Most common fault on a Dead Laptop
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- čas přidán 12. 11. 2018
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By carefully following this video, i have now repaired an ASUS laptop that has been dead for 12 months, thank you so much.
wow amazing
Michael Forde great. Good luck.
Well done - what was the fault in the end?
Nice bro
@@aaronlewis7553 shut the fuck up?
I have been watching your educating people on how to repair laptops etc and I must commend you on your patience dedication and generosity.
My name is Ron and I am from Melbourne Australia and although I can repair a few things as a hobby, I have never repaired laptops ot Iphones. Your explanation and demonstration on repairs have inspired me to try to fix some things after I have watched more of your videos.
Please ignore any negative comments from othrs and keep up the good works. There are plenty of us who appreciate you tireless efforts.
Kind regards,
Ron
Hi Ron. I fully agree with your written notes. You remind me of myself, and my efforts to fix all manner of Consumer Items. I am 70 years old, and electronics has (for me) been a lifelong pastime of repairing TV's / Radios + lots more. I still have a thirst for the knowledge. Working alone, the most difficult and frustrating part is not being able to discuss any electronic problems with another (educated) human being!!
Ron Perera you nailed it. Exactly the words that I'd like to repeat to Mr.Sorin. Thanks for the positive feedback. 👍😊
Peter Duxbury trust me I understand what you trying to convey. You sound so inspiring. Good luck and best wishes. 👍😊
@@peterduxbury927 - It's nice to read the interesting and inspiring comments one sometimes finds on videos. I hope, Peter, that you've availed yourself of all the other instructional, unformative vidoes just here on CZcams?
Please what is the use of the musfer
I've been working with and on electronics for 45+ years, and what I love most about it is that I can ALWAYS learn something new, like I did just now! That was a very fine piece of troubleshooting, but the way you explained each step of your process was very educational. I came to this video because I also have a dead laptop, and I was pretty much out of ideas, but now I'm quite confident that if I follow along again with this video, I will be able to bring it back to life. Thanks for sharing!
Did you manage to bring that laptop back to life following this video again?
Also with your experience level, maybe you would enjoy being part of the Discord server to receive and maybe give help?
@@Infiniti25 I would be interested to join a discord server to discuss these kind of repairs. Do you have a link?
May I join in too@@Infiniti25
Hello sir..
Im not repairing things for profit.. just super fascinated in how things work. I cant begin to tell you how much your videos mean!
Sharing knowledge like this is such an honorable thing to do.
Very grateful, always look forward to content like this.
Thanks to CALIPHATEHACKER he is so intelligent and real and doesn't charge much at all,You can contact him on Instagram...
Same I always been fascinated by electronics and how they work and I went to college. I got a degree in IT
Best laptop repair i've ever seen. Solid experience i may say. I learned a lot from you. Many thanks.
Nice video! I only wish I'd come across it sooner. I like the guy's no nonsense approach. He quickly tracks down the issue, and solves it without fuss. I also like the way he's thinking about his customers, and his primary concern is to help them, rather than to make as much out of them as he can. I wish we had people like that where I live!
He prolly already has plenty of money so it isn’t “everything” to him…. Folks who try to rip ppl off, most of the time, don’t have much at all
Precisely why I changed my major away from automotive technician and going into computers!
I admire your courage in presenting your assessment on when to quit. Am retired electronic technician(mostly worked for corporations, never on my own business), so I understand your judgement. Nice video. Keep on trucking buddy.
Hi redserpent can I Link up with you for some tutorials
I don't know how people can dislike Your videos.You passing Your knowledge to us in this short videos that You been learn thru years.That is just wonderfull.Thank You very much!
The dislikes are coming from repair technicians who think that videos like this are taking customers from them.
Maybe cause this exact fix ruined my battery and now my cpu running at 0.4 ghz
kudos.....thanks for the help!!!!! I love being able to get into the little fine spaces to diagnose and repair. Without your help on this issue i would have been running in circles!!!!!!! Thank you so much for the help!!!
Wow, that's really an amazing tech skills! I also have a dead laptop with built-in battery and trying to fix it. The video guides and gives some helpful hints what to do if someone has similar issue.
Sounds like the diode in the MOSFET died and kept the circuit from detecting the power supply. Yes, power has to pass through the diode built into the MOSFET before the circuit on the other side will turn the MOSFET on... Short the MOSFET for a moment and then the circuit will power the gate and try and turn it on. If the diode is dead then no initial power detection happens and no power on. It's a low resistance polarity protection circuit.
Yes!
Do you know what does the next MOSFET do? I assume for a load switch so the chipset can restart itself or something?
