Laptop Motherboards Repairs - The power input circuit

[@essambakhashwein]

Best teacher ever, May God bless you for giving us your precious times

[@karuppanllc9675]

"THIS IS NOT A LESSON,"THIS IS LIFE." : ( OUR LIFE) .THE VIDEO YOU GIVES US TO LIKE " WATER PLUNGED ON A DESERT".EVERY SECOND THIRST FOR KNOWLEDGE ,VAINS RUNNING ON ELECTRONICS. GOD BLESS YOU THE GREAT MAN ( YOUR NAME CHANGED ME AS GREAT MAN) please do basic laptop repairing videos and so me like millions of new commers can learn and understand the things.so that they can change the world into a better place .

[@ЗлаткоЗлатев-э5к]

Hi Sorin! Don't underestimate the theory. It is very useful to us. To the people who have not studied electrical engineering we are very helpful. Please continue with the theory too. For example, I did not know that at full short the power supply will show 0 volts and at partial short will show 2 - 3 volts. The theory and schemes you draw are very useful to me. Greetings from Bulgaria.

[@jeepee7091]

Златко Златев can’t agree more

[@jonclement]

Just be sure to limit your power supply to 2 amps otherwise you'd melt the partial short

[@tinkmarshino]

another outstanding video Sorin! you give us insight to your troubleshooting methods and a good understanding of what we see when we take time to look.. I thank you for all of the time you take for us not only on these you tube videos but on discord also plus the various other platform you are on.. You will live on long after you are gone because all of the kids here will carry your shared knowledge down the years.. and who know who they will pass it to... as spock used to say "live long and prosper" Sorin!

[@czjsemnoobcz]

This is probably best channel by far. Best explanation and what's really important is that it is USEFUL and HELPFUL. Thank you for your videos. :) have a nice day :) :)

[@mugurelrosca9774]

Mulțumesc pentru tot ce faci în aceste vloguri. Am învățat multe și te urmăresc cu plăcere. Mă înclin altruismului tău!

[@Mohamed-jn4yr]

i love how u put up things .. greatings from Tunisia 🇹🇳

[@MouSotto]

No need to explain yourself about your tactics, you've proved yourself again and again!!

[@markpenn4831]

Surely the skill is in diagnosing the fault, rectifying it and understanding what caused the fault in the first place ! Anyone can swap a part like for like. Professionalism is understanding to the minutest detail 'cause and effect.' Absolutely fascinating Sir !!!

[@knightwar3]

Terrific diagnostic you made it look so simple with the drawing

[@LVTMVP]

Amazing. I have decided to watch your very first video till now. I'm glad that i have learnt alot of things, many that an engineering school could not teach. My desktop unfortunately decided to die on me during this period where repair shops aren't open and I cant wait to test what i've learned from you and apply it on my desktop. Cheers Sorin ;)

[@kenken5599]

thank you so much Mr.sorin for the great lessons

[@ohmware2020]

nice video sir.. i learnt a lot today... were still waiting for desktop motherboard repair... the step by step just like u did on laptop mobo... more power! greeting you great day from philippines!

[@BAMB00STE]

Probably would never have understood these things, if it wasn't for your great videos. Thanks very many

[@diemiesepetra]

I really do love this guy, he is teaching life! Everything can be easy when you know how it works 😊 Please keep on going !

[@ricardoacostatorres1350]

Initial my school laptop costed 700€: i7, 16GB Ram, 940 graphic card 2GB, 500GB HDD 128GB SSD. The hinge broke down and my screen acted funny. I started to diagnose and figured out putting pressure on my screen/ screen chip at the bottom made it go away. but came back after a while. So I first repaired the hinge with 3 small bolts. And then changed the screen for 100€. I also changed my HDD with 500GB SSD Samsung EVO. Glad to do it because a new computer would cost me 1000€+ for a decent one. In total I wasted 200€ so 700+200 = 900€. Build up experience and also always had my laptop available for school. Mostly this is because of people like you sir. Made me realize nothing to be afraid of and just analyse and repair carefully.

[@giorgostexnikos6976]

thenks for the theory professor.amazing video.

[@PcParamedics868]

Hey good day man I must say thank you to you.... I learned soo much from videos. Easy to understand.

[@ravindraadapa2952]

sir i very impressed about your skills and knowledge experience what ever really its awesome to learn from you sir till know i watched your all videos each one has different and unique and i had good learning improvement the way to handle and diagnose the faults unfortunately i in India if there i will carry my journey with you sir any way thanking you very much for good skills like this

[@VincentTubed]

Thank you very much for your detailed explanation, it's very much appreciated!

[@jay22alco]

Best electronics and life teacher. Thanks for teaching me allot of things sir! To those who really want to learn repair, learn electronics first, then learn to repair and improve through experience.

