The Most Common Fault On a Laptop When is Not Coming on, Dead Mosfet
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- เผยแพร่เมื่อ 20 พ.ย. 2017
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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
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.
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.
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.
How much $ should be charge for that job?
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.
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.
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!
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?
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 👍
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
i like how u teach this.i learn by watching easier then reading.ty bro
I enjoy your talk beside the fault detection and repair. 👌👍
Thank you for your effort in sharing your experience!! I am learning a lot....
Practical education at its best. Thank you.
OK, Mr Sorin! Congratulations by your videos. From brothers tecnicians of Brazil!
TH-cam just recommended me this, and i sub... Great video and the way you explain... 👍🏻👍🏻
Interesting video
I like your Working process ...keep uploading with new one ! Thanks
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?
all of your videos was fantastic, easy to understand and follow! i like the way you teach very professional. thank you sir. Dave here. . (=
You are the master of the masters. Thanks for your knowledge.
You are good sir.i once repaired a laptop screen that was not powering backlights.you the best.thanks for your videos
Thank you very much for this knowledge this is helping me as a young technician
so detailed very thankfull
Amazing. Learned a lot. Thank you.
The first time, I see a guy, who is happy, when the notebook is not working ;-)
very hard to find problem on board when randomly work. must testing for days... Beter is not working at all for repairing.
You bit me to it 6 month earlier, damn you are good.
Every man who earns his living from dead laptops is happy seeing one!
He's like God, resurrecting dead laptops!
How fix hat air machine
Awesome, simple tips. Mulțumesc mult Sorin !!
Thank you! Master Class Technique
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.
Nice video, you are so calm an logical it is pleasure to watch you figuring things out. Subscribing.
I love your channel...I learn a lot from your channel how to repair a PC/LAPTOP....
absolutely fantastic!! great video!! Thank you very much Master....
You are ecellent, great. I have been following you videos with keen interest.
very very great job... thanks for all your lesson💪💪💪👏👏👏
well explian sir,i really like your explanation on repair's of laptop.
Thank's, you really are the best. This video did help me a lot.
The Best Walkthrough video ever!!
Really great work here. Thanks
Really nice videos, keep up the fine work, very very good
Great video explained clearly, thank you
hi just a question, did you solder that middle part with pin 2? also can you do that way to pins 1,2 and 3?
by the way i love all your videos
Just started watching your channel. Thanks for sharing. Boot loop for Lenovo video?
I Respect professionals in their job!
very nice job, thanks for all your videos
I like Your way, you have budget cheap tools but your knowledge is worth much much more
Hi! What pad are you using here for cooling the processor?
good video on how to fault to a component level. thanks
I loved this video sorin. nice job
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?
Great video now l know why newer mosfets come in two in one chips to stop Sorin nicking one.
Hey...great video...I was wondering how thin wire did you use?
BR from Slovenia
Thank you for a great video!
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.
thanks sir. I'm learning a lot. More lessons to come :)
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
Great explanation. thank you.!!!!!
Your so awesome and i am same to service in laptop and desktop Yours some technic help in my problem solve...
Super Video.Danke!
Wow.😃😃😃 It's amazing.. I learned a lot from your video..
nice :) very detailed explaination keep up the good work
Omg this guy is so Good wish I had this knowledge.
Thank you for your help
What are those cameras that you use to show some of the equipment?
wow inpormative thankyou so much..
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.
Good work sir .. thanks for share your experiences...sir iam from India I like your all videos..God bless you
can i ask what section do short in mosfet? is it the drain and source? thank u and more power
the wizard of electronics strikes again ;-) nice to watch you working and explaining, thx
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
great work much appreciated
I know this is old, but I hope you still read questions. You have 19 volts on one side of the cap after the mosfet, what do you read on the other side of the of the cap. I have a video card where it has2 pin(3 pins but the center drain is cut off) and I get 12 volts at the drain but nothing out of the Source. There are 7 of these right together . 2 of them read 12 volts in, nothing out and nothing on the rest at all. I tried to check the caps as you did to check for short but I don't know what I should read on the second side of the cap. Should it be the same on both sides of the cap? If you find the time I hope you could tell me about the other side of the cap and or what to look for. I just purchased another of these boards so that I will have something to compare to. Thanks for your videos.
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
Thanks mr Sorin you the master
very nice i learned a lot from your video Sir,, keep sharing GOD bless
hi i need a help to find out a SMD Diode (PJ0266) on powersupply area before the MOSFET and its connected reverse bias (where 19V) i couldnt find out the model number of this one i belive this diode for overvoltage protection ( may be a zener) . if you know any equivalent component please let me know
your method is the best
Is it acceptable to have "a short" signal through the secondary Mosfet's beside "the coil", even when the gate is drained or grounded to close the gate? Are some Mosfet's designed to sound as a short between the two sides of a Mosfet that is not the gate?
" i dont care and i dont want to know " thats awsome like your repair ethics keep up with the videos!!!
i loved this video sorin you are funny
hi, I insert the power cord tested the adapter which is getting power also the pins in the power connector waited for minute but nothings getting hot. what else to i need to do thank you.
Hello. can i use that method in shorted mosfet too?
Excelente vídeo.. Educational..
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
good diagnostic and fast solution to get error ,
Do all the pins on the charger port from the motherboard have to read 19v? Only 2 of 8 pins read 19v for me.
Felicitari !!!!
Great Job
I checked my HP motherboard and the path on the power rail checked out ok until the 2nd mosfet which had no output voltage. Does that mean that the startup chip doing it's job and shutting things down or perhaps the mosfet is faulty or because there is a fault downstream? if so then taking out 2nd mosfet and replacing with a wire would do no good...correct?
Excellent video
Great video
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.
many thanks, sir.
Thank you teacher
Can you please tell me where is ur shop in uk?
master please show us same principles of this diagnosis on the desktop motherboards , thank you!
Nothing to say about you you are the best thank you very much
Does the bad mosfet have to be removed? or can you bridge it in place?
what a great teacher
The capacitor near mosfet what value does it have, how many uf does it have?
Sir I have hp laptop board part no LA-C781P having one MOSFET no mdu1516 short but I am not getting in the market is any equivalent MOSFET I can use
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.
hard to believe ,the gate is isolated from D and S
@@TheBaregel Yea but if there is issue, mosfet is broken, the gate can be shorted with S or D
Very good sir
Any suggestions when a motherboard has no power, no charge, works on battery and the 1st and 2nd mosfets have been replaced. A BQ24725 is driving the gates for approx 20ms and then turns them off. 1.3s later the gate turns on again... etc... Jumping the 1st mosfet makes the laptop work but I noticed a very heavy current draw when the battery and AC charger are plugged with the bridge in place. Checked all caps and resistors to gate, ACdetect, etc...