@@fullmoon6661 Usually there is a MOSFET next to the polarity protection MOSFET that controls the power from the battery going to the main power bus. The one from the battery would be in an ideal-diode circuit to prevent the power adapter from dumping power straight into the battery. The input polarity protection also acts a bit like an ideal-diode circuit that prevents the battery from discharging through the power adapter, so it serves a dual purpose and technically they are both ideal-diode type circuits...
Sorin indicates he detects 19V at Drain, 0.8V at Source and 0.8V at Gate of the big N-MOSFET AON6426 for this HP laptop. I have a dead Lenovo ThinkPad P50 with a big P-MOSFET AON6407. I get 20.4V at Source, 0V at Drain, and 17.3 volts at gate. The gate voltage is always there. Can you explain this based on your theory?
@@neverwasthere Without looking at it or a schematic I can't know for sure but this design probably has a couple of transistors controlling the gate of one or two MOSFETs. I'd look for some small sot-3 or similar transistors and test them and surrounding components.
What exactly does “shorting” the mosfet mean?
I like the idea of using voltage to check continuity and short circuits. If you have a high resolution meter you have a more procise location for the short circuit it helped me pin point a short on the circuit. Great videos ....
I love the simplicity of the way that the 8-pin IC Chip was removed and then (using calibrated fuse wire) bridging the Drain & Source in order to restore the 19vdc supply to the circuit.To say that the Motherboard is "complex" is an understatement! It is also extremely difficult for anyone to fully understand the full function of the 8 - pin IC Chip that you removed. Further to this, the pinout diagram would be needed - in order to ensure that you do - in fact bridge the Drain & Source. The IC device which was removed, handled the full current of the Laptop. There may have been the correct 'Gate' voltage present to turn the Mosfet on, but the device may have been faulty. I do appreciate everything that I have seen in this video, and I have been enlightened by your Tutorial. Thanks & regards from Sydney Australia.
Was the Gate shorted with the source?
@@irishguy200007 It was a possibility, but I cannot be certain.
Just want to say thank you for all these great videos. I'm fixing an HP pavilion dv5_1235dx now for my wife and your saving my life over here!
Toata stima !!! Tin sa multmesc pt toate informatiile pe care le-am acaparat din postariile dv!
im nearly 51 but but watching videos like this make me want to learn about electronics, id imagine there is a lot of satisfaction in fixing useful tools like this when they are broken
Thanks for sharing your knowledge.
you are cool man , i love the way you Tshoot components
Very helpful. I've been having to fix my pcs and laptops myself cos where I live the "experts" haven't got a clue. Your video is very helpful and also the way you speak has a very calming effect which is good because a broken pc can be so annoying!! Thanks!
You remind me of my father when he took computer repair courses. That was 26 or so years ago. Good memories. Thanks!
I'm going to spend the whole day/evening watching all videos from the start. Need to reduce the pile of electronics building up (hoarder) and throw out the unrepairables, or keep them for parts salvage?! Grateful for the leg up he has given me. I just love this stuff!
Keep em for spare parts, just organize your whole room. I need to do the same thing or so i've been saying for couple of years now! xD
This is awesome, I have been searching for this for a longtime, thank you so much
We used MOSFETs and other "surge suppression devices. Usually, they are not needed unless you have AC power that has a lot of surges and or lightning. Most of the time, just putting a good surge arrestor at the input to your building is plenty of protection.
Thanks a lot Sorin for this video, it always brings back memories (*good ones) for me to be able to diagnosed similar problems in my laptop checking and fixes. (*presently working on a Lenovo Legion laptop that won’t turn on and yet the voltage is present at the charging port but nothing on the other power supply like 3.3V, 5.0V, and the likes. Thanks again! Keep it up the tutorials! Love them all!
hello. did you get your's fixed? i have similar issue with HP C125. power indicator and charge led works fine at the jack.(white without battery and orange with battery. battery and charger all test fine.) Also at the activity led (bottom left of laptop from above). power indicator is fine. However, the thing won't boot to even the bios or spin up the HDD. No Beeps. Nothing but LEDS. Brand new CMOS battery. No HDD Activity LED. Black screen. 😐
@@Palmit_
My laptop did that and you can unplug the power lead hold down power button so all power is gone then plug in power lead press hold the power button for about 30 seconds you will see the light flash 📸 then try power it should boot to bios i have a battery now charging all power goes to battery but not out of it I pulled the battery open to get to the battery sercuit and 4 cells are fine I think it mosfet or cap short as only shows 10 v across 4 cells I believe this is Microsoft fault the day that it broke won't turn on and battery drain was the day google news said Russia has wiped data from Ukraine industry to wipe data but Russia had no reason to but usa bio labs was I bet the reason to wipe data to cover up bio labs and Microsoft did it blamed Russia just like 2016 I could not boot to bios the day that was reported I also see in log file on phone if a processor was newer than a set date or type basically new processor than update bios Microsoft has took control over the bios and to boot 3rd party or own operating systems you need permission of Microsoft to have keys 🔑 for it to boot so Microsoft has control from the point you press power and dictate what you can do on your own pc im going to downgrade to 10 and find out how to tale back bios this is another step in full control over data boot Linux and they will collect data while on it no privacy all about control and data and so they can tunnel bio medical and behaviour data no matter what system you on :(
@@BubstechDOTcom hai i hope you are doing great..
i got similar problem with hp laptop 15db series ..