[@kgiorgosGR]

I make a playlist because of this video....Best of...videos.you are grand ....you are titan... you are godlike level .respect.one more time.... thank you Sorin

[@Energy74T]

Thank'you for sharing your experience. Learn the technique to find the faults is really very difficult. Your lessons are the most interesting TV series of the moment.

[@jonaspersson1975]

Thank u for good videos Sorin! They help me to learn alot!! Its nice of you to give us all help to learn. 👍

[@cherifboy6479]

You are always the best.... Thanks fot teaching us for free

[@Kreska0]

Hi Sorin, I'm going through rough time and I had to stop my patreon support. I just want to thank you again for all the knowledge you shared and once I will be back on my feet I renew the patreon pledge.

[@ganesansurya]

You are great Teacher. Mr.S

[@mohammadzare9927]

hey sorin, i love you, 😉 i love your english accent and words you choose 😂 and you are very professional man.

[@danbeuscher9679]

I got me one of the screw drivers like you are using. It has been very good for the tendon in my thumb.

[@docfoot316]

Very clever fellow this professor ,well done Sorin ,admire ur knowledge ,Cheers

[@nicolawills7571]

Great video lessons and a HUGE THANK YOU i am only learning .

[@J1media_24]

Hi from Tz .Thank u sorin be blessed a million times

[@husseinSingano]

I,m also from Tz

[@J1media_24]

@@husseinSingano singano 👍👍👍

[@raymie5612]

Thanks for all your vidéos Sorin!

[@Oak690]

As always - thank you for sharing your troubleshooting methods!

[@loayabbas2454]

Thousands Thanks Sorin. You are a great teacher 👍🏻😉

[@muhammadsameer883]

excellent brother. keep up the good work

[@nkhjk3457]

referring to the things you pointed out at the start of the video, i used to fix computers from a very young age , not really know what i was doing theoretically , but i knew that if i did "thins thing" on "the other thing" things would work again (i read and watched many sources online and videos like yours XD) , but my customers and ALL customers in my country ... think that are always right , demand of warranty like 100+ years , and sometimes they even tell you how to fix the things when they have no idea about them, i remember that once i literally explained to someone for half an hour about his iPod that had a cracked screen and how i could not find an original screen for it because the model was way to old for the local part suppliers to have Original parts in stock and the customer just said to me "well since you cant find original parts for it then you are not a good repair guy!" .. and what do you expect from a guy fixing things at home .... of course they went to the trusted apple reseller and they got a straight big NO , and when returned they got a big NO from me also ... then shortly after i quit self learning electronics and changed my career plans , now it looks like i am starting to like it again thanks to this channel , maybe i will start self teaching again soon as a hobby , and i hope that the people changed and can understand better now :)

[@bernardvermeulen8031]

Haha, two hand writing love to see you switching hands Evert time you draw something.

[@wisher21uk]

Bernard Vermeulen not many people are ambidextrous

[@bernardvermeulen8031]

@@wisher21uk that is a fact, Leonardo Da Vinci was one of them, Mayby Sorin is related🎨

[@malikkhan_01]

man your the best keep on teaching us and may Allah bless you

[@sprinter768]

Good lesson, Mr. Sorin. Thanks.

[@robertisaacs5122]

Thanks for the picture of the circuit. I wish you would have talked about how the coil works within a power rail.

[@MrRvdbeek]

Nice job nice explanation It works with blowup parts thank you

[@zx8401ztv]

Sorin i always enjoy your repairs, that shop is lucky to have you :-D. Replace the mosfet... ha ha that's a good one :-D

[@electronicsrepairschool]

admit it, that burned mosfet still working as a wire, looks better on the board compared with a boring wire :))

[@zx8401ztv]

@@electronicsrepairschool LOL :-D

[@abuubakarosmanaweys9106]

Thanks for the lesson

[@electronic7979]

Nice repair video 👍

[@hadireg]

so nice sharing!!! thanks Sorin!!

[@alcapony2012]

more videos like that with detales. nice, thank you

[@aggravate83]

Hey Sorin, you can start a patreon goal for the thermal cam! We may save your fingers from burning :) thx for the great content!

[@electronicsrepairschool]

idk, i kinda like it :P The skin burn is the price i have to pay for finding the fault :))

[@aggravate83]

@@electronicsrepairschool job first, burn later...

[@azetech2232]

thank you very much all yr lesson is helpful . fan from morocco

[@auguststas7770]

Will power supply check work on HP. As far as I remember it has to have 2 different voltages: one for identification and one for power ?

[@blackdotkiller1]

Mr give me one second another helpful video thank you

[@xkhokokox]

I don't really get his explanation at 13:10 about why it is ok to remove the mosfet and short it. Can someone explain this?

