Lenovo T430 - Let's learn about the backlight circuit

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  • Опубліковано 13 вер 2024

КОМЕНТАРІ • 138

  • @gassanali8667
    @gassanali8667 4 роки тому +20

    the master of laptop repair

  • @arthurhazar3150
    @arthurhazar3150 4 роки тому +14

    A man who shares knowledge is a respact worthy man... Thanks Sir
    Big fan Syria

  • @DanielsGameVault
    @DanielsGameVault 4 роки тому +28

    8:57 that test point actually reads PWM, not PWR, so that is most likely your "DIM" signal, since it stands for pulse width modulation :)

  • @metalacos
    @metalacos 4 роки тому +1

    Sorin you don't have to justify yourself to anybody. There are no people on youtube with your style of fixing things and willing to share true skill. This is whole new level of fixing things. And all of us who are watching your videos have choice to repair things on our way or your way. So don't waste your precious time explain anything except how to fix something on your way. Thank you very much for your videos.

  • @AmerRimireZ
    @AmerRimireZ 4 роки тому +9

    Thank you for sharing your experience

  • @joaoc_PT
    @joaoc_PT 4 роки тому +5

    Sorin, your overengineered repair audio jack port will outlive the rest of the laptop.
    True, you spent a few more minutes than just switching for the proper part, but it is also more cost effective than ordering the part, waiting, charging the part, etc...
    Always Kudos to Macgyver solutions :)

  • @bononokiller2708
    @bononokiller2708 2 місяці тому

    I DID EVERYTHING YOU DID AND IT WORKS THANKS A LOT YOU ARE THE BEST

  • @spimfurt
    @spimfurt 4 роки тому +1

    Thank you sir. I watching you about a year. Last 2 weeks i had 3 nice scores: pixel 2 xl - the undercharged battery, Samsung Note 10.1 - slightly pulled screen ribbon cable and Dell XPS 1330 - classic shorted cap, found by your method. multimeter and low voltage + 1 amp current to power rail, splashed by zippo fuel. It was fun. You making a people happy. Hello from Czech Rep.

    • @meetblue1
      @meetblue1 4 роки тому

      Great. You made a good work. I can also get your information for my skill up.

  • @HikaruGCT
    @HikaruGCT 4 роки тому +4

    I dont know why you call it dodgey. It works and customer can use the laptop. Innovation of repair. Not everyone can afford 10 hour repair fee for super dio trouble shoot. Well done sorin type for the info.

  • @electronic7979
    @electronic7979 4 роки тому +2

    Very good repair video

  • @bernardvermeulen8031
    @bernardvermeulen8031 4 роки тому +4

    Many People who call them pro are in fact just sellers, they mostly says not repairable, cost to high, so Sorin Fix things with out pushing for new buying.

  • @sayou13014
    @sayou13014 4 роки тому +20

    The master never do dodgy jobs... When the master did something, we have to shut up and learn... That's the life, good job Sorin

  • @Tirkan
    @Tirkan 4 роки тому +1

    Let the haters left and you are not dodgy. Good lesson. Keep up

  • @Edw590
    @Edw590 3 роки тому

    You just helped me realize the issue with my laptop LCD backlight! Was the TK fuse (thank you, I didn't know that was a fuse - different fuse). So thank you!!! I don't have to buy a new screen...!!!

  • @MrLocomusica1
    @MrLocomusica1 4 роки тому +2

    Always a pleasure to learn here! Fantastic channel, keep up the great work, Sorin. Too bad that I do have only two thumbs I can raise. :) Enjoy your weekend

  • @nishanthd4272
    @nishanthd4272 4 роки тому

    i am big fan of the electronics repair school

  • @danibustos5491
    @danibustos5491 3 роки тому

    Que video q me salvó mi laptop "MAESTRO" Gracias!!! desde ARGENTINA BUENOS AIRES

  • @dedskin1
    @dedskin1 3 роки тому

    Amazing guy , trust me , i am good in repairs as well i repair everything , but to make it presentable like this it takes effort .

  • @xx3868
    @xx3868 3 роки тому +1

    Haha, you could also add a resistor to that bridge just to lower the screen brightness a tad so its not at full brightness which would help battery endurance. Lots you can do to laptops to get around problems and keep them running longer..

  • @Goda00100
    @Goda00100 Рік тому

    PWM = Pulse Width Modulation. Used to control brightness as you said.

  • @MrRvdbeek
    @MrRvdbeek 4 роки тому

    Sorin,
    Great explanation do more of this
    It helps me to find the fault

  • @simeonmihaylov6123
    @simeonmihaylov6123 4 роки тому +4

    23:23 That laugh was even more dodgy than that connector. xD

  • @ovidiuovidius
    @ovidiuovidius 4 роки тому +1

    Sir, ești mare omule!!!

