The Most Common Fault On a Laptop When is Not Coming on, Dead Mosfet

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The Most Common Fault On a Laptop When is Not Coming on, Dead Mosfet

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Күн бұрын

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@valejacobo 3 жыл бұрын

3 years later and you helped me diagnose and repair a HP Dv7 I bought for almost nothing due to being "dead". Thank you so much, your videos were extremely helpful and encouraging for me. Cheers and love from Argentina

@Pittsburghfix 4 жыл бұрын

Just fixed my first motherboard, thanks to this channel. Mosfet had blown due to voltage being injected into the Ethernet port. Switched it out with one from a parts board and even though 2 of the pads were damaged it still worked when I bridged the three pins together, they were connected originally anyway, and it seems to be working now.

@poptartmcjelly7054 6 жыл бұрын

Not too long ago my friend brought a Toshiba laptop to me to fix for him. He told me it has been repaired two years ago and when i took it apart i found a big piece of copper wire across one of the 19V mosfets. Turns out one of the mosfets shorted out and the previous guy who fixed the board put a wire across one of the mosfets that didn't short out so basically the protection circuit was completely omitted. All it took to fix the board was to replace the one shorted out mosfet with a working one and the laptop works fine now and for a cheap budget laptop it has a great keyboard.

@joeycarr1398 6 жыл бұрын

How much $ should be charge for that job?

@joliettt Жыл бұрын

I'm an electrical engineer, long retired. You are the best technician I ever met. I love fixing things myself too. That's why my refrigerator is 35 years old, my electric stove 35 years old, etc. I fixed the electrical power display on my stove so many times, using two broken displays to fix one. My Porsche 944 lasted 550,000 miles. Anyway, I wish you could show a video reading the pins off a USB power connector in my Dell 9365. Good luck. I'd send you my Dell, but you're in the UK, correct?

@jshaw4757 Жыл бұрын

I'm looking into repairing electronics mainly TV and laptop but anything n everything really I have bought all the tools necessary and I'm considering getting a thermal image camera as I intend too fix boards myself but I just wondered if you have any advice in general you could share if you get a moment...cheers mate 👍

@jshaw4757 Жыл бұрын

I know that's a broad question 😂...but just wondered if you could maybe give me advice when I get started on things would really appreciate it if possible thanks again

@janermejia555 2 жыл бұрын

Thanks for taking the time to explain the process through which faulty components are found, I find your videos very enriching. Keep up the good work, you deserve all the success that life can bring you.

@belleviebeautifullife8520 4 жыл бұрын

Am really learning more from your videos and I love the way you diagnose board and the explanation and I am still learning more because I want to start my fixing business. Thank you so so much. Sunday from Nigeria.

@arielcastro2810 5 жыл бұрын

a pesar de muchas criticas que tienes por esta reparacion..revivi una asus s451lb que llevaba muerta 8 meses por polaridad invertida...le hice jumper en el mosfet y revivio...carga y funciona perfectamente desde hace 4 meses..gracias maestro!

@romanb.6905 6 жыл бұрын

The first time, I see a guy, who is happy, when the notebook is not working ;-)

@gile849 5 жыл бұрын

very hard to find problem on board when randomly work. must testing for days... Beter is not working at all for repairing.

@n4_ku 5 жыл бұрын

You bit me to it 6 month earlier, damn you are good.

@jarnovilen5259 4 жыл бұрын

Every man who earns his living from dead laptops is happy seeing one!

@TanPham-sn3fc 3 жыл бұрын

He's like God, resurrecting dead laptops!

@roman4717 3 жыл бұрын

How fix hat air machine

@israeltongi 3 жыл бұрын

I want to thank you for the time and knowledge you give of yourself. I learned a lot hoping to see more videos at this level.