[@kriswillems5661]

Somehow I don't believe you'll replace the blown up mosfet :)

[@wassikt]

I think it got replaced by a proper calibrated fuse 😁

[@xkhokokox]

How was he able to measure the amps between power supply pin and ground at 9:30? Can you do this with a voltmeter too somehow?

[@sh0352]

What an exciting channel...

[@uchesoncomputerconcept2856]

Thanks so much, pls can I get a detail video on good usb port but not working for any laptop

[@dalecostich8794]

stupendous teaching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@rizwanshaa]

wonderful teacher. i love you sir.

[@Electricworld-1]

Thank you very much, a big thumbs up

[@sayedtadoun2169]

more videos like that with detales nice you are a good manthank you ( from Tunisia )

[@Abdallah.795]

God bless u your ownest in everything....... ❤️ A heart from my heart.

[@greenishaq]

Thank u sir. from Sri Lanka....

[@LatvianMinecrafter]

Did you ever replace the mosfet or add a new capacitor? If not, is it safe for the other components to not put new ones on or not?

[@pedrobernedo1811]

33:50 I thought the same, you should buy a thermal camera. Good video!

[@mmbbsqw1d]

Nah, he could maybe pour some alcohol on and see it evaporate (it will evaporate quicker on hotter components)

[@f1lab535]

Did the chipset for cristian's laptop arrived yet?

[@electronicsrepairschool]

adel saidi not yet

[@Shanus00747]

I am also waiting for this, Mr.Sorin

[@paolomonai9511]

I, too....very curious to see how a chipset can be replaced without the proper special soldering tools.

[@lvwilb5687]

HI SORIN GREAT JOB.WHY DONT YOU USE THE NEW PORTABLE POWER SUPPLY THAT YOU HAVE TO DO DEMOS WITH,I HAVE ONE LIKE THAT, AND ON YOUR NEXT VIDEO WILL YOU USE IT, I GET CONFUSED ON THE AMP SETTING WHEN YOU INJECT AMPAGE INTO THE MOTHERBOARD,

[@K1ZEK]

Very interesting and very good talk/video.

[@daanvanniekerk7146]

Why don’t. You have to use a lower testvoltage on the second mosfet to detect that there is an short? If a switching mosfet from power supply (from for example the cpu) is also blown and permantly giving power than the cpu receives this 19v voltage also. Or am I wrong some where in this case? can anyone explain

[@markverklas6603]

Thanks for sharing amazing skill Keeping the process of repair simple and straight forward Knowing what can’t work and Finding what will Really appreciate you giving your time to teach Maybe you could tell me if that electric screwdriver is worth getting Or not?? If it is , would you post the brand Regards Mark

[@MF-jo6jt]

A little bit off electronics a little bit of experience and a LOT OFF DODGY 🤣🤣🤣

[@dimitarnikolov3527]

If it's not dodgy the job is not done properly 😂

[@dimitarnikolov3527]

@Skill Hunter dodgy is to use a piece of shoe rubber to press against an ic

[@Mustafay3sil]

M F hahahaha 👍🏻👍🏻

[@MindYourBusiness1970]

When you get confident you make mistakes ,it's not a fault ,it's normale everybody should learn this mechanism,I fly over when I see this kind of mistakes

[@MRDEEPAKVASWANI]

My highest respects goes to you,I love you my teacher,your videos are inspiring ,and have teach me a lot.I have a question this smd capacitor have no value written on it how do you know what value capacitor to use.Thank you beforehand.

[@frankfernandez1569]

best teacher ...

[@abinpkalarickal1743]

Unlike these motherboards which has the charger connector n initial circuit integrated. what to do if the circuit is separate removable...n whenever i connect the charger the light on the charger trips off... its a sony vaio laptop...

[@mmbbsqw1d]

I have no power or led and first two MOSFETs (are scorched) and they are shorted on Gate-Drain. This must be my issue right?

[@AdamSNook.]

instead of removing the mosfet and putting a wire couldent you use a Diode to stop the volts from going back into the dc soket and down the charger

[@AdamSNook.]

i have a asus laptop that as had the mosfet removed and when i unplug the charger from the mains the charger light stays on lol as its sending current down the dc socket back to the charger

[@cosmincararusa8044]

Hello Sorin ! I have an issue with an faulty display on my Lenovo Y50-70 laptop. Long story short: Everything was ok, laptop fell around 20 cm height on a bed: Black screen of death! Everything else works perfect, including camera on display. I have illuminated the screen with a bright light and the image is theren but very very dim. What could be? Is it posiible to be a cable problem, or something more complex? Multumesc frumos! Very nice channel an very nice information here!

