Lenovo thinkpad t450s - Screen backlight repair, a pretty damn genuine fault

[@PCEYTube]

Forget dodgy its all about getting the job done. Sorin keeps it very real unlike the rest

[@Radek__]

26:42 info for beginners: if you connect two capacitors like on the video (in series), then you double the voltage tolerance (the capacitors must be the same) but you lower the capacity. And if you connect them side by side (in parallel), then you double the capacity but the voltage stays the same if the capacitors are the same - if not, then the voltage drops to the weaker one. Keep in mind that these smd capacitors don't have polarity (+/-), so here the orientation is not important.

[@SerenoOunce]

To have ~the same capacitance w/ necessary V you'd need *4* caps in both parallel and series, cramming in the largest package size you can fit. Or bodging in a ceramic disk type would be another option if no SMD available.

[@basshuntet6128]

is it the same for resistor?

[@Radek__]

@@basshuntet6128 almost the same - the different is that you don't boder about the resistors voltage but about the current tolerance (power dissipation) which that resitors must handle. ... if you connect two resistors 5ohm in series you have 5+5=10ohm. if those two resistors can handle 3wats, then both in series also handle 3wats. If one is 1wat, secnond is 3wats, then if you conetct them in series, the tolerance dorps to the weakest one = 1wat. ... if you connect two resitors 5ohm in pararell then you lower the resistance = it will be 2,5ohm (for more than two resistors you have to use a matematic calculations) and the Power Dissipation (current tolerance) will be greather. If the resistors have the same power disspiation 1wats per each, then you will get 1+1 =2wats.

[@Yreq]

@@basshuntet6128 For resistors rule is just opposite. When in series values are added, in parallel is lowered

[@thankyou7741]

Technician: You have to replace the fuse! That's not a real fuse, and the real fuse does not looks like that! Sorin: No, this is proper calibrated fuse. We will go by the book. This is how the fuse looks like •~•

[@AntiMat.97]

27:46 is perfect answer 😀

[@weerobot]

Sorin Fuses are The Best..

[@xDaRkModEx]

I was dying with that 🤣🤣🤣"proper fuse, you know like the book" 🤣🤣🤣🤣🤣

[@lovejoymakhaza5229]

This is the only repair channel that I go straight to the like button before I even started watching the video.

[@jayarcameron4207]

A copper fuse. Sorin: A genuine comedian. I hope you gauged the fuse properly!

[@walterwhite9094]

When you started to put in that wire instead of a fuse, I was horrified - until you made it into a proper 'S' shape, THEN I knew it was a proper calibrated fuse. can't believe!

[@carlosgarciaoropeza5480]

@Walter White: Even the authors of "classic" technical books (electricity & electronics) would be amazed if they saw this (in the depths of their interior, of course). All the best.

[@No-nickname]

😂

[@KeiLin11]

It's been a while since the proper calibrated fuse come into action.

[@ytdarsch84]

I had an old model of Philips brand USB stick that didn't work (2 Gb). checking under the microscope I noticed that an inductor on the data line had desoldered. I didn't know where to find the same one, so I rimember that "an inductor is a wire" and tried inserting 2 "proper calibrated wires" and it worked. I was very happy and it's all thanks to you. the best teacher in the world

[@filenotfound__3871]

One of the laptops i repaired about a year ago, has a cartrige fuse glued to the case soldered with wires to the motherboard. I was scared to leave it without the fuse but i needed the laptop up as soon as possible. Not sure why I thought that was a better idea than just shorting it with a thin wire but to my knowledge, the laptop is still in use.

[@giovannimarino4464]

beautiful job I loved the 2 capacitors in series !!!

[@venerandarain3]

they just got married 😅

[@shastrichandoo817]

Fantastic, excellent, well done screen repair job...this is one that I will take note of...keep up the great work Sorin

[@davidsenica8175]

Sorin, you should be a magician😊

[@2368rafa]

Hola Sorin, un gran trabajo y genialidad como siempre.

[@Radek__]

20:18 Sorin is going to replace shorted capacitor! LOL 😯 😍 btw: He didn't tell you, but that capacitor is important also, to prevent backlight flickering. If you don't replace it, then the light will pulsate/flicker and your eyes will be tired quickly 😵

[@Oak690]

Awesome job Sorin! Love your videos, I could watch them all day long. Thanks for sharing your knowledge!