@fourkings7897 4 жыл бұрын

KZfaq just recommended me this, and i sub... Great video and the way you explain... 👍🏻👍🏻

@rogerrubio5055 4 жыл бұрын

Interesting video

@WilliamMabote-xg7mz 5 ай бұрын

You are good sir.i once repaired a laptop screen that was not powering backlights.you the best.thanks for your videos

@eugenenault4935 Жыл бұрын

By passing the mosfet is not a safety issue? Why not track down loss of gate voltage. Enjoy watching your videos , educational and very calming to watch. Thank you

@winstongrundy7289 5 жыл бұрын

i like how u teach this.i learn by watching easier then reading.ty bro

@massimilianobarresi. 4 жыл бұрын

"Good the MOSFET is out and replace that MOSFET.. of course we replace the MOSFET.. of course.. what do you think about me?" i love this man xD

@kobericha 4 жыл бұрын

maybe you know why mosfet was not replaced?

@asedeyhot123 3 жыл бұрын

waoh, i'm so happy right now.... watching your videos is the best thing I did since last month, My laptop m6-ae151dx isn't charging any battery , found out the useless capacitor after the battery driver shorted , I knew it was the one cos it looked a bit discoloured. chipped it off with a soldering iron and , walah.....Laptop working perfectly so so happy...that's over 200 USD saved

@jetraid 6 жыл бұрын

Could be the mosfet gate have a short circuit, maybe testing the gate after remove the mosfet you have the voltage and can replace it for a new one.

@TheBaregel 5 жыл бұрын

hard to believe ,the gate is isolated from D and S

@freeblowjobforall2697 5 жыл бұрын

@@TheBaregel Yea but if there is issue, mosfet is broken, the gate can be shorted with S or D

@carlossartori1818 6 жыл бұрын

OK, Mr Sorin! Congratulations by your videos. From brothers tecnicians of Brazil!

@jasengibson6619 3 ай бұрын

Those intermittent sometimes-it-works issues are painful. Occassionally they'll be from faulty discrete components, but most commonly it's going to be a simple physical layer problem--loose connection to a component or cable, cracked soldier line/soldiered pin loose in the socket, screw/frame metal shorting a circuit, slight break in an internal ribbon cable--and just by moving it, or holding it differently, flexing the frame in just the right way, you either make or break the intermittent connection.

@Ask_joe 5 жыл бұрын

" i dont care and i dont want to know " thats awsome like your repair ethics keep up with the videos!!!

@mehtabmanik 6 жыл бұрын

I enjoy your talk beside the fault detection and repair. 👌👍

@michaelmccloy9466 5 жыл бұрын

Hi Sorin, I missed this one in Nov. A really good one for me as I just watched your motherboard videos, it's all making much more sense! One thing I am having a problem with still is the recognition of some of the other 6 or 8 legged chips as you go around finding the power supplies. What are they? (I can't be the only one surely), my excuse is I didn't start leaning this stuff until I was 74 yrs old. Since this job came in as a MB are you sure he is not one of your applying the power supply here or there students?

@lgflanang 6 жыл бұрын

Practical education at its best. Thank you.

@hayatuworku3793 4 жыл бұрын

Thank you for your effort in sharing your experience!! I am learning a lot....

@computersrepaircotesaint-l7407 6 жыл бұрын

So the mosfet was good it just didn't receive the voltage on the gate to open it? What a bypass Thanks again

@techmonster2632 6 жыл бұрын

mosfet getting signal on the gate from other component , so the other component is bad if the mosfet is good in this case>>lol

@elizabethtorres6069 3 жыл бұрын

2:35 Frame I just started watching, there might be a short around the wiring in the screen panel, because when you layed it down it turned on. Your hands are around the display,and hinges. so was I right? Oh? We are not working on that one??? Ok next.

@Keythong 4 жыл бұрын

So my understanding is that the mosfet is fine but there is no voltage on the gate because of some other faulty component? Is this correct, and if so what voltage should you expect to see on the gate in a working laptop? Also, why not trace back from the gate to try to identify the faulty component, or is it just too time consuming and it doesn't matter so much? Thanks in advance for sharing your knowledge, it is really appreciated.

