Lenovo ThinkPad T450s with No Backlight after new LCD - LFC

[@Snipermac99]

Watching Grahams initial fight with the keyboard was nightmare fuel.

[@beandrive]

Good thing that they changed the design back.

[@redfrog2100]

i finally get a clear explanation on why you must disconnecting the buttery while messing with the screen thanks

[@RWL2012]

or battery...? :P

[@sbrewski27]

@@RWL2012 Toast :P

[@JoshuaG]

Any kind of operation on the laptop needs the battery disconnected really, its kinda SOP and a good habit to make sure. 🙂

[@warenmann1042]

Man I hate when I have parts left over or maybe it was a spare, if not check time 2:46, that's where that hold down bracket goes. It's good to know that I am not the only one that has parts left over sometimes. Good video, Good Job...

[@reubennaidoo1088]

Hi there. Just some info: if you removed the 2 rubber tabs under the external removable battery, you would have been able to slide the keyboard cover back easily using the 2 indents on the the left and right of the keyboard, exposing the screws to undo the keyboard. Secondly, the internal battery can be disabled in the bios to make it easier before working on the logic board or lcd.

[@Adamant_IT]

I'll keep an eye out for those rubber tabs if I see one of these again! I've actually seen one of these before a long time ago, and don't remember having so much trouble with the keyboard. I figured this one was just stiff or something.

[@Com2Bo]

I love old thinkpads, nice to view.

[@jasonkesner6063]

I know this video is old but thank you for the info. I did this exact same thing to my wife's lap top last week and it blew the lcd backlighting fuse. I would have sent the lcd back and given up. Thank you so much for this up load. (P.S.) her board was different from yous so I had to find the fuse but no bigge and I had to rob the fuse from an old dell laptop.

[@zx8401ztv]

Thankyou graham, i always enjoy watching the repairs :-D Two batterys that's a worry as 10-19 volts is always present in the lcd.

[@carlosgarciaoropeza5480]

I agree. Sincere thanks for your answer. Removing the Connectors as done here is absolutely fine. If I want to be sure, I use a single wire with double alligator terminals. One alligator direct to ground (screw hole) and on the other alligator add any 1W [1 - 15] ohm resistor to touch each individual pin. Damaged test terminals (power supply or a multimeter), previously measuring the continuity of the wire to be used, serve this purpose. On the other hand, already skirting the limits of exaggeration; I cover with black or kapton tape the cable that goes to the screen and also the connector on the motherboard. I do this to any laptop. All the best.

[@sam10alx]

Exactly the same malfunction on my ThinkPad T440: display backlight not working. I replaced the F7 fuse (as shown in the video) and now it's working perfectly. Amazing! Thanks for this video!!!

[@mrwillbarnz]

Really interesting repair, part of my job is looking after a fleet of these laptops. While I like the modularity of the design, it's far too easy to get caught out by the Internal batteries in these. You can turn the charging circuit off for the internal battery in the UEFI by pressing Enter, F1, and under Power there is the 'Disable Internal Battery' option at the very end of the list. This will even work on devices with a BIOS Supervisor Password or Power-On-Password applied to the laptop, you just need to press the enter key again when prompted. The battery is enabled again once the charger is plugged back into the laptop.

[@Adamant_IT]

Interesting! A lot of overengineering purely for the sake of being able to hot-swap batteries it seems. I've never heard of anyone who's actually _needed_ to be able to hot-swap a battery though.

[@carstendahlhjarup8783]

thanks for tip, I strongly recommend this to people if water is spilled on PC. Then right away enable "battery disable" this helps prevent further electrical corrosion. Cool

[@ruffrider2626]

I had this issue happen to me when I changed the LCD. I pulled the main battery. I didn't disconnect the 2nd internal battery, and it blew out the backlight fuse on the motherboard. I don't have access to the tools, nor access to folks like you that fix this sort of thing, so I only had the option for a new motherboard.

