Replace faulty LED's in Apple Thunderbolt Display. LM27WQ1

First time disassembly. :)

[@avneeshshrotria]

Dude this was insanely good !!! Been scavenging around the Internet for this for almost 6 months . You seem to be only one who has done this to solve this intermittently working issue by actually going to the real problem !!! Really good .... 👌

[@gillesperrotey7619]

Every one can do it with such a tuto. Nothing hard at all. Congrats and many many thanks again and again, this is the only video showing this !!!

[@fd3s7]

Just did this to my display, VERY nerve wracking but it now WORKS! I am so happy I saved my screen! THANK YOU VERY MUCH!

[@florianruhrberg8410]

Big time! Great Video! The first time I see a video like this DIY style! You're an idol in my eyes! Thank you for sharing!I have experience in switching parts, like psu, logic boards or the aio cable. But I hesitated to open the panel. I habe about 4 or 5 with no backlight here, which need some treatment. Now I will go for it, after ordering the necessary spare parts. Thank you, thank you, thank you!!!

[@zoltanrakosi5246]

Thanks :)

[@florianruhrberg8410]

Zoltán Rákosi Do you have a source for the LEDs for the 24” Cinema Display? Thanks in Advance!

[@zoltanrakosi5246]

@@florianruhrberg8410 Sorry. Unfortunately, there is no

[@MonAmiJow]

I Deaply thank you. I Did It with you miscall loop in my room

[@crispypackage3298]

Exzellent Tutorial. Perfect 👍

[@vergelbansill9811]

I'm wondering, where did u get those Led Strips? are they Brighter, Bluer, more than 350 cmd? trying to do mine, led are starting to trying yellowish, trying to upgrade the led to up to 600 nits.

[@sheldonbarnes4125]

I just found this video, and I am about to try it ,but first, does anyone know if it's all possible to upgrade the screen this way. Since it's gonna be opened up anyway I want to know

[@sakurmai]

hi my imac completely blackscreen but when i use torch! i see some pictures is this toturial? work for my black screen?

[@KishoreDuddekunta]

How do you test if LED strips are working ?

[@waynehodl]

Thanks for this video! What screw drivers are needed?

[@zoltanrakosi5246]

Only Torx T-10 screwdriver

[@tykeryuen]

thanks for the video! i replaced the LED two weeks ago and it works only for two week...and then the same problem occur - no backlight. this time even i unplug the power and plugged in again, the backlight still doesnt work. do you have any idea what's wrong with my 27" display :( ? Thanks.

[@zoltanrakosi5246]

These LEDs can only be purchased used and from dismantled monitors. You probably got the wrong LEDs :(

[@lktoysbuilder]

Can i have the link for 24” led strips

[@mrbill2380]

Great repair. Is it still working? I noticed the ebay part you linked is listed as USED (90% new, haha). How is it holding up?

[@zoltanrakosi5246]

It works very well perfectly. I use 8-10 hours a day. ;)

[@holarich2968]

hello! excellent video! Question, where or what type of leds should be used to make the change, or do you have a link to buy, slds

[@zoltanrakosi5246]

www.ebay.com/itm/123412259079

[@thehamachekco9132]

Did the new LEDs result in a brighter display? I have two displays and ordered new LEDs strips for the one that is failing, which will take a month to arrive. I am wondering if I should just order a second set and do both.

[@zoltanrakosi5246]

Nothing will change. A sign of wear and tear is that the LED strip becomes short-circuited and the protection switches it off. There will be no change in brightness or color temperature with the new set. It will just work perfectly again.

[@thehamachekco9132]

@@zoltanrakosi5246 - Just completed my repair with "new" LED strips. Pretty sure the strips were used or new take-offs, but that is something I will take up with the seller. But I can say the display is MUCH brighter. I have all three Thunderbolt displays running and the one with the allegedly new LEDs is much, brighter. Two I run at max brightness. The repaired one I have to dial down three points to get it to match the other two. It also calibrated fine to a color profile as before it was difficult to do.

[@user-zg3kc8ve2k]

Where did you buy LED stripes?

[@0neirocom]

The replacement strips just screw into place? Any soldering required?

[@zoltanrakosi5246]

Nothing needs to be soldered. All you need is a screwdriver.

[@0neirocom]

@@zoltanrakosi5246 Brilliant looking forward to trying it out when the strips arrive. Thanks for recording your method!

[@0neirocom]

Took me a while to set aside the time to get into it but just completed and worked perfectly after finding a loose joint on one of the original LEDs, echoing everyone else's praise on this one your video's detail was invaluable. Huge ups ^_^

[@richardmatos9103]

My screen is going black, what could that be? It will occasionally come back. If i unplug my macbook then plug the thunderbolt back in it will come back but freeze the computer. Ive tried it on two separate macbooks, so i believe it to be the screen. Any help would be greatly appreciated. Also Amazing Video BTW! You're very brave!

[@zoltanrakosi5246]

Probable cable problem. Try connecting with this cable. You have to work with it. www.ebay.com/itm/Genuine-apple-Thunderbolt-to-thunderbolt-cable-cord-2M-male-to-male-white/283644788399?hash=item420a8bfeaf:m:m8yhSXxsekJoifKr8uQqgNw

[@vitalii4329]

Hello, Thank You for the video. At service the was diagnostic and they said that led module is broken, I'm not sure what they meant, cause before monitor fast blinking but normalized the picture with a lower level of brightness (probably 80% of max) and after some time it became just black (camera and sound work), could it be these led strips? And As I can see it's only from one side of the monitor? or should we replace it from both sides? I've noticed only one side) Thank You in advance.