[@Dr.muthanna]

excellent job Sorin , i always lough when you said a proper calibrated fuse

[@renbek100]

Magnifique, beau travail 🙂

[@pantvas6970]

save lot of money of this customer good job sorin i like you work

[@بينالسطور-ض3ي]

Among the best electronic repair channels good explanation good images

[@thomasunsworth425]

You can buy a selection box of new different value and voltage caps so you will always have some brand new ones when needed. I know from experience it is not easy to keep a stock of everything you may possibly need in the future but it is easy to keep the most common ones. Having the correct value replacement fuses is also very handy 73s Sorin

[@markmorris6246]

Job well done Master Sorin

[@PCEYTube]

"Ah you cant see, sorry" -Sorin 😆

[@pajdko8382]

100% the job is done Mr Sorin

[@LaptopDisassembly]

Before i throw away a broken display i remove the board and keep it for spares. There are fuses, caps and etc. I have abound 50 board ( edp, LED, CCFL )

[@jonydarksy2600]

No,no, nothing dogie here, this is a real poetry! :) :)

[@chinaphonefixteam6300]

I really like this kind of maintenance video, full of maintenance knowledge, please continue to pay attention! !

[@dolfink2799]

Excellent work. Congratulations sorin

[@christospashalis6684]

The best teacher❤❤❤

[@bozgaandrei3661]

Salutare, felicitări pt rezolvare!! Foarte tare

[@DADEMANA]

lov ur smile sorin, wish i can meet u

[@icommandoi145]

Saving a screen from the e-waste is always a +, not to mention saving money for the customer and we also learn by watching your video. By the way, can a capacitor be OK with 30 Ohms resistance normally?

[@StefanSolomonsz]

Good Morning Sorin, Thanks for uploading new videos in row that helps a lot to improve our knowledge...

[@MrVenom128]

Hi "hot glueMan" you can save just de board of the faulty screens, they are small and you can have meny of them, i learn a lot of your work thanks man YOU ROCK!

[@Z_Unlocks]

Youre a Master Sorin!! well done

[@alangordon6461]

Patter is brilliant

[@GregM]

That must of been a slow blo calibrated fuse you used ;). No solder bridge between the 2 ends of the caps to ensure no separation occurs.

[@davidarias4127]

Amazing¡¡¡ Sorin , I love electronics when I see you doing things like that¡¡¡ Thank you to share wity us these videos¡¡¡

[@ootyguy9805]

The display became brighter after two caps 😆, great video as usual. Proper calibrated fuse, but hot glue was missing!

[@eliasbourozrrrs8585]

Congratulations, you are the best.

[@tonyrgnash]

morning Sorin, it's been a while since i had to do a repair on a Lenovo, love them thinkpads, much better to work on than Apple boards

[@tvelektron]

I had shorted ceramic caps at screens too. Even on non portable models this can happan

[@lovejoymakhaza5229]

there's one thing i've understand that sometimes if you wanna diagnose some faults and try to use exact information from the book (Theory) you'll not do the job coz at the end if you can't find the exact part you leave the laptop unfixed, or ending up charging customers more for the thing that could have been fixed. sometime To people like me when it comes to theory am dumb and a slow leaner but when it comes to practical I easily catch up. However, theory its needed 100%

[@mm0077]

Well done will work for a long time. Motorcycle 🏍️ in my view is very nice to have in summer but safety is always an issue especially in winter.

[@miroslavstevic2036]

9:07 "Sorrin = Dodgin" moment ... And now it's time for proper calibrated fuse ... 24:45 "And 30 with 30 is 60". Maybe with ideal caps from the book. In reality they won't be symmetrical. One can end up with 35V on one and 25V on the other. Also there is a total capacity reduction. Too dodgy this time, too dodgy ...

[@electronicsrepairschool]

Hahaaa... don't hate me because i'm beautiful :)))))))))))) it worked, right? :D

[@miroslavstevic2036]

@@electronicsrepairschool Being Dodgy is like having "private parts". We all have them but we hide hahahaha. TBH, Maybe you should've measured voltage distribution across caps just to keep loudmouth schmucks like me silent. I really appreciated when you measured temperature of the mismatched MOSFET few days ago.