  • @RespawnRestricted
    @RespawnRestricted 4 роки тому +2

    About time you work on a t430 I've been waiting for this LOL

  • @nishanthd4272
    @nishanthd4272 4 роки тому

    and always waiting for new videos thanks for the all your videos

  • @knightwar3
    @knightwar3 2 роки тому

    So the power button can have 1.8v instead of 3.3v that's good to know thank you and nice save

  • @andyturner1727
    @andyturner1727 4 роки тому +1

    Hi Sorin , Hope you and family,friends and colleagues are keeping safe and well . :- )

  • @MindYourBusiness1970
    @MindYourBusiness1970 4 роки тому

    Nice video ,Sorin under attack strikes back , well done.

    • @MindYourBusiness1970
      @MindYourBusiness1970 4 роки тому +1

      I'm not a hooligan I'm still sitting on the opinion that we are here to learn something ,I don't like solutions like oh my laptop has a shorted cap, let's buy a new One (laptop)

  • @nuhushaibu2388
    @nuhushaibu2388 4 роки тому +1

    do you know so many Laptops have been declare dead because of this issue God sent Sorin just bring out the secret. only God can repay you. love you man from my heart. fixing without schematics all thanks to you

  • @aw0718
    @aw0718 4 роки тому +1

    Well Done again!Thank you!(Bios is frozen because of dead cmos battery)

  • @RTPTechTips
    @RTPTechTips 2 роки тому

    Great video!

  • @bahadoromid3554
    @bahadoromid3554 4 роки тому

    Thanks for sharing .its Fast and Quick Repair

  • @cuyaclint9247
    @cuyaclint9247 4 роки тому

    Sir, thanks a lot for this vid... i follow your principle and it works for me. thank you very much.

  • @kashi658
    @kashi658 Місяць тому

    Very interesting 😊

  • @abdurahmancorovic807
    @abdurahmancorovic807 Рік тому

    Your videos always is usefuly

  • @zenguru84
    @zenguru84 4 роки тому +1

    Sorin for president!

  • @Fourty_7
    @Fourty_7 4 роки тому +1

    Thnx for the video Sorin , i'm so impressed Bravo ! 👍 .. but how you learned all theese things ??

  • @allthingsTechrelated
    @allthingsTechrelated 4 роки тому +3

    If I could do these doggy jobs, I would be glad. Thanks for sharing

  • @rachelferrer1484
    @rachelferrer1484 4 роки тому

    We are the same problem and we are the same sokve the problem just make a bridge or junper to light up the back light sooo thank you for another tips and idea hehe

  • @hafizmohammed1866
    @hafizmohammed1866 3 роки тому

    I love U doji man , U have to do same job one day maybe maybe ................................. salute sir 5 stars ✨

  • @belloumaomar5355
    @belloumaomar5355 4 роки тому +2

    Awesome

  • @vesko356
    @vesko356 4 роки тому +1

    New video - excellent.

  • @interestingspagetti
    @interestingspagetti 4 роки тому +1

    I wouldn't worry about the brightness. It would make a great lamp ;)

  • @apatewnayeah9854
    @apatewnayeah9854 4 роки тому +1

    Sorin, thank you for all the knowledge you share with us. Personally, I would put a layer of capton tape below and above the bridge to protect the wire from touching anything arround it. I would not trust the thin enamel coating on the wire. I've seen some chemicals (UV cured) that help maintaining such bridges intact and electrically safe but never used any of them.
    Also please be less dodgy with the laptop screws and use some magnets for them :)
    Now about the previous video, I did a similar laptop headphone jack repair using an audio extention cord from the motherboard straight out a small hole on the plastic chassi (customer approved the solution). Also tied a loose knot on the extention cord as a mechanical stress relief (not the best solution) and it's still working fine, so yeah be as dodgy as the customer can accept.

  • @hugoboss7600
    @hugoboss7600 4 роки тому +1

    It was inverted : 8:57 is not power is PWM=DIM , and the other pin is ENABLE ,so it was DIM=3v ,ENABLE=0 ,better idea is to bridge EN pin with 5v.In that case everything is working ...Brightness..

  • @Swenser
    @Swenser 4 роки тому +1

    Still curious on this one to know if dim signal comes out of sio. Maybe a broken track or bad connector that could be traced. If sio handles kb signals maybe keyboard is fine too. But I guess you don't have the time. Enjoy a Happy valentine with the love of your life. And I don't mean your iPhone.

  • @tezraym
    @tezraym Рік тому

    I do like your videos always what is going on, this is weird, this shouldn't be happening but then you magically fix it

  • @recommendedforyou157
    @recommendedforyou157 4 роки тому +1

    sir please do made more videos about inverter and backlights repair on laptop for beginners.