@deepaknanda1113 9 ай бұрын

Did u got ur answe ?

@haikalhakim 4 жыл бұрын

I love your channel...I learn a lot from your channel how to repair a PC/LAPTOP....

@switzzzz1 4 жыл бұрын

Great video now l know why newer mosfets come in two in one chips to stop Sorin nicking one.

@donaldfilbert4832 3 жыл бұрын

Very interesting. So - in summary. It looks like you kept the shorting wire in place instead of the mosfet - and still don’t know why there is no voltage on the gate and/or if the MOSFET is bad - or if the circuit feeding the MOSFET gate is bad !! So if that gate feed comes from the power management chip - aren't you worried that there may be some valid reason the power management chip isn't turning on the mosfet? Is there a possibility down the line that a possible real error might cause the motherboard or CPU or something to burn up??

@mtngoat61 Жыл бұрын

Maybe an intermittent or dirty/oxidized contact on-off button for that first lab top which turned on most of the time but not others.

@QARepair Жыл бұрын

I like Your way, you have budget cheap tools but your knowledge is worth much much more

@axelcomC3 6 жыл бұрын

I Respect professionals in their job!

@raduandrei7947 5 жыл бұрын

I think some ``engineers`` are too tough with the comments. I prefer to short circuit a mosfet rather than throw away a new board or spend a day to find out why the mosfet does not get a signal in the gate. I think Mr. sorin does it because otherwise it would not be cost-effective to fix this.He just repair it so we do not throw it in the garbage because he cares and he likes this things.

@kailasingle460 Жыл бұрын

Your explaining method is fantastic. But one question is there Sir what will happen if we dont connect new MOSFET and make just jumper directly.

@ovalwingnut Жыл бұрын

You are the Electron Whisperer... Good show.

@antonioss6620 3 жыл бұрын

You are the master of the masters. Thanks for your knowledge.

@MOONTECHbd 6 жыл бұрын

I like your Working process ...keep uploading with new one ! Thanks

@Rendraco79 6 жыл бұрын

THE EXPERIENCE ITSELF TELLS IT ALL. SO THANKFUL TEACHER! GREETINGS FROM COLOMBIA.

@tonsolar 6 жыл бұрын

all of your videos was fantastic, easy to understand and follow! i like the way you teach very professional. thank you sir. Dave here. . (=

@DeolTech 4 жыл бұрын

Good work sir .. thanks for share your experiences...sir iam from India I like your all videos..God bless you

@Nightowl_IT 2 жыл бұрын

That laptop has a short that is only on if it is flat on the table. Check for a loose cable or dead solder joints.

@sa112fpu2 5 жыл бұрын

Thanks Sir, at your beginning of your presentation, it was very funny!!, I like your work and I would like to get more idea from you.

@Martin-ot7xj 2 жыл бұрын

Hi there , this tutorial video is absolutely is one of your best tutorial and is absolutely for beginners , you explained very simple and very good . please make more tutorial like this . as you can see you explain step by step . kindly make a tutorial video about how we can use power supply for diagnose short on mainboard for beginners like this video . thnx

@Mora_Art-r3t Жыл бұрын

Omg this guy is so Good wish I had this knowledge.

@jamesjakpo4197 5 жыл бұрын

well explian sir,i really like your explanation on repair's of laptop.

@techmanray2355 4 жыл бұрын

This platform is the best boss.

@zanthiel2009 4 жыл бұрын

Thank you! Master Class Technique

@ElTexMexAlex 5 жыл бұрын

Lol that looks exactly like the hp motherboard im trying to fix. Same problem except I shorted the board by accident and it had no video at first but no gpu chip. I have been told that mosfet could be my problem. One thing I still cant understand is why I would have no video because everybody likes to point at the gpu and it becomes confusing to people who dont have a gpu. Thanks for the video, very helpful.

@zyxnull 6 жыл бұрын

My superpower is the ability to attract machines that randomly work as the first one on this video (curse maybe?), have one right next to me that took me a very long time to pinpoint

@datiller9035 6 жыл бұрын

The Best Walkthrough video ever!!