[@ljubopobric5385]

yes, in series capacitor voltage is double but capaticance is 1/2 , bit it is ok for that job

[@basshuntet6128]

Sorin please make a beginner lesson for lcd screen. Really cool to learn it

[@ChrisPavlides]

you are a "facking" genius Sorin! I really love the way you are going into any repair you're doing. In this specific job, i really laugh alot, yea, and not in a bad way. Job well done.

[@jimmius2]

Hi, you can make a tiny soldering iron from this capacitor. Is a special capacitor don't throw it away......:)))

[@Yreq]

I couldn't resist to watch this video when I saw 'dodgy repair' on the thumbnail :D

[@eldjoesther643]

Ouer teacher Sorin. Your are the best 🎉🎉

[@crumplezone1]

" This is a nice Laptop" :) I need it on a T-Shirt :)

[@yoyomismo2052]

I always keep the boards from the screens, TV or monitor. They can be cut in two (because they are long) and kept in one box, the rest will be recycled.

[@KellySimonsson]

So the fuse can blow if you don't disable the battery or remove them before disconnecting the display cable. This is a common issue when you insert the cable slightly angled and it shorts it

[@waynesallee-com]

That's probably what happened, since the laptop owner recently replaced the screen.

[@mikanikolic1976]

I thought he had no way out, he had to replace it with the same one...however, he always comes up with something! 😂

[@davidanderson2436]

Well done!

[@kimatong1166]

if you series a capacitor, you need to paralled a resistor on each capacitors in the series . This is to ensure the voltage drop across capacitors are the same.

[@italianofx]

NEVER CALL the Proper calibrated fuse + Proper serialed capacitors DODGY EVER !

[@Kalma-cn]

hahahhah we need moree

[@frankmormando3917]

Very well done!

[@tomaszski9818]

Respect, good job!

[@nikoskosmas51]

You just applying electronics!😊

[@patzik1910]

Proper nice repair!!!!

[@emmanuelacquah4059]

Thanks a lot

[@mcgama88]

With a similar screen issue, I used the method as a desktop screen plugged in both as test to operation and where to troubleshoot fault. And I had time so ordered entire new screen (with the small board). I fully understand the capacitor as repair to series to gain the needed pathway as above peak demand. But I did not truly understand the fail as caused the fault. Was it a small water damage? Let me be clear. I only repair as to a hobby, as to repair anything to my bench with no care for service as fast to customer. Here as I am constant to curious as "Why it failed, what part...and in general ...how to test". My intention is to return to working order, and where a key is any unit can fail at any time for a list of reasons. And this unit also, with 2 each battery? I am fine with such fuse as clearly, it was failed before. But was that fuse fail as water damage. At this repair, I simply had a hard time to understand (cause of fail). But, I so like learning and observing. I hope at near future post you will mention the single board panda. Small footprint, mounting plate as heat sink and various config input -output ports. Why? Because I thought it might good to test power needs and how to cause a screen (monitor) connection. Thank you for all your instruction where I learn and enjoy. From Washington State. US M.

[@bogdanbenett1229]

Work of art!

[@ДеянГ]

Great idea. Job done.

[@mshone1972]

matter of "properly calibrated fuse" :) Great as always...

[@michalkastelik7810]

Hi Sorin, what about the capacity of the cpacitors? Doesn't it matter?

[@peteabc1]

It's the output filtration cap, so "the bigger the better." If it works, the value was right, lol.

[@PaulHigginbothamSr]

So I thought ya'll might tie the two caps together in the middle. Sorin must have seen them connected where we couldn't through the camera.

[@RahulKumar-sq3sc]

Good job 👌 nice work experience

[@glenfiddich7635]

Hey do as i do... Whenever i replace a broken screen, i keep only the board. Dont know, must be a habbit left from the CCFL era!

[@greatdrd]

Fantastic job 🎉

[@jaym5938]

Proper calibrated fuse: are there 'different wire types' for capacities, or you use the same wire for all fuse jobs? Thanks

[@ravindraadapa2952]

Really it's good i like your utmost skills thanks for sharing

[@westsenkovec]

The laptop is nicer because it's a Thinkpad series. You know, former IBM ThinkPads. They were always higher quality and even now with Lenovo they are nicer, better built and more durable.