Tried boot methods,reseat(pull out hdd,battery & putting back)
Still nothing happened.. same "no hard drive or ssd installed"
Checked (i saw) that hdd drive is fine,when a scamming local repair shop guy checked it
I akways knew MICROsoft doing this crally things.. but my younger brother bought this worst reviewed laptop for money i sent him
If there's anyway to bring it back,please say
Thank you 😇😃
10.03.2023 08:14 pm ist
Atleast you guys have charger lights and such… my Acer nitro 5 is completely dead.. brand new battery put in today and still dead dead. No power at all! No lights at all
Thank you for the very informative video , i manage to bring alive a dead laptop following your video , all the video's are great information source and so easy to learn , thank you again and keep up the good work .
This worked for my hp probook 650 G2.
Was ready to throw it away and wanted to try this repair as an last effort.
To open up the laptop and put everything back together is most of the work.
Measured voltage from power jack input, step by step, component by component, and the first mosfet seemed dead.
Made a bridge from small piece of electric cable across the mosfet, with use of solder iron... and guess what. Fixed!
Super thank you for this video!
Your feedback and your experience is as inspirational as the video "tutorial" itself. I have a solid HP that's on its last legs and when it gives up the ghost I will try and pull off this very "trick" provided the laptop promises to screw up one of its MOSFETs exactly as featured in the video:)
glad it got fixed im fixing my hp 640 g7, it wont turn on yet
@@jurnoss any luck its fixed?
@@OMARENGG22 display screen apparently was it
What a Gem of a video from 5 years ago. I have a HP Envy with similar problem and this has given me the confidence to go and take a closer look at the Motherboard. All other things have failed, and it's got to replace the motherboard or scrap it. Very well explained bit of troubleshooting and fixing. This video proves even the simplest of videos can share some very hidden knowledge these days! Awesome!
directo to the point.....what a awesome technician you are sir....salute
4 years of studying electrical technology (technician) summarized only by 24 minutes video. Thank you it works for me
Oh my gosh I finally found the best laptop repair website in the world! I was about to throw away my 2 dead hp laptops and about to buy 2 new ones but now it's working. I fixed them through your awesome tutorial. Thank you so much. I saved $600.00 today.
New to your channel, love the help I get from them! Thank you so much
Incredible job...
You are deep in this profession, lot of experience.
At around 19:00 to 19:15, when you say you have to find out and then suddenly you say it's complicated, kinda laughing moment but actually it is your depth knowledge about it which you try to express to watchers.. 👍👍
I had an old laptop went totally dead on me. I studied it and checked as much as I could with voltmeter. I studied and noticed that some of those tiny little resistor blocks that are surface mounted little bricks with no wires have numbers of their value ( very tiny ). I noticed some near power input were marked with 0.0 which I guess meant no resistance or some kind of jumper. I found one that didn’t seem to be ‘ jumping ‘ like it should so I managed to solder a small wire across that part of the circuit and ‘ voila ‘ it’s alive again.
Also known as “There, I Fixed It “
That's awesome. That's what i'm trying to do with my old laptop. My laptop's power led flashes on when i attempt to turn it on but immediately (less then a second) it shuts off. There's no time for the fans to even kick in and it's an old laptop so the the fans can be loud. What can be the issue?
@@thingshappen9199 I have the same issue, is yours a Toshiba ?
@@michaelkenny4124 It was an HP, the issue turned out to be the IDE SSD.
Things Happen hey i have the same issue, mine’s an hp as well. What did you do??
What was the power input of the brick that was jumping??
Sorin, thank you for a very interesting lesson and it was useful. I wish i had you for a teacher in the 70"s !
great job educating us young IT technicians. Appreciated
Sir you are a true professional and I like your way of methodically working through the root of the problem and to it's solving.
I have been watching your educating people on how to repair laptops etc and I must commend you on your patience dedication and generosity.
My name is Rana Irfan Jalal and I am from Pakistan and although I can repair a few things as a hobby, I have never repaired laptops ot Iphones. Your explanation and demonstration on repairs have inspired me to try to fix some things after I have watched more of your videos.
Please ignore any negative comments from othrs and keep up the good works. There are plenty of us who appreciate you tireless efforts.
Kind regards,
Rana Irfan Jalal ( Note :Same Ron Perera's Words and My Feelings ) !