[@TomsManShed]

more addictive viewing...great vid Graham....wouldn't it be great if they had external fuses under a flap like a car...pull old one out ...push new one in :)

[@ChasLarge]

NOPE, cos if they did that, customers would replace the fuse, it goes bang and they then put a bigger one in or a shorting link across it. Then they bring it to a repairer and say "dunno what's wrong wiv it, it just stopped". Repairer has a ten times more difficult job to fix it. Been there, got the Tee Shirt, book, badge and plenty of kit that customers "broke" trying to repair it themselves. That's why they put labels on like "NO CONSUMER REPAIRABLE PARTS INSIDE". If it can't be fixed by turning it off and on again, leave it to the experts like Graham.

[@cattflap1447]

@@ChasLarge Exactly this ^^ 🤣🤣

[@TomsManShed]

@@ChasLarge Yep good point CIL...hadn't thought of that ...you are of course correct

[@TomsManShed]

@@cattflap1447 yep Furry you are both right

[@brecht4713]

Aaaah, your first Thinkpad disassemble! You'll learn, my son, you'll learn! 😁😉👌

[@Adamant_IT]

big mood 😩

[@brecht4713]

@@Adamant_IT I remember the first time I had to replace a keyboard on a Thinkpad X240. I had to strip down the laptop completely... I think Lenovo has frustrated designers 😁

[@rainerbehrendt9330]

@@brecht4713 Why? There's always a Thinkpad HMM (Hardware Maintenance Manual) with all the Steps. The Keyboard should be easy. Look at the underside of the Thinkpad. There should be 2 or mor screws with a keyboard symbol. Take this out and then it's only a simple push in direction of the screen and the keyboard is free.

[@brecht4713]

@@rainerbehrendt9330 That is exactly what I did. Believe me, for the X240 you have to remove everything to replace the keyboard. Look it up if you want 😉

[@rainerbehrendt9330]

I stand corrected. Sorry. Took a quick look into the X240 HMM. For access, remove the following FRUs in order: • “1010 External battery pack” on page 59 • “1020 Base cover assembly” on page 59 • “1030 Internal battery pack” on page 60 • “1040 Memory module” on page 62 • “1050 Hard disk drive or solid-state drive and drive cable” on page 62 • “1060 Wireless-LAN card” on page 65 • “1070 Wireless-WAN card or M.2 solid-state drive” on page 66 • “1120 Speaker assembly” on page 74 • “1110 Coin-cell battery” on page 73 • “1080 Fan assembly” on page 67 and two more steps. This is crazy. Not comparable to the T or P Series i own or owned.

[@Kubika1995]

When you want to remove keyboard in Thinkpad in models like T440/T450 under external battery are 2 rubber plugs, when you remove it before it will be a lot easier to remove this keyboard.

[@josephking6515]

The T440p is different from the T440 & T440s. The T440p only has 2 or 4 screws that are revealed when the keyboard "cover" is slide up to expose them. The back cover is a dream to remove with only 2 screws holding it in. Just remember to slide the back cover off the clips. Being used to earlier Lenovos I went and pried the cover off and broke 13 clips in the process. Fortunately Lenovo were very good and replace the AUD$103 back cover under warranty. 🤫

[@Kubika1995]

@@josephking6515 I have already T440p, this laptop is really great for upgrading. Now my T440p has FHD IPS display, 16GB RAM, i7-4702MQ and 2nd drive in DVD drive bay. If we can compare stricte cpu performance, this i7 is comparable to i7 8. gen, for me it`s a beast. I want to buy eGPU but WLAN/WWAN white list block eGPU adapter and i have to modify bios dump.

[@robertomata5054]

Just need to make sure the second battery is disabled in the bios prior so there is no need to open it up to disconnect it, I replaced the screen on my Thinkpad T440 which is very similar to this and had no issues. The battery should be automatically re-enabled after startup, really enjoyed the video

[@0o0KING0o0-YT]

Andy yeah, up until recently, most of these Thinkpads had dual batteries. I've learned to disable internal battery in BIOS prior to doing any work on them if they're still able to power up.