[@carlosgarciaoropeza5480]

@ West Senkovec: Yes West. Totally agree: "Lenovo's route (trajectory) as a company was well planned. Leaving politics aside, he moved his headquarters to Hong Kong (first right decision) and bought IBM (second reason for his success)… we are living what followed, if them does not cross the limits, that is, without making the mistake of Huawei"… Another way of saying it, "it has everything to compete in the big leagues and both the apple giant and the two Korean colossi know it" (excerpt from an article in an American business magazine). PS: I liked the Lenovo Thinkpad even though only one has arrived for service but I filmed the entire disassembly with a portable camcorder and made a lot of notes in my blog. I am more familiar with other manufacturers. All the best.

[@radminas2739]

I still using IBM Thinkpad R50e from 2005.

[@jozsiolah1435]

When a backlight is too low, usually 386 and 486, you can find a component to make it stronger, that is the fuse. In new laptops, when you buy a new battery, the backlight will become stronger. For older batteries, if you refresh it in bios, the backlight will switch to maximum. It is dangerous to refresh old batteries in bios, it may not charge again. The best way, is to start the bios for time limits, instead of full discharging. After a while, old battery may accept full discharge in bios.

[@VISION-viz]

Hi Sorin, the capacitors came back to hunt you for not replacing the easy ones hahahahahaha! Storing screens is a thing now, lol ^.^

[@caglarkelesoglu6955]

Perfect thanks

[@nathvanvolsom5213]

Good job.. as usual 😊

[@mustaphahammad1196]

Amazing video

[@malikg4u]

Just extra ordinary Today's electronic Albert Einstein

[@Popeyes66]

In the next video Sorin shows us how to repair a ribbon cable using Stringy Liquorice .

[@Mecano.r]

Sorin in this video: here we cannot be dodgy but i will do my best to be 😂😂😂

[@ultimateworkshop2000]

I always keep the boards not the broken screens and label them from which model

[@radio-ged4626]

You're a proper wind up merchant with the fuses and capacitor, but I'm not going to bite, this time. The worst that can happen in this case is another component inline with the fuse will burn up, but no major risk as it should be current limited. LOL. 😀 Great fix, I like it when no components have to be bought.

[@nischalkumar6671]

We can use poly cap some of thm have 40 v to 50v

[@mnemonicrulez]

Proper calibrated fuse

[@mammam6472]

.....very ...dodgy....2 capacitors in series and a proper calibrated fuse....🤣🤣🤣...great vid....

[@metalacos]

Sorin please give us a link of universal laptop cable and adapters for power supply. Thanks.

[@ciprianpeica85]

in "Extreme Cases" when the dispaly cable is shorted 😂😂

[@аватар-д2т]

Сорин, ваши видео очень веселые (для тех кто в теме) и познавательные! Спасибо за вашу искренность в видео, это весело

[@HugforYou]

23:09 As a layman, I would have said Sorin make a "proper calibrated capacitor", but nooo, its a wrong idea. 😌😀

[@saeidhashemi7090]

hello sorin. why you don't replace the mosfets with this fuse any more?

[@michaelgay562]

great video.

[@asgharmoradi7309]

very good thank you

[@walter....]

Eu aș fi măsurat cele două condensatoare ca să fiu sigur că au aceeași capacitate și același curent de scurgere, altfel tensiunea se va distribui inegal între cele două condensatoare și e posibil ca unul din ele să fie suprasolicitat și să intre în scurtcircuit, după care toată tensiunea o să cadă pe celălalt și se arde și ăla.

[@ant_Z]

nice job

[@ryanjordan2835]

Hi Sorin, in this video, how did you display the voltage from the charger itself? Is there laptop charger leads that you can get for a dc power supply?

[@sattila4283]

Hello! At what temperature does your air-blower solder work?

[@WeFixTvs]

Sorin please be carefull with this proper fuses, in case of fire insurance company or police will do investigation and then they can blame you for damadges, I know its not matter this fuse but they want find any reason to charge somone for damdes or even worst, its 1 minut job to get used fuse from faulty board.

[@waynesallee-com]

And when you make fuses like that, and if there is no amp control to protect the "fuse", then, if the amps are just enough to heat up copper wire just below the melting point, it can create a lot of heat, that could start a fire. It's better to use thin solder wire that melts at a lower temperature than copper. Real fuses are made of metal that melts at a lower temperature.

[@caprairinucai]

Thank you :)