[@danteaguila6772]

how much degree are you using when you are removing the component ?

[@massimilianobarresi.]

Sorry Sorin i've asked in the last video how do you recognize N-Channel or P-Channel.. but on minute 11:27 you explain it.. "based on the configuration on 1 side we have 4 pins togheter and in the other side we have 3 togheter and 1 gate.." ok and in this case we have N-Channel mosfet? If i don't have the schematics i don't recognize it.. but you in very simple method recognize it! I do not know how :D

[@Mgcomputermarcianise]

Well always well when Explain you make everything easier 😃 but it is only when I work on my MB I always find it difficult .... bah I'm trying to learn for the moment! ok Mr. Sorin, I have 1 question if there are 7v on the second mosfet and not 19v what was the problem?

[@arnoant1438]

I study electronics in high school but I don't learn much, hehehehe. If I had internet before... now is much easier to learn.

[@ЗлаткоЗлатев-э5к]

I would also like you to explain to me what a coil (inductor) is. How it works. Whether it increases the voltage or can only reduce it. I'm aware of a tansformer but not of pulse power supplies . Can you bring a little clarity on this to us beginners. Thanks! Sorry for my English (Google Translate) (I watched your videos for beginners. there you explain how two mosfets close and open with 300,000 hertz and from there the coil makes a high voltage, but unfortunately I can't understand it)

[@WeFixTvs]

Louis Rossmann explain it very well,

[@ЗлаткоЗлатев-э5к]

@@WeFixTvs Link please! Thank you

[@poziomy5273]

I like this channel very much. But i have VERY important (to me at least) question. Why there is no desktop board repairs?? Its not about your channel, but others as well. Are desktop boards not impossible to repair? Too difficult? Too expensive? Why no one seem to repair desktop boards???? Can you explain please?

[@ralph-ralphdeguzman6091]

thank you

[@masterpo7594]

Hi, does some components on laptop motherboard should be not soldered properly? I gave my laptop to a repair shop but they said they could not fix it. Then I take a look a it then I see components where it's only soldered on one side. I hope someone can help me.

[@AnonymousRepair]

Please show us that it chargers with the faulty mosfet, The same ic that controls the first two mosfets, controls the charging of the battery and talks to the battery and EC ( super IO chip)

[@electronicsrepairschool]

i still can't see the connection, i had 19v before the mosfets, 19v after.... have absolutely nothing to do with the charging

[@AnonymousRepair]

@@electronicsrepairschool The same ic is used for both, some of the charging ic will not charge the battery if those mosfets are faulty, kzbin.info/www/bejne/rZPOZ5qKo5eoi8k

[@electronicsrepairschool]

I understand, but my issue is not the charging circuit, my problem was a shorted cap and a shorted mosfet

[@AnonymousRepair]

@@electronicsrepairschool That was my problem too, The first mosfet was briged and would stop charging after while and run down the battery , unplug the charger and replug it would let n charge for n few minutes then stop again that was with the first mosfet shorted, I removed the short over the mosfet and the laptop would not switch on

[@electronicsrepairschool]

thats because your management chip was dead!!!! Not because you short the mosfet, those mosfets are doing nothing else than driving the 19v to the rest of the power supply's.

[@lachobakamba2835]

on a dell laptop the second mosfet heats up to the point of smoking but when i take out the current resistor it stops. what could be the problem?

[@Fourty_7]

Hi Sorin happy to see you again , i have a question about the graphic chip : can we do the reballing of the chip manually ? Is it possible ?

[@danielbayugar4856]

Thank you Sir!!

[@kevincelendu9282]

mau tanja kalau garis putih disampaing mosfet apa gunanja terimakasih

[@carlopasswords7083]

Thanks!

[@brythkusiappiah6071]

nice job

[@VijayKumar-sk9dn]

My PP39L Dell Laptop is when connected charger after few minutes getting shutdown reason please

[@Adel-Taha]

what screw driver you use ?

[@gastonb1318]

And with the comment We are not doing electronics We are doing repairs you can finally stop explaining when you do a dodgy job. Wisdom genius. Put that in the channel page so ppl understand clap clap clap clap 👏👏👏👏👏👏👏

[@pendidik_sepanjang_hayat]

thanks master..useful for me

[@jalal76]

great job thanks

[@riprod6379]

Hi I wish if u can help me.. I have a dead laptop need a bios update to work.. Nd I couldn't find the perfect bios program to work it.. all the bioses turn it on but it won't work good.. it's a HP laptop

[@st-qx4gr]

Hello ...when i turn on my laptop power light led turn on and off immediately and my laptop can't start . plss answer

[@wahyupamungkas5331]

Brother, I want to ask something, what's name screwdriver machine that you use?? Thanks..