[@IIGrayfoxII]

Best thing to do is isolate it by disconnecting it physically. Never rely on software to isolate power from a physical device.

[@MrTarmonbarry]

@@IIGrayfoxII Yes , cant beat breaking the physical connection

[@gxc90]

Though I feel bad for the guy who did this without knowing that there was a 2nd battery in the laptop that he had to disconnect as well. :( From Graham's perspective, I agree, very poor design for serviceability.

[@IIGrayfoxII]

@@gxc90 I have not worked on laptops in years, but quickly saw that the the unit had an internal battery. The internal battery did not look like a random bit of hardware a laptop would have(even a business based one), the connector on it looked like it could handle some amps. It looked like a typical internal battery. I also tend to look at labels of hardware to know what it is.

[@SPEXWISE]

Liking the jazzy liquid DNB tunes.

[@BaRT3234]

F25 going on a magical journey :D

[@paulchambers8270]

Older Lenovo’s much easier to work on and upgrade for sure. Also when they have second battery you can disable that in BIOS. It’s on Lenovo repair guide videos

[@beandrive]

I agree, they later changed back to a better design, but you still have to disable the internal battery thru the bios before working on these machines.

[@sleepwalker6825]

Cheers Graham .... Bad luck for the owner on that one ( Dual battery Combo ).. But maybe a 20 second Hold down of the Power button to drain any remaining power may not have gone a miss .... And the Machine would have powered Up ..

[@markg3506]

Nice job Graham. I've had some of those laptops aswell, and hated the way they are assembled, especially the keyboard.

[@sharjeelarshad1]

Lenovo x390 ThinkPad 13.3 inches backlight ..Do you know where on the board I can find the fuse etc..LCD screen I got a new one and it works. I forgot to disconnect the battery while changing the LCD

[@001snapshot]

I do break/fix work and work on lenovos nearly every day. Those models have a bios option to turn off internal battery. In this case if the LCD was totally gone and there was no way to connect an external monitor you simply could not do it. The HMM is readily available to any one on lenovos support web site. AND YES those KBs are a PITA if they are gummed up...:)

[@XodiumLabs]

"We are WinRAR" never gets old.

[@PSHomebrew]

I use 7zip

[@RWL2012]

I only recently found out that the never expiring free trial is because of companies that are only allowed to have paid software!

[@lawrencem.konway7838]

You are a good teacher

[@isahbello7318]

I've achieved alot following your troubleshooting guide, thank you sir.

[@Retroornew]

ok i gotta ask where do you get the background music from?

[@claytonbivens4941]

What was the music in the background during the tear-down?

[@0o0KING0o0-YT]

With those Lenovo keyboards, if the laptop is fairly new, once you remove the few keyboard screws in back they're typically fairly easy to slid the bezel up to reveal the screws. But, I've run into this before where a laptop has been used and abused where the bezel is stuck just like that 1. Probably had some crap in there like liquid that had gotten sticky or crumbs that jammed it up.

[@deelkar]

These sliding bezels are only a good idea as long as there is nothing interfering or sticking. Otherwise they are an absolute pain.

[@glock21guy]

I'm watching the playlist and I saw you complain about gaming laptops being bad with the HP Omen in the last one, and then I see this and my first thought was that I'd rather have 4 Omens to take apart vs one of these. I had an Omen that I removed the board on. It wasn't as bad as this thing.

[@HueMongus101]

I have a T470 and there are 2 screws I have to remove from the bottom that hold the keyboard. I then slide the keyboard towards the display to expose the metal tabs that hold the keyboard in place, and then can pop the full keyboard out. It is a lot easier than what is shown

[@mondecruel1866]

i dont have fuse for replacing f7 mine is dead also same situation with the screen change i dont know anything about electronic, can i just put some solder tin to make a bridge or my laptop will take fire ?

[@dennisadams819]

Good Show Graham

[@SummerSideOfLife]

T430s Nightmare keyboard. However, between ctrl & windows key (left) - prtsc & ctrl (right) each side is one small lock snaps like this ( - ) press them in with a small head flat screw drivers. soft push makes the frame easier to open and get to the screws. I never knew about the F 7 now I do. Thanks.