  • @michaelwaithaka8575
    @michaelwaithaka8575 4 роки тому

    this dude got to be a genius

  • @kelvinthomas3751
    @kelvinthomas3751 3 роки тому

    Good job bro

  • @weerobot
    @weerobot 4 роки тому +2

    Awesome.. again

  • @davidbates2161
    @davidbates2161 4 роки тому

    without having the schematic I believe the signal passes through the dimmer. Without the keyboard plugged in there would be no way to power it on. I think you'll find it works without the jumper when the new keyboard is installed......

  • @MrDinakdakan
    @MrDinakdakan 4 роки тому +1

    added to favorites

  • @sebulica93
    @sebulica93 4 роки тому +1

    cel mai des am intalnit problema din multi-io,problema de firmware.ai putea sa incerci cu un update de bios,eventual chiar daca ii ultima versiune ii dai sa il faca din nou daca iti permite.am mai rezolvat problema asa la unele laptopuri inclusiv brand-uri mai cunoscute....oricum varianta cu enable direct pe display ii mai rapid

  • @captnemo1465
    @captnemo1465 4 роки тому +1

    Mr. Sorin the "Artful Dodger"

  • @digihorse6730
    @digihorse6730 4 роки тому

    I think the pin Sorin shorted was the EN 'Enable' pin. Would love to know if the brightness controls worked in the end.

  • @TheKetsa
    @TheKetsa 4 роки тому +3

    I blew the back-light fuse on this one while changing the display.

    • @gassanali8667
      @gassanali8667 4 роки тому

      so it's your one

    • @SpeakerFan
      @SpeakerFan 4 роки тому

      For the love of god, disconnect the battery before doing so 😩

  • @thearsabre
    @thearsabre 4 роки тому

    شكرا

  • @shinesonmontifalcon4238
    @shinesonmontifalcon4238 4 роки тому

    Thank you so much.

  • @janitortech3264
    @janitortech3264 4 роки тому +1

    I came across your channel 2 days ago. Everything here is crazy in terms of knowledge. I have a dell ins.3537. And i cannot install my dedicated gpu drivers. Every time i attempt installing them my dedicated gpu (ati) starts to make some boiling high pitched noises and my laptop freezes. I also have integrated gpu (intel) that helps me watch videos and overall turn my screen on so i can use my laptop. And i know this aint the place to ask but Can i assume that my gpu is dead ? Any help would be appreciated. Thank you. New sub.
    Gpu is ati radeon hd8850M.

  • @Radek__
    @Radek__ 4 роки тому

    18:22 super i/o can pull down to the ground that signal, ALSO if the hall sensor switch is bad (as you know - the sensor, which is checking if the lid is open or not)

    • @electronicsrepairschool
      @electronicsrepairschool  4 роки тому

      Hmm, on that case the power button will not work also, but my power button its working

    • @Swenser
      @Swenser 4 роки тому

      Doesn't lid switch stop screen altogether. Data plus bl?edit.. I just tried with magnet on my Toshiba. picture is turned off too, not only BL, if lid hall switch active. Only backlight problem cannot be lid switch problem . on my Toshiba anyway.

    • @Radek__
      @Radek__ 4 роки тому

      @@Swenser no

  • @JuanCarlos-zv6kt
    @JuanCarlos-zv6kt 3 роки тому +1

    Hello i have t430 lenovo. I hate display mate. I can replacent it? 🤔 How?

  • @EurekaRecycler
    @EurekaRecycler 4 роки тому

    So the super io will not develop any problem if that 3.3 is jumped? Thank you

  • @Nutzername36
    @Nutzername36 3 роки тому

    this guy is like the bob ross for laptop repair :)

  • @reacey
    @reacey 4 роки тому

    Maybe it could have been the capacitor which was shorted? , the one you soldered the bridge wire to under the ic

  • @cmos7457
    @cmos7457 4 роки тому

    you are great sir!!!

  • @jhayhammos9339
    @jhayhammos9339 4 роки тому

    it is possible that there is no vedio output on the vga or hdmi if super io problem?

  • @paulrunell7821
    @paulrunell7821 4 роки тому +1

    when are you going to do some work flows

  • @Flavius-Tech
    @Flavius-Tech Рік тому

    Why don't you plug your usb keyboard and check if brightness is at low?

  • @JordaanEben
    @JordaanEben 4 роки тому

    My T430's backlight is not working. On startup you can see the Lenovo logo (faded) and then nothing. I swapped the screen out 3 times and all of them are not displaying. Is it the fuse on the mobo? Is there a solution for this? Any help would be appreciated. =)

  • @1033141
    @1033141 4 роки тому

    thank you sir

  • @glitchd1_
    @glitchd1_ 4 роки тому

    Bravo.