@NicholasDaniel11 4 жыл бұрын

Thank you very much for this knowledge this is helping me as a young technician

@onyetechcomputers9040 2 жыл бұрын

I deeply appreciate your effort in making these wonderful and perfect videos. Which has helped me alot. May God almighty supply you more wisdom and strength and long life.

@tikaziitech Жыл бұрын

Nothing to say about you you are the best thank you very much

@hamsterkombat439 2 жыл бұрын

Sorin everyone admires your technical talent and I do too , but this time I want to say I love when you laugh :) 1:36

@ultrashock3202 4 жыл бұрын

First time u show , as on the gate is no power so propably the mosfet is good , now we know how to continue.

@meshakjames8186 5 жыл бұрын

your method is the best

@Kipster848 6 жыл бұрын

Took some water damage from underneath (sat on a wet table). Computer boots up, but cooling fans run continuously and computer runs very slow. Hard drive removed.

@chrischristensen8516 5 жыл бұрын

the wizard of electronics strikes again ;-) nice to watch you working and explaining, thx

@Labyrnthdom 5 жыл бұрын

So how do you know what leg to jumper to. In order to pass the 19v ? I learned a few things from this video. But where I got lost was when you put the jumper and why not put a new mosfet?

@TheBaregel 5 жыл бұрын

the mosfet is fine,there is not input voltage to the gate from somewhere else that failed,he just bypass it,im not sure about the consequences of that move but i guess he knows his stuff

@jaimereyes4157 5 жыл бұрын

That comes from the way a MOSFET works, it is just like a water valve. The Gate controls the flow of water, on or off. If you bypass the gate (putting a jumper from input to output) you're just bypassing the gate. Also, the water in this case is a very very high current so you gotta be careful. Mosfets are essentially built, most of the time by 3 terminals.

@gabrielgundulf7139 5 жыл бұрын

that first laptop seemed to fault when laying down normally. but as soon as you put it on the side it worked xD gravity assisted fix haha

@luckyluken 4 жыл бұрын

Really nice videos, keep up the fine work, very very good

@satriorudi3742 4 жыл бұрын

Thanks mr Sorin you the master

@roshnivaldar2746 Жыл бұрын

good video on how to fault to a component level. thanks

@sniper5406 3 жыл бұрын

2:06 people complain about the laptop not working, Sorin complain about the laptop working lol

@johnathanasiou9284 3 жыл бұрын

Awesome, simple tips. Mulțumesc mult Sorin !!

@CA-AkshayDhake 4 жыл бұрын

Hello I have been having an issue with my laptop .No power,even when plugged no charging light . I take out the battery and put the charger,a high frequency constant sound comes from near the charging port. Please tell me what could be the issue

@felizhielerfezull8033 4 жыл бұрын

Did you get a solution for your issue? I have a similar problem in aToshiba E45w laptop. Power in is 19V as normal but no power light or even charging light, and I have tested each point but no joy. I am hoping issue is a mosfet.

@earthelder2065 5 жыл бұрын

absolutely fantastic!! great video!! Thank you very much Master....

@oscargrouch8256 3 жыл бұрын

Does the bad mosfet have to be removed? or can you bridge it in place?

@waeiltobgy5301 4 жыл бұрын

good diagnostic and fast solution to get error ,

@besllu8116 5 жыл бұрын

Nice video, you are so calm an logical it is pleasure to watch you figuring things out. Subscribing.

@sherazrizvi9977 6 жыл бұрын

so detailed very thankfull

@verdunelectronics9985 6 жыл бұрын

i loved this video sorin you are funny

@nsohgodwill8612 3 жыл бұрын

what a great teacher

@marko176schneider5 4 жыл бұрын

Super Video.Danke!

@seren7939 4 жыл бұрын

good way of teaching..I like our accent also ;)

@Maniii2020 5 жыл бұрын

I loved this video sorin. nice job

@pedrof.7821 6 жыл бұрын

Thank you for your awesome video once again. Quick question that got me curious, if you short those protection mosfets, are you still able to press the power bottom for 10seconds, forcing the shout down?

