Imagine getting into electronics as a child now. You have no chance of playing with old stuff and seeing how it all works - glad I am in my 50s and enjoyed "proper" electronics in my youth.
I know exactly how you feel, I’m the wrong side of 70 and grew up studying valves then transistors right through to the programming of microprocessors and digital control systems. Today’s faultfinding is mainly limited to board replacement by technicians following self diagnosis instructions from the faulty equipment. Component replacement is sadly a thing of the past.
Excellent job Michael. The government is always bleating about recycling everything and stopping stuff going to landfill but manufacturers go out of their way to make things unrepairable so they end up as landfill anyway. Wish I could invent a time machine and go back to the days when we could actually get parts / manuals and actually fix stuff. Electronics repair used to be an enjoyable job but not any more, I wasn't taught to be a panel changer.
@@michaeldranfield7140 your repair was greatly appreciated by the thousands of viewers you regularly educate. And technical education in this modern world is of utmost importance, ( seeing how the school system has largely failed at this.)
I wonder if „infusing“ the tape with 90%+ IPA would have helped dissolving the glue a bit. Works pretty well with glued in laptop/phone batteries without that pull strip. Your persistence & experience along with an always very thoughtful approach are inspiring! 👏
You could well be right but I have always been very sceptical about poring a liquid onto a LCD panel in case it damages the bond between the two glass plates .
this is right, not a job you could do to make a living but it was an interesting insight into how the manufactured make them as difficult to repair as possible , .
I know of a tv engineer that decided to call it a day when the led tv's were the only ones that were coming in for repair. They caused him so much grief and time spent wrestling with them. I so miss the analogue days and good luck those that like today's challenge.
I think it may be time to call it a day if everyone starts cutting costs and glue the screen in , like you I miss the analogue days , if only we could go back .
Smacks of some Sony sets I’ve encountered,I use a piece of plastic bottle cut out and it works a treat Nice and thin but strong enough for the job!well done on completing the job! Manufacturers always coming up with ways to stop repairs.
This was my first time on a glued in panel so I had no idea what to use , in fact I didn't even think this was going to be possible to remove the glass without cracking its so thin .
That was more like repairing a super large iPad! All phone screens are stuck down these days but trying to remove a large thin piece of glass like you did, is a different ball game. I’d be so nervous about cracking it. Well done.
Well done Michael! I was a professional, component level electronics engineer working in the audio industry for all my working life. I am now 70, and have taken to restoring old cars for a hobby (don't ask me why!) anyhow, strong double sided foam tape holding things together is rife in the car world. I have found a wonderful product sold by CPC called Sticky Stuff Remover. All you would have needed to do is squirt some of it along the edge of the double sided tape (possibly using a syringe) and leave it as long as you can be bothered. The bond will just let go. It is also fantastic to remove the remnants of the old tape. Only drawback, you have to clean the surfaces thoroughly with some IPA before anything else will stick to it.
That's good call, or the CPC own brand 'Pro Power' label remover (maybe similar stuff) Orange based, disolves sticky stuff as you say. Also a bit of heat works wonders.
I use to have some stuff years ago that smelt like oranges for removing sticky labels and it worked very well but putting a liquid onto an LCD panel worries me incase it damages the bond between the two glass plates .
Well done!! Built in obsolescence comes to try to defeat us but engineering skill and ingenuity wins out. I remember the same situation when mass produced VHS machines flooded the market and made commercial repair non viable. We need a Right to Repair that means something.
The very last generation VCR s made I believe by Funai were as you say not economically repairable due to the fact they soldered all the bits on the deck directly to the board, no plugs and sockets, so It made a simple job into a difficult and time consuming job for an item that cost so little to buy new .
When I see a complicated repair like this, I really wish that CRTs will make a comeback, as they are much easier to repair. I never really liked flatscreens, since they came on the market with plasma models making their debut !
all I can say is Im glad I grew up in the 70s with CRT technology, the only time I liked flat screen sets is when they first came out and they cost a fortune and people didn't mind paying to have one repaired but now you can buy so cheaply its more or less game over .
@@michaeldranfield7140 I can vouch for that. I had a Sony 46" LCD TV Model Number KDL-46BX450 from 2012 before and quite expensive at the time. This flat screen did not even run the estimated hours it claimed. It was maybe hovering between 10000 and 20000 hours, equating to about 7 years of my watching time (I did not watch TV that much), before something burnt. On closer inspection, the smell was coming from the power supply. So, I ordered the replacement part from the States, hoping that this was the culprit, but no joy. Something else also got fried in the process. As this was beyond my capabilities, I took the set into a specialist technician, who quoted me more to repair, than the cost of another telly. I now have a Panasonic 49" LED TV Model Number TH-49GS520Q from 2020. This set has run minimal hours so far. But here's the thing, this is a cheap "knockoff model" for the South African market and not a true and genuine Panasonic. I cannot even get the exact specifications for this model on the internet. However, it is still working and I am satisfied at least.
