Lenovo laptop, a smoking one - no power not charging - motherboard repair
Vložit
- čas přidán 14. 04. 2019
- Ebay store: www.ebay.co.uk/usr/sorinelect...
WebSite: sorinelectronics.com/
Patreon support: / electronicsrepairschool
CZcams Members: / @electronicsrepairschool
Forum: forum.sorinelectronics.com/
Discord: www.sorinelectronics.com/discord
My tools: www.amazon.co.uk/shop/electro...
PayPal me: www.paypal.com/paypalme/Elect... - Věda a technologie
wow that was some fast reflexes there Sorin.. I slowed the vid way down to see the fire and smoke but your hand just disappeared.. You see this is why I wait to work on a lap top.. you have taught me so much already.. but here is a tricky one.. so much to learn.. and being 68 I learn a bit slower than I used to.. thanks Sorin.. for not giving up on your teaching channel when it would be so easy to do so.. I appreciate you and your efforts very much..
Hey there Sorin, I was getting worried about you! Glad to see you back and thanks for the video
Hello Sorin. Happy to see you again. I've learnt a lot from you here. And I begun to repaiir electronic stuffs. First Dead Proline TV repaired one week ago: Broken fuse, two broken AC to DC bridge diodes, one 0.03 ohm resistor, one 470 ohm smd resistor, one 1kv ceramic capcitor, finally the R36 6 pins control chip ( the only component bought from ebay, 10 pieces R36 for 2.5 us$, waitted for 10 days). Thx a lot and see you soon.
Love the videos! My personal favorite are the 1hr work-flow videos.
With your help, I've been able to fix quite a few things, and I'm eager for more! As a quick story, would you believe I purchased a $1500 laptop for $400 that wouldn't boot, randomly boot if left running for 10 minutes with a BIOS reset error, and function just fine until powered off again. Ended up being a replacement BIOS battery that had the wire polarity reversed! Can't make these things up... Also can't overlook the simplest things.
Thanks again Sorin, and keep up the good work!
Glad to see you again and thanks for the video
.
Nice work Sorin. Thank you for the video. Always enjoy watching them. Hope you are well!
I had a mishap which was similar to this as one of my first laptop motherboard repairs. I plugged in the charger and a capacitor popped, smoked up and started glowing red. My first instinct wasn't to unplug the charger, but to instantly try to stab the capacitor off of the face of the board with my test leads. All alone I was sooo embarrassed with myself. I cried that night. and retired from board repairs for a while.
Thanks so much for this video. I'm motivated and reminded myself not to be a bitch and to not give up. Also not to forget about continuity/diode mode. I hope to do BGA repairs one day.
I am Speechless
That was very satisfying to watch
Thanks Sorin
Welcome back Sorin, I miss you buddy. Great to see you!
thanks Sorin, I have one of these crappy ones. Gonna try and fix it by watching your videos. Thanks for your time and explanation, it's very much appreciated!
Sorin, you made me happy, that you fixed that board
I hope you heal soon Sorin, thanks for this new video
Very good job, to recover your health and thanks for the master class. Greetings from Argentina.
Welcome back Mr Sorin 😀
what a treat 2 video's in one day
Nice to hear you Sorin, Job well done. Thank you.
very nice repair, this video is refreshing in its repair style
I'm not a simple guy,I see Sorin and I press the like button :) Come to Besiktas Sorin...
same here...
Awesome had to watch it 2 times since you didn't post for a while.
One week off, and all your subscribers felt it, terrible to have no videos for a week :-) Glad you back and hope that you had a good vacation.
You really are a very patient clever lad Sorin...
Welcome Back Sorin, i hope you will well soon , i find you toke cold that holiday
Thanks to you I already know how to repair the old power connector. Thanks and I hope to give it.
sparkling Monday! welcome back Sorin. take care
That was crazy. Nice repair
Sorin,
What was that you are burning the board 😂😂😂 great fix thank you for the great work you are still the best 🙏
The fire was awesome , felt like in a James bond movie héhé , keep up the good work .
Am gasit canalul acum cateva zile, si banuiam nationalitatea dvs, dar acuma sunt sigur dupa ce v-am auzit vorbind cu colegul. Vroiam sa va multumescpentru videouri, sunt foarte educative. Aveti like si subscribe de la mine. Numai bine!
very nice mr. sir. 👍
Felicitari ptr ceea ce faci
I always learn something from Sorin's videos and im greatful that he takes the time to share this knowledge with us. But without proper training, we cannot learn correctly since we are not taught the fundamentals. We need lessons to learn the right procedure and what to look for when we open these devices up. Maybe when Sorin feels better he can start up his lessons again. 😅
great job here Sorin
Foarte interesante și educative filmulețe d-voastră... Maestre... Imi pare nespus de bine ca am dat peste canalul d-voastră... Vă doresc multă sănătate și fericire alături de cei dragi și cât mai multe succese... Țineți-o tot așa!!! Apropo TV led sau lcd nu reparații??? Vă mulțumesc... 😘😘😘
Sir i love your videos, thanks for share your knowledge, i fix a k53 thanks to you. i will always be grateful for that.
you are good teacher i do the same
on a daily basis
hey there sir, i'm new her. I am laptop tech , a beginner one. your video help a lot on me. thanks.