@johndzikunu9986 6 жыл бұрын

You are ecellent, great. I have been following you videos with keen interest.

@johnf3278 4 жыл бұрын

Great video learn so much. Can I ask you common problem with older dell.. "battery not recognise" and it won't charge. Could you find a fix. Why do they care what battery I use.

@tttuberc 3 жыл бұрын

I was hoping to see what you find on that Toshiba. I have a Samsung laptop that behaves that way for several days then doesn't turn on any more

@BenBek64 5 жыл бұрын

Hey man, how do you know where is the path from the charging (plus pin) (or how do you know where is the path going to another chip etc..). I don't really understand your smart mind to find it. I don't know to identify from which point the path is going to the another

@carlosbetancourt316 5 жыл бұрын

Schematics

@theEskalaator 5 жыл бұрын

They are usually next to power input, you can see big trace comming from red wire right into these mosfets. I have one motherboard where they are completely blown, so it was easy to find :-D

@nosebluntbob7124 3 жыл бұрын

Ever heard of mosfets not working then working a couple times for a short period again before they die. Trying to diagnose an xbox that was not working then worked twice for about 5 mins a few months later that is now not working again haha. Board has signs of short or ground out. But seems odd that a mosfets would fail intermittently

@Sakhap96 6 жыл бұрын

very very great job... thanks for all your lesson💪💪💪👏👏👏

@ebeemmanuel5512 Жыл бұрын

I want to come over there sir Sorin

@veselanota 5 жыл бұрын

master please show us same principles of this diagnosis on the desktop motherboards , thank you!

@tony42hajdu 3 жыл бұрын

I love Sorins evil laugh :D

@seckinseckin3919 2 жыл бұрын

if your board is good you can not test it with power supply yes but injecting 1 volt instead of 19 volt will not be harmful for it. So you can test board with power supply if it is 1 volt

@Umski 5 жыл бұрын

I wonder if Louis Rossman would ever do this?

@nackedballs 5 жыл бұрын

Rosman has specialized himself in repairing Apple Macbooks and has a totally different approach in finding the faults... For who knows how to read the schematics and has the motherboard layouts to pinpoint exactly the position of each component, can "easily" follow up on the board and measure voltage and compare to the given ones on the schematics, when they don´t match, just simply replace the faulty component and so on... of course if the issue is power supply. Don´t get me wrong, Rosman has a load of knowledge on repairing Macbooks, he has practically all the necessary high-end tools to repair any Macbook out there on the market and certainly a good professional on this matter. Sorin "no schematics nur board layouts" is the "Brute Force" type of professional, he has gained a lot of experience throughout his carrier, with a genius touch/sense to find the issue and repair it, even if he has to remove a mosfet, diode, and solder a wire in its place... At the end of the day the notebook is working and we all are happy. Sure if Sorin had the component to be replaced in the store he would replace it... I think... LoL

@Umski 5 жыл бұрын

@@nackedballs thanks, yes it was a 'tongue-in-cheek' comment really - as an amateur repairer myself there is a lot that can be taken away from both approaches - as you say Louis has superb knowledge (and spares) for a fairly small range of products, Sorin has a much wider remit of products he has in front of him and a wealth of experience plus the fundamental electronics in order to fix stuff from scratch - much respect to both of them :)

@theEskalaator 5 жыл бұрын

I personally don't see point of that first mos-fet. In most schematics there is only Power rail on source and one resistor between source and gate. That's it. Mabe it is some protection? Who knows...

@AndrewTuboro 6 жыл бұрын

Wow.😃😃😃 It's amazing.. I learned a lot from your video..

@johnkarlogallardo9158 4 жыл бұрын

I was waiting for you to repair the Toshiba Satellite one coz I have the same laptop just hanging around and I wanna try to repaid it so I needed the walk around 😅😂