[@gabeed5890]

I have this exact same problem, where can I buy the replacement fuse from?

[@youssefahourri3245]

I have an old Compaq 610 with no backlight, the problem is that I can't find the fuse on the board even on the schematic. The fuses on the screen board are good. Any help 🤔🤔🤔

[@youssefahourri3245]

@@anshadedavana thank you for your answer 1 - yes there's a resistor on the rail BKLT_EN it has 0.5♎ it's not faulty AND EVEN 19V comes until the LCD connector 2 - yup Compaq 610 doesn't have CCFL Maybe it's a problem caused by the components on the screen itself

[@andreiandrei9536]

I have sony laptop , when i started the laptop abaut 2 minits the backlight is stopit , then i reput the conector is lightin about 2 minits , I dont endestud what is the problem .

[@ralfeversmeyer4010]

Thank you for the superb video and the good explanations. I decided not to fix the display backlight as a DIY job after watching the video :-)

[@jeisontaveras3588]

Where did you bought the replacement fuse ? Or how can I fix it

[@lordbobrules]

3:55 no scratch, 4:20 scratch. I usually put down blue tape to help, I see you use metal tools for prying, plastic pry tools suck and I prefer metal ones too. Great video's!

[@emmanuelvalmas5648]

So a question regarding the most important part, the diagnosis. The fuses were measured in continuity mode? A short beep indicates continuity which should be present on a fuse and no beep indicates infinite open line so the fuse is blown?

[@Adamant_IT]

Correct, yes

[@ShailesHwar]

Hello, I do have an issue in my dell laptop where backlight of LCD is on, but i cannot see any pictures its dark in internal display but brightness of LCD can be adjusted but there are no images in the display. Which means i should go for new display ? Alternatively i am using my monitor for now it is working well it that. but can you suggest a solution for this problem

[@rahulkanth93]

Helo sir help me to guide my lenovo t450s sometime display working some time not when i connected external monitor mother board is working but lenovo lcd not on and keyboard not working

[@adamouguero9364]

hello me I have a problem with my thinkpad t450 it is not displayed on my screen there is always a black screen

[@Theutmostgeek]

Hi, I am having the same issue with my thinkpad t440. What I believed to had happen was that I dropped the laptop and the screen was destroyed and the cables may have shorted each other out during that event. Do you know where I can get that resistor for the backlight? If not can I send the laptop to get fixed?

[@Zolga00]

that fuse almost went to the 9th dimension

[@jacklisiak]

I have fixed my laptop, thank you!

[@jonathanmedellin5006]

My friend, thank you for this video. I was looking for an abnormaly on the screen of my laptop (screen with backlight but there's not image). So I tried to check if the conector was loosen or something else but I didn't know about 2nd battery and only watched a small electric discharge (short circuit) damm... :/ Yet I can watch image after that, I'll try with your information. May you share what's the rated value of the fuse please? Again thank you

[@Kaffarov97]

Would be curious if his display brightness worked as the T450s has a display whitelist where if you don't get a Lenovo approved panel it wont work.

[@abidibrahim]

Please part number of that replacement fuse if possible?

[@waldevv]

Ah memories, I had one of these as a work laptop for like 5 years. Definitely could've used an SSD but it didn't belong to me so I couldn't touch it and it just started to frustrate me, battery only lasted an hour in the end as well. Wish I could've kept it instead of it most likely getting binned but they gave me a P11s with a Ryzen 7 and 32 gigs of ram so I'm not complaining

[@cerritfiedpirate3537]

My lcd backlight not working or lcd died How to find that out I got access to multi meter Solder, hot air station etc Laptop T450 It was always on fulll brightness died today

[@Kreska0]

Stupid question, can you put Fuse or capacitor or resistor the wrong way? "Upside down" ??