Thank you for sharing this educational and interesting video with us. If the TV is so difficult to repair and is obviously not designed to be repaired then why do they sell the spares (i.e. the new LED light strips)? Give me a proper cathode ray tube TV any day!
I didn't realise when I took the job on the screen was glued in , it was only when I came to order the new backlights I couldn't understand why they were so cheap my suppliers didn't have them in stock and delivery time was 4-6 weeks , now I can see ,they don't keep them in stock because no one is buying them !
Dear Michael. Wow. Your patience knows no limits. As a company involved with servicing many sets a day we tried to do what you have done with the first one of those sets and decided never again. Kind regards Allan.
Hi Michael, i just repaired a Hisense 43ae7200 with red led flashing, i managed to lift the plastic bezel where the screen is mounted on, so the screen it comes of with te plastic support, and there was one LED broken, a set of LED's was not available so i made a bridge on the bad led, now the set works but it is still a lot of work, greetings from France.
Thanks for the video tutorial. It helped me. I wouldn't think of trimming with flexo tape. I planned to cut the double-sided tape with an old razor. I wanted to bend the razor 90 degrees and pull and cut. Now I find that a strip is enough. Thanks for the tutorial.
What a pain, as you said, these were never made to be repaired, my GEC (Hitachi) TV is from 1982 & still going strong & never needed any repairs other than a squirt of Servisol for a noisy volume pot! I got out of the trade in the late 80's, but still fixing tellies....
Well done Michael, a master at work with the patience of a saint! Seems to be a race to the bottom with these TV manufacturers. 'Losense', no I won't ever buy one after seeing this!
Excellent job repairing this TV. If anyone is attempting this same repair I would suggest leaving the protective film on the adhesive tape and peeling only a small section outward creating a pull tab. This would allow position the screen then pull the tab slowly to remove the protective film. This a technique used for applications of decals so it should work just fine.
Back in the 70 s earley 80s when a new model only came out every 18 months or so you would become an expert in your field as you had the time to learn, now I never seem to see the same set twice the models change so often.
An excellent example of a product made as cheaply as possible. Even the led backlights have been cut down to 2 rails. No doubt pushed to their limit so an extremely short lifespan.
@@michaeldranfield7140 Exactly. Our Samsung curved telly has a clipped on back. No doubt I'll have to remove it someday. The brightness is turned down to delay that day. My Wife hasn't noticed. I did that months ago!
@@colintinker7778 dreadful things those screwless backs, I have the special tool for removing them but some sets use double sided tape as well and curved screens just crack on there own .
Michael, my condolences. These hisense products are absolute trash. I had a 65" hisense with backlight failure and I struggled to remove the led reflector paper. It was glued in so many places that I could not remove it without creasing it a lot. The end result was a crinkle cut reflector paper that was causing dark patches due to the light being blocked by these wrinkly curves of the paper on the edges. I explained to the client that these sets are designed to be thrown away once the back lights have failed and that's why you don't get a perfect picture. If I wanted it better then I could have thrown the reflector paper away and painted the inside with white gloss paint. Then placed the led strips directly on the painted surface. Used special tape to keep the wires flat down. The end result is a almost perfect picture. I was surprised with the result.
This is becoming more and more common with electronics as manufacturers discover savings through adhesives. It also helps them to persuade customers to not have products repaired and buy a new product. I realised things were getting bad when the first thing you often see in the owners manual nowadays is 'How to dispose of this item responsibly' - not what you want to read when you've only just bought it.....!!! The marketing guys will tell you that it's in our interest as it makes the product thinner/lighter and 90% more recyclable. To think I used to complain about Thorn 3000 chassis blowing R2010 chopper transistors.
as you say no only does it save a bit of money having no plastic bezel round the edge but it also makes it more un likely that you will have it repaired , I have a Thorn 3500 for restoration but not got round to it as yet .
I'm too old for this unrepairable technology, bring back valve set's 😂 I bought some of that VHB tape and it's stupidly expensive, not for a TV repair either. Well done on that one Michael, more patience than me these days 👍
definitely only designed for assembly, and if it fails, tough! bit like a ferguson 354U radio from the late 50s/early 60s, you have to remove the dial escutcheon to remove the dial knob to get the insides(pcb) out, and that escutcheon is held in by metal fingers pushing through slits in the cabinet front being twisted over inside ! you'd likely remove and refit once but if it needs to come out again, risking breaking them off!
Not a PL36 in sight! Very well done on that repair, I think the moral of the story is to keep the brightness of these 'led flatpanel contraptions' to a minimum acceptable level for any hope of a reasonable length of service!
I keep telling my friends exactly that. Keep the brightness as low as possible and never more than 90%. The Dell monitor that I'm using right now is set to 60% and it's perfect.
I have an idea for making a valve amplifier with a couple of PL36 s , just not got round to it yet . I always turn down the backlight setting doen to 60% and no one has complained yet so yes this is good advice .
@Michael Dranfield What is bad is that the Chinese manufacturers know that the leds will burn out if the back light setting is bright, turning g the set into junk. If they wanted to, they could put more back-light leds in and run them at a sustainable power. But they won't!