Sorin it would ve great if you could post a video on repairing laptop chargers.
great job
thanks sir for your tutorial
That Smoke :-) Great Job !
Thank you good video
exultant teacher always something to learn
Thanks for your vedios Mr Sorin ,l will be an engeneer very soon
I`m simple guy, i see Sorin and i press the like button ;)
me two
You my friend are super kewl!
me too
I'am much more simple than you, even your comment i press the like button.
Sorin, wonderful stuff once again. I have learned very much from you. How come you are still using your old soldering iron? What happened to the TS100 or was 80?
Great vieeo, thanks for sharing 👍
Was a good idea to check for shorts BEFORE putting 20V after the mosfet...
Well, you found more easily the problem...
great fix on video
Hy Sorin, nice to see you again. Maybe the charger of the customer is not working
Nice one master
so are mosfets pretty interchangeable between boards?
oh man, you amaze me , lol,
taking out that super io chip in less than 10 seconds and replace it , whithout cleaning , i tryied some times with dead boards and i still can not do it so clean, darn , i need more practice and dead boards , lol,
greetings from Argentina
thank you sir
Funny Sorin quote of the day: _"Based on the smoke [ sniff ], it's a semi-conductor!"_ It's not the first time Mr. Sorin uses his nose to identify the type of burned-out component.
u found INCREDIBLE,.,.
I m ur big fan sir . Ur video is very helpful for me love u sir
Hi Mr. Sorin. Thank you for your CZcams videos, which make me want to learn electronics.
2 things from watching your videos:
A) I am a little confused as to when and how to use diode mode: what do the numbers in the readings--like: zero, or some other number--mean? And also, how is diode mode different from continuity mode? Note: One use of diode mode I remember was to identify the power supply to the ene and/or bios chips (AFTER removing power sources to the board). And continuity to ground ( with the beep ) was used to confirm a short to ground past a set of open mosfets. Diode mode is still not super clear to me, though... Can diode mode be used instead of a continuity check?
B) Lastly, with tiny SMD components, how can you tell which one is a capacitor vs. a resistor? Sometimes, they are so small, it is hard to tell them apart... Are SMD resistors always black, and SMD capacitors always beige? Also, if the SMD component has shorted, and you don't have access to schematics, how do you know what to replace it with? Note: as you indicated, in the case of capacitors, they are often used in parallel, so removing the failed one, or simply "jumping" it, might be ok. Also, as you said, there are plenty other capacitors downstream to take the load of the missing one... But for resistors, can we just run a wire instead of a failed resistor, or must it imperatively be replaced with a working one with the same rating?
your vidio is very very good , but i went to ask what materials need as bigninar
thinking, why not temporary bridge the 2nd mosfet with a 'test mosfet' or low current rated thermal trip/fuse, in a holder that clips in place, to continue with power rail voltage tests ?
Greetings from Turkey
i really love your works wish i can meet u on zoom
12:54 - take a look at the right bottom. When the mosfet blows up, then after the smoke, you will see "liquid". It is coming from that place on the board.
Mosfets don't have any liquid things inside, so from where that liquid is come from? What it is?
So llook on the chassis/cover close to that place- Do you see that " line" , that shiny spot? it is like a mark of dry liquid.
If there was no hard drive, then it means the user opene the laptop before, then took out the hard drive and maybe wash and clean the cover from liquid damage and then later pretend that nothing happend.
Some of that liquid stay left on the board under the cover, and client (and also sorin) didn't notice that. Maybe that is why that liquid made a short on the first mosfet, then after that it blows up the second mosfet (as you said on the video)
Is it possible?
this liquid is hot solder
hi if its ok i will make a bridge instead of replacing the mosfet? cause i cant find any mosfet like that..
when the smoke gets out its very hard to put back in
Noone wonders why it disappointingly does NOT start with the bridged first MOSFET and plugged charger, but surprisingly starts whith the buttery plugged in? 27:11
Was that factory flux or some liquid around the burnt mosfet? and how strange the laptop came on just after you plugged the battery but that was before replacing the mosfets
I don't understand that if that fet is shorted how the motherboard is powered on even though another mosfet is removed because that shorted mosfet gets input from the 2nd mosfet of 19v power section(from current sensing resister).
my wife had open heart surgery during mine -- but i felt that I could not repair the issue and i searched you had no videos on removal of a growth inside her heart, damn-it man you don't do open heart surgery either?