[@Adamant_IT]

Fuses are non-polarised, so work any way up. They're just a bit of wire after all, albeit a bit of wire that's designed to break under specific conditions. Capacitors it depends. MLCC, the little brown guys, are also non-polarised and go in any way. However, you also get polarised capacitors which have a positive terminal. They're generally the bigger bois, and are marked with a + or a Line at one end.

[@IIGrayfoxII]

If by upside down you mean + to ground and - to power Yes and No Polarity matters on diodes and on electrolytic capacitors. Otherwise polarity does not matter on a fuse, resistor or a non electrolytic capacitor. If unsure, match polarity. But if you mean have the component physically upside down on the PCB. It wont hurt assuming the top of the component has the metal tab for solder to make a connection against.

[@VladekR]

Great Tip, thank you 👍👍👍 Except, I used Sorin's "calibrated fuse", works well 😂

[@captainrag]

What's the music track on this video?

[@jasonjazzz5]

I was thinking the same thing watching the timelapse of you trying to take that keyboard out...

[@Dejan357]

You can also disconnect the internal battery from the BIOS for servicing, you don't need to open the laptop to do it. You do need to know that it's there.

[@beandrive]

Yes, do your research prior to servicing these units.

[@Vinnie2x]

All that for a fuse. 🏋️‍♀️ Excellent!

[@devonoved7]

Late question: is the power rail still hot after disabling the Battery from the BIOS?

[@WarhavenSC]

I remember back in the day being told, "Never hot-plug an ADB device into your Mac." I had done it a million times because I didn't want to shut down the computer, without consequence. Until ONE day... magic smoke from my fancy Kensington Trackball. Blew out the infrared sensors.

[@papiezguwniak]

Awesome channel. Subbed.

[@kimshotvlogaim3196]

When i buy fuse laptop, i have same problem Asus aspire 5353 dim light,

[@QuentinStephens]

What do you think of using a conductive glue instead of soldering?

[@Adamant_IT]

Sounds interesting, but sounds like a DIY bodge... useful for someone with no tools, but easily outclassed with any other soldering equipment. I haven't looked into it at all though, so I'm guessing here...

[@gdthegreat]

I also changed the LCD and brightness stopped working, in windows 10. but, when I installed Ubuntu Linux on it, it works like charm, so I can assume here that no hardware issue here, as it works on Ubuntu. Could you please tell any software fix, apart from updating drivers, as I tried many but not succeeded at it?

[@PabloDeGales]

Mr Adamant IT have you ever replaced a cardpop LCD light sensor on a Lenovo flex laptop? I don't have skills to change fuses and convinced cardpop is the problem. Your channel is great and I have learned a lot thanks.

[@pcruns]

Hi Adamant IT, I have a Lenovo T470 with a cracked screen. When turned on the screen went on showing that it is broken. I purchased a replacement screen and when installed it will not work. Nothing shows at all. Using the HDMI port, I get a normal image on a different monitor. Does this mean that I am having the same issue that you had in this video? Or does this mean that I have a different issue? Maybe the screen is a DOA? Could you please let me know what might be happening here with my situation? Thanks, Also, love your channel! John

[@creepy_3031]

Yay. Guess I’ll have to do some SMD Soldering now… Same issue on my T14 here

[@OrionHartwick]

great video

[@PempheroSiliyatheMrEngineer]

Thanks alot Sir..... You are my mentor.... Please share the schematics

[@leaveme3559]

What was that liquid at 9.50 why did u add it?

[@BenState]

flux, for adhesion, cleaning and soldering.

[@markwanklyn4195]

at least you can change the keyboard - hate the newer machines where the keyboard is part of the upper case and is held in by melting plastic pegs - got an two Acer machines here that I need to find the case/keyboard for rather than just having to replace a cheap keyboard

[@fernandopinera3339]

thank you mi friend

[@Adamant_85]

Thanks @Adamant IT for the nice video. Would you be able to share technical specs you used to repair this one like air temperature, fuse model and amperage, soldering flux/paste specs, etc?

[@ess2k456]

What's the music playing from 2.10 please?