  • @ruudvanvliet5766
    @ruudvanvliet5766 4 роки тому +1

    you the best

  • @kadmaster
    @kadmaster 4 роки тому +1

    Sorin!!! Come to Besiktas a

  • @boolfnasa2582
    @boolfnasa2582 4 роки тому

    Dodgy but beautiful as usual, but wouldn't it has been better if at least you checked for a bad connection in the connector or a blown resistor which is preventIng the DIM SIGNAL TO REACH?

  • @eliasmasanta4526
    @eliasmasanta4526 4 роки тому

    fantastic

  • @ElektroTechNL
    @ElektroTechNL 4 роки тому +1

    I was waiting for fireworks. Fcking screens haha.

  • @therealspixycat
    @therealspixycat 4 роки тому

    Side question: there do you get your is (original) samsung s7 battery?

  • @nishanthd4272
    @nishanthd4272 4 роки тому

    i have a laptop thinkpad t430 backlight problems how to solve i have soldering equipment i think its a fuse blown and i dont know where is fuse location please share if any 1 know

  • @rachelferrer1484
    @rachelferrer1484 4 роки тому

    Hello can you remove parallel lines on lcd? Like single lines blinking then will disappear after 1hour

  • @wthornton7346
    @wthornton7346 4 роки тому

    Maestro.

  • @benzyblenaru9602
    @benzyblenaru9602 4 роки тому

    Connect a wired keyboard to the USb and check

  • @umairmumtaz9792
    @umairmumtaz9792 4 роки тому

    sir you r great

  • @MrFujack103
    @MrFujack103 4 роки тому

    Help me sorin help me!! You have inspired me to buy a iPhone 8 Plus broken. I now got it to work using your videos but I need to know what components on fl3995 and fl3995-1 I think it’s a inductor but I don’t know the spec. Can you or someone help me with some info on this as I can’t find bugger all on the net!

  • @Muscle-Shots
    @Muscle-Shots 4 роки тому

    Can anyone tell me how to make lcd 30 pin cable to copy firmware from lcd to another ... because i can't find anyone have this cable here in Egypt

  • @waleed9128
    @waleed9128 4 роки тому

    ok, you got the laptop fixed but was to the content of the customer? should you check with him first before doing such repair? As a technician, I always check with the customer and when I get his approval on such repair, then I go a head with it. if not, I fixed it the way the customer wants and the price that I ask for. just my humble opinion.

  • @TrivianMusicChannel
    @TrivianMusicChannel 4 роки тому

    Hi sir...if i've been replacing the screen with the new one but the backlight still not show up, what is actually i have to check?

  • @linksrepair8078
    @linksrepair8078 4 роки тому

    professional

  • @sup2069
    @sup2069 4 роки тому

    Does someone have a link to the headphone video Sorin is referring to?

  • @teohchiawei
    @teohchiawei 3 роки тому

    What if the backlight never goes off when laptop is shutdown

  • @bernardvermeulen8031
    @bernardvermeulen8031 4 роки тому

    Are those wires isolated?

  • @qwertyazerty1439
    @qwertyazerty1439 4 роки тому

    Is this a thinkpad with a liquid damaged "spill proof" keyboard?

  • @kdilac8879
    @kdilac8879 3 роки тому

    Sorin or if someone can help please, my laptop screen is 300hz, but now after a year it's start to have a motion blur effect while I'm watching UA-cam videos.
    (scrolling and gaming are still smooth)
    Its not from the drivers, and not from the windows.
    there is a chance that it's happens cuz a bed capacitor on the monitor board?
    Please🙌

  • @bctoner
    @bctoner 4 роки тому

    Without a jumper the cost of repair is greater than the customer would be willing to repair

  • @dannyandrews8930
    @dannyandrews8930 4 роки тому

    I have a £1000 gaming laptop, it has a faulty mother board. Do you have a business that I can send it to for repair? I have been told by hp it needs a replacement motherboard. Please can you help or point me in the right direction. Thank you so much

  • @chameleonnn
    @chameleonnn Рік тому

    wow

  • @pihmusik
    @pihmusik 5 місяців тому

  • @toufikdjemaoui8265
    @toufikdjemaoui8265 4 роки тому

    laptop turn off after 25 munites acer compal_la-7912p_r0.2

  • @KNFIX-CUCHI
    @KNFIX-CUCHI 4 роки тому +1

    like sr, thanks

  • @mikeyan7312
    @mikeyan7312 4 роки тому

    He should test with another screen that would be faster to find out if the problem is the lcd o motherboard