Nice vedio keep it up
Where are you gone for week ?
Love this channel ^^ it is electrical miracle haha
Great video, but a question: why does the Si4800B mosfet have 4 drain pins and 3 source pins? Is that just to provide extra connection locations?
It's to provide extra current fo fet. That's why gate has only one, small current.
hello sorin. nice too see u again. wish you best. i have question, need your help. i have HP pavilion dv6 laptop. touchpad not working. already changed with new one but not working. 100% Sure its not driver and its not on/off think.... please help me if u can. and i have another laptop board somethis is shorted in cpu area but nothing is getting hot with even 5 amp... please answer if u can. love u too much anyway :*
I have a Toshiba m305 powering on and sating battery not detected
Hi Sir.I have a Lenovo G550 working great with Batery .But not working with the charger.i have another lenovo were i charge the batery.Whats is the problem?
That behind looks familiar lol
As usual amazing job Sorin. 👍,
Just I have quick question, why ALWAYS there are two Mosfets in each power supply with the coil and resistor on the motherboard, I reviewed couple of your videos on Mosfets but still i did not get it, Why always Mosfets comes in two first one output is the second one input (in serial).
I don't know the answer for your question.
Two mosfet means;
1- more current can pass
2-more dissipate can heat goes
Smooke on the laptop....a fire on the sky :)
I have the 3 blinking lights when plugged in,, does not charge, trying to find a solution.
I shorted my t61 thinkpad. I replaced the fuse and have no 19v coming out of it or on the rail. The charging port is tested good. When I check mosfetts for voltage they give variable readings. Does that mean that they are blown? Thanks to anyone who can help.
Sorin just looked at Laptop...fixed...lol
I have a question for anyone to answer. After I make liquid Flux . What can I store it in .for easy use?
I am having same problem and go to repair shop they charge 15 $ but after one week same problem appears not charging
Sorin i'm dissapointed in you, No camp fire songs ha ha :-D :-D
I have a Lenovo x250 dead motherboard and it has no 3v and 5v, can u help with a solution pls
You shorted the mosphate pin when you put the positive prob make something burnt.😀
How can you tell if they are N or P channel?
Hello, i think my Lenovo G40-80 isnt getting cpu/ram core voltage properly but i dont know how to check. My symptoms are:
1. When i press power button, only power LED lits up but nothing happens (like cpu fan spinning), with battery the same, power+batt led lits up only.
2. Adapter working fine, delivering 19-20V through all power mosfets , tried different power supplies.
3. Battery is charging when i connect power jack.
4. No AC adapter+only battery, and only AC adapter+no battery - tried both combination,still nothing.
5. No shorts in the primary things (mosfets, caps etc)
Any suggestions?
Sorin, please get a fume extractor, even a cheapo pc fan one will still help.
I am worrying right now, My lenovo laptop is smoking through front bottom track pad side and some coming out of keyboard buttons. When I am putting charging on after that lights not turning on and It smokes!!! What Should I do?
👍👍👍
Why did you solder 3x pins on the second mosfet??
Probably to make sure the connection is right as these 3 are connected anyways.
I have the same problem with the lenovo g50 89 the black on but I put maybe about 20 volt with different charger couse I dont have so get litle bit fire from side where u put tu the stick so now the pc laptot is dead and smelling from the baterri some shit
u can help me please any your contact for u
Happy Easter Day Sorin
It was that easy to take that bridge out
mostly the problem of the laptop not charging or no power is the mosfet. am i right ?
Perfect... I have a question, why you need to put a jumper to 1 mospet? Thank you.. idol
Hi sir. Can you help me. I have a laptop for repair. And when I check the laptop. There are many Mosfet and capacitor missing. I tried to place new Mosfet and capacitor and i just follow your ideas on repairing laptop. And the laptop has power again and the fan spin just a while and stop but the laptop has no display. Can you help me? The laptop was repaired by other technician they are the one who stole th Mosfet and capacitor.
I have repaired a lot of laptops because of your good ideas on repairing iwish you can help me
Sorry for my bad English. :(
how come its easy for you to remove ic/mosfet with your hot air..im looking at the clock..its barely 15 seconds or less...congrats,.and thank you
It took 30 seconds count it.
maybe shorted usb? ive got usb short on 2 outlets but can't find the time, it might take you a few minutes but for me much more time! lol