Sadly this is what comes of having TV's getting thinner and almost bezel free. It's almost like an extra large mobile phone with that double sided tape holding the LCD in. Great job getting that out without damage. I guess this is probably the kind of job you'd only do for yourself with all the risk involved.
I know something stronger than a ribbon cable. It's the see through molded packaging. I think it's PET ? So I cut little sheets to use as a prying cutting tool before throwing it in the bin.
I'm certainly not a professional TV technician, but I would remove the film from the double-sided adhesive tape only after I put the LCD panel back in place.
It is just amazing that you managed to remove the panel without breaking it and then glue it back in place so perfectly aligned. Thanks for showing us the whole process and pointing out the need to use foam tape. Well done. Just now another youtuber has uploaded a video doing the same repair on an almost identical Hisense TV with a glued panel. In the video he is able to simply unclip the plastic frame with the panel still glued from the metal chasis, thus making the repair much easier. I wonder if this was also possible with your TV. Here is the link, the unclipping starts at 5:00: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wLx-6oqdyzg.html
I have got my hisense backlight working now. Now I have to remove the glue on the screen I am in a dilemma,I want to order a thin black tape to go over the screen at the end and glue it to the frame
I would only recommend using the tape in the video as it allows the screen to flex when it heats up , ordinary double sided tape is no good for a panel of this size .
this is the problem these days , a lot of stuff is just not economically repairable , this set was a learning curve , I have since turned a couple away with glued in screens .
Ahhh doh haha! I’m sorry I was in bits about your pals story and the screen falling out haha ahh man that’s a nightmare 😂😂😂 Can hear the customers moaning already “you botched the screen in” jeez poor guy 😭 Thanks Mike, I’ve come across a couple my self and done a smash one a couple 🙈
Also I use thermal plaster to glue the leds down and e7000 to glue the panel. I’ve a thin metal shim tool for tablet screens I use, just cuts right into the adhesive.
Best way to cut throught the glue.Use a hair dryer on the edges to soften the glue.Dont overdo it ,no need to get the panel scalding hot,it may cause damage.Then use a plastic card from a card deck made for poker,since its plastic and quite durable.Thank me later.
Wondering where did you source the replacement LED strips? I am a Hisense service agent but Hisense do not supply backlights aa replacement spare part and am losing quite a bit of potential charge work as a result. I mostly find suitable replacements for other brands from Aliexpress but none available for Hisense.
I got them from ASWO in France , strange they wont sell you parts as these were genuine Hi sense LED bars. If your looking for a load of Hi sense sets though I could help you out , I have quite a few brand new Hi sense sets here that were damaged in transit , all screens broken if your interested ?
How would you go on if the panel had cracked? Do you let the client know of any risks beforehand, in jobs like this? For example some of the stuff I have in here has very brittle plastic that can easily shatter just by trying to open it, so the client gets a pile of bits back that actually arrived looking intact. I've heard of repairmen getting sued for damage.
I always tell the customer of the risk first , most people will say it doesn't work anyway so there's nothing to lose, but if someone is not willing to take the risk I just give the set back .
I wouldnt use any tape michael, i would use clear silicone, a hairdryer will soften this adhesive m8, once this foam tape is in place run the hairdryer over it to bed it in.
There was no doubt in my mind that you would fix it!! However, what a dreadful build standard with glue and tape everywhere. At least with a Samsung (the only one I have done) , the thing comes apart easily and the backlight strips are copper backed, rather than aluminium for better heat transfer.
I have never actually seen the command strip so cant say but this tape I used is very funny stuff , it does not feel very sticky until you put it on something , then when its on it wont come off and any attempt to peel it and it just stretches very thin like rubber .
I have this exact tv and was wondering if there was a service menu on these? Ive seen on google many people say about a service menu for these hisense tvs but it doesnt work for this one. Im trying to get it go turn on after power off but it doesnt even though its set in the menu.
First class job but Hisense should be a shame to make a set which will end in a land fill after warrant run's out just like the other Chinese manufacturers plus vestel which have so far not glued the screen's as far as I know
Even though I'm "technical" and I build computers, if I had to repair that TV, it'd go back to the customer in a bucket! 🤣 EDIT: I have a 2 year old 50" 4K Hisense TV, and the screen is perfect, no DSE, no faulty pixels, and it's a cracking TV! ... I've probably jinxed it now? 🤣 Blimey! So, my fancy Hisense 4K TV is SELLOTAPED together? 👎🤣
@@mmwaashumslowww7167 - I only buy Samsung and Vizio and Sony. My Vizio is 14 years old. Still a Perfect picture!! I have the suction cups and LED tester made for TV's just in case a TV of mine fails. I'll do it myself...
why cant manufacturer make simple removable back plate for easy replacement of led backlights. this way its designed not to be repaired . the whole world will be full of E waste because manufacturers want profit
That would solve the problem and I did see this done many , many years ago on a computer monitor, a removable plate at the bottom of the screen to give access to the CCFL tubes .