[@Adamant_IT]

Thomas Hood - Piano Intro I think it's Piano Intro, not in front of my editing PC atm. It's from the _All Because Of You_ EP, but Thomas' old stuff is very difficult to find and link to now. I obtained permission to use it a long while back. The EP is on his old Sound Cloud here: soundcloud.com/thomashoodoldaccount/sets/allbecauseofyouep But annoyingly the piano intro track is missing.

[@talha21333]

This, model of thinkpad is really easy to work on

[@kztech1319]

On a thinkpad you MUST disconnect the battery to do this. This is because thinkpads are known to have overly protective fuses that are guaranteed to wreck havoc to you when you even remove a keyboard when the laptop isn't fully shut off

[@1007Guess]

thank you

[@GmiddleZ_07]

Sir help problem No Audio Speaker

[@akimhamlet5092]

16:20 Ditto on the assembly of those Thinkpads Had to dissaemble a T400 to change the housing. There's like a million parts lol

[@bunnyr31]

i just fixed one of these with no backlight. haven't watched the whole video yet but mine was a loose connector on the board.

[@MrTarmonbarry]

You have just fixed one of these . Can you answer a question for me . Does it show two batteries on the taskbar ?? O.k , found it , you have to go to the taskbar and expand it then it shows both as battery 1 and battery 2 . Few people have had issues with it just showing one after a windows 10 update , maybe thats why the previous repair person thought it was dead

[@bunnyr31]

@@MrTarmonbarry just saw this comment sorry. i also had to figure out the dual battery thing.

[@pulidonetreparaciones7181]

Gracias por compartir

[@MrBook123456]

good video

[@elriclevantine753]

i actually fixed one as well it was hell to disassemble and reassemble

[@Mikie1959]

I wish you lived closer i have a Sony Vaio that is doing the same thing.

[@johncunningham5435]

ThinkPad laptop's were one of the most challenging to work on; "down the road Lenovo bought out the ThinkPad brand, and of course quality dropped".

[@danielodonnell8998]

excellent

[@donald1056]

You need to buy some electric tweezers for that kind of work - no hot air needed - suggestion only

[@Adamant_IT]

Yea I really want Miniware or Pine64 or someone like that to make some nice affordable ones. I don't fancy the cost of some decent ones that I'll hardly use, and the last time I tried buying cheap ones they were just terrible.

[@rekarlopunzalan]

Old thinkpad keyboards were like, slide them up and you're done

[@chrismurphy8383]

Curious - how much do you charge for a job like this

[@leaveme3559]

Same

[@dennisadams819]

Greetings From Phelps Ky

[@Armadurapersonal]

Looks like a T450, had one that came with a god-awful TN screen, swapped a IPS panel in. Works fine but in Windows there's no Backlight control, only in Linux for some reason.

[@BenState]

T450s came with IPS touch.

[@Martin-ot7xj]

Please upload more like this video . thnx

[@santiagogonzalez6338]

I want a Thinkpad so bad.

[@ahad7954]

Your beard is so nice

[@michh2836]

Lenovo 💪👍😍👍💪😍🤗💥🔥🔥🔥🔥

[@Vonklieve]

Looks like my work laptop. Also has twin batteries. Same brand and make.

[@GregMurch]

Great video, I must drop my Asus laptop over with the same issue.

[@nixielee]

Great laptop to use though

[@JoshuaG]

Good thing my old Acer E5-475G isn't that much a pain in the ass to repair 😂

[@josephking6515]

Have you never replaced the keyboard on it?

[@JoshuaG]

@@josephking6515 Not yet , over the 5 years of owning this laptop , the repairs and maintenance i've done is repasting the laptop , cleaning and RAM upgrade. Battery was just busted this year 2021. As for the keyboard , none of the keys so far have been acting weird, i clean under the keys to remove some of the dust accumulated using a very light, dry and used paintbrush.

[@KrissBartlett]

Wow that was good i have one like that but i dont think ill try but thank you

[@kjuirteerdserty9618]

Lenovo laptops have always been relatively difficult to disassemble/assemble, in my opinion.