[@zoltanrakosi5246]

Hi, The LEDs may need to be replaced. It has 2 pieces in it and both are at the bottom of the monitor panel.

[@vitalii4329]

@@zoltanrakosi5246 thank You, for help

[@thewatchaa]

I have the same problem as you Vitali. Did you fix it by replacing the LED strips?

[@vitalii4329]

@@thewatchaa yes, the monitor works as expected, bought some from aliexpress for 15$, spent whole day for replacing it, but it worth it. To check If You have problem with less do next: connect Your monitor to mac, take a light, and try to light your screen (really close) to see is there any elements on the screen (windows, icons, regular desktop), and if there are. The problem in leds

[@reanimationxp]

@@vitalii4329 thank you

[@AE-sn7cb]

Nice video, Do you have any experience with the a1267? I have one with this backlight issue. I've searched for replacement Backlights but haven't found any yet. I would be very happy if you could help me.

[@zoltanrakosi5246]

Sorry, Sorry. Unfortunately, there is no.

[@AE-sn7cb]

@@zoltanrakosi5246 Well okay, but thank you for the answer!

[@KernelComics]

Hey Dude, great video :) Do you think is possible to replace the 2K original panel with a brand new 4K one?

[@zoltanrakosi5246]

It will not work. ;)

[@swanasinghe]

Any one knows how to use this moniter with a pc , I mean which doesn't have a thunderbolt port.

[@clasesonlineparaninos3540]

My screen blinks very fast 5 blinks in a second, will it be a fault of the LEDs? or from the power source?

[@zoltanrakosi5246]

i think in this case too the leds have deteriorated.

[@TheDarkgoncho]

can i do this with a1316 apple cinema?

[@zoltanrakosi5246]

Yes

[@robint7253]

Very vrey nice! How did you know you had to replace the backlight display leds? Can you provide some reference for the leds you bought? (I also have no more backlight on my thunderbolt display)

[@zoltanrakosi5246]

After 5 to 10 minutes of use, the backlight was turned off but the monitor was working and the display was on. Backlight only works when the power plug is pulled out and plugged in again. If I reduced the brightness, it will not turn off. Because of the LEDs' warming up, they have been shut down and protection has turned off the entire backlight. That's why it had to be replaced. www.ebay.com/itm/2pcs-LED-strip-For-Apple-27-laptop-LM270WQ1-SDC2-M270WQ1-SDA2-SDB1-SDE3-SDE5/123412259079?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

[@robint7253]

Thanks-a-lot. For the record, I found the following answer, on the ifixit forum: fr.ifixit.com/R%C3%A9ponses/Afficher/169538/What+components+need+replacing+on+the+Logic+board#answer471780 It convinced me that Apple cinema/thunderbolt displays backlight problems come from the LEDs ageing and NOT a faulty PWM signals (backlight intensity) given by the HV9982 chip. I will try to repair the screen as soon as I receive the leds, thanks again Zoltán!

[@dodee1130]

@@zoltanrakosi5246 Thank you for the video - i am going to try this too - one question - the tape you used to replace the silver tape was what ? anything special non conductive ?

[@zoltanrakosi5246]

Do Dee You have to use this. Not that you see in the video :) rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.es%2Fulk%2Fitm%2F122798707696

[@dodee1130]

@@zoltanrakosi5246 Thank you - ordered and hope to do the repair soon ;)

[@derekp9737]

How can one test if its the led's vs some other issue?

[@zoltanrakosi5246]

if the led is bad, the monitor turns off after a few minutes of use. And the new LED is after replacement. I still don't use the monitor in the video and it washes flawlessly.

[@nico7546]

hallo sehr gute video meine frage wo kann ich backleit kaufen? mfg,

[@zoltanrakosi5246]

es.aliexpress.com/item/32861593637.html?spm=a2g0s.9042311.0.0.2ed663c0kQE4jN

[@nico7546]

@@zoltanrakosi5246 VIELEN; VIELEN DANK!!!!!!

[@artistnyc123]

I think the real issue with these monitors is figuring out what the hell is wrong with them. Mine can work perfectly for about 30 minutes before blanking off. So is at the display?, is it the power supply?, and besides that, I've never got the speakers to work. I bought a second-hand unit that looks absolutely pristine, not a scratch, all the rubber on the plugs is smooth it looks brand new out of the package yet I can't get it to work for more than 30 minutes.

[@artistnyc123]

I also tried the Male 2 Male Apple Thunderbolt cable, it had zero effect.

[@zoltanrakosi5246]

Yes. this was also the problem. if you lower the brightness, it will last longer. The LEDs overheat and the monitor protection switches off the LEDs. the leds are getting old. based on the video, if you replace it, it will work properly again. I still use this monitor that is in the video. in your other monitor, with a high probability, it will work again by replacing the coupled cable!

[@jackweterings5009]

Where to bay the LED?

[@zoltanrakosi5246]

www.ebay.com/itm/2pcs-LED-strip-For-Apple-27-laptop-LM270WQ1-SDC2-M270WQ1-SDA2-SDB1-SDE3-SDE5/123412259079?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

[@jackweterings5009]

👍

[@mgkravik]

Ebay listings are for used LEDs... is that a good idea ?@@zoltanrakosi5246