes would fail short circuit. Investigation showed one of 3 paralleled diodes was indeed shorted. 2 OK, but different forward voltage. Bought 10 diodes for less than the price of the repair kit. Selected 3 to match voltage, fitted, yay, fixed :)
As those diodes were spaced away from the board, I guess they were getting hot, and if they were unmatched, the lowest voltage one was taking most current...........................