Why are there multiple identical comments posted by different people on this video?
Just watched your video and I got to say thank you I feel confident enough that I may apply the same principles to a dead Dell 3000 Series Inspiron we'll see how it goes thanks again for your patience and that wonderful knowledge that makes it seem so easy
Jonathan Brown good luck to you and don't forget to keep us posted on what happened ok? 👍😊
How'd it turn out bro?
@@rayofcreation3996 it worked! Sure appreciate it!
Wow! Got my HP 250 G6 fixed doing exactly the same thing on the first mosfet on the underside of the motherboard. Thank you 💖!
I love this dodgy guy!!! I think what you are hinting about programmed obsolescence... I have so many nice laptop with the same symptoms, I had to thrown them in the trash. Sad! Thanks for you knowledge and time.
I hope this may be solution to my problem, thank you. Your voice and jokes remind me my friend, this bring back good memories of him. I could watch your channel only to listen and laugh over old times. This is good learning material, thank you and keep good work
I enjoy your laid back way repairing these items. I also enjoy the humor, "perhaps it is global warming, french fries, coca cola" hope to keep watching many more repairs for years to come.
I'm am new to computer repair. Followed this video and it was excellent!! Everything had correct readings... light turns white but laptop not working without battery. Can charge battery fine only with laptop powered down(orange light on). Will not charge while powered up or with power supply and no battery. Light does come on white but can not use unless battery is charged up. Then dies, and charges again and so on and so forth.
I just found your Channel ....you are my best of all....was looking for something like this channel ...thanks a lot mister for giving us your lights
Just found you on youtube and glad I did.
Great informative vids, thanks.
Thank you so much. You are a genius! I did it to my Toshiba and it came back to life!!!. It was a bit tricky to remove the chip though without the hot air tool but I managed. Seems like there was a lot of varnish on the board and chip which melted when I used my soldering iron.
Greetings from Cape Town. A million thank yous for this awesome troubleshoot and resolve Sorin. As a token of my gratitude, you are now an honorary recipient of Table Mountain :-)
love from johannesburg
I haven't tried it yet but learned something from this video. Thank you so much
Hi, I really love your videos. You give good explanations and you always manage to fix the laptops. Unfortunatelly as long as I am concerned and all the lessons you give I am unable to fix my laptop even if I checked all you have said. My Asus just won't start and maybe I am a lousy electrician :-) or a very bad pupil hahahaaaa... anyway I keep on looking at your videos and sometime I hope to understand the right thing to do. Keep on rocking my friend!
Again you make everything seem simple!! Completely dead laptop but after that small wiring shorting the 19V and letting it pass through everything works again!! Awesome Mr Sorin! Thank you again for letting us know!
Thank you again Mr Sorin
He didn't make videos of all the times it didn't work...!
Hey hey! love your videos! I am just starting to get into soldering work and low and behold. i get one of these in today at my shop. My question is, once i find which mosfit is causing the issue, what fused line should i use? Kind regards! Love your channel
I've have repaired some laptops in the past but I can learn a lot from you just as I learned today. What the real problem is, doesn't matter If it's running again and stable it's enough.
I'm looking for dead laptops from now and with you as my teacher. Ha,ha,ha.
My grandma’s tower was running slow after 10-15 minutes of it being one. It had blue screened on her. She called me up asking what it could be. Told her that it is usually related to hardware, drivers, or a virus. Ended up being that the heat sink was wearing an alpaca sweater and was over heating. I still ran a few checks on the ram, hard drive, and ran a virus check just to make sure.
It's not always that simple, I had many laptops with no short on the board, even when bypassing both mosfets still won't power on. I'm not that lucky. Thanks for sharing. Best teacher
Yep same here
@@retrogamer33 yeh some will solved some the mosfet won't open because of other problem, maybe the IO chip.
Why if you repaired many laptops and not can see what the problem is? I saw it in 1 second when he opend the laptop. I'm shocked of all the people here that also repair computers like me can not see it. You should be ashamed.
@@electronicsfreakjasper see what?
@@computersrepaircotesaint-l7407 hi, how are you?
I have some dead asus to fix. I jump on the first mosfet like the video and the laptop is on, all normal but the laptop is not charging. You know why?
You sir are topnotch, no beating around the bush. I Love the video. I am a loyal subscriber now.
I'm having great chance to repair my dead notebook after watching your video. Really great help!
New subscriber here. Im searching for this channel for so long. Finally find it
Melwin Jay Asturias I know! 😀
Stumbled onto your site.. very interesting.. I have always like to watch troubleshooters (people that know what they are doing) fixing things.. I am not a big electronic fella.. But I have always been fascinated by it I can do/understand the basics but that is about it.. thanks for the share! I am off to watch more of your vids... Who know at 66 maybe I can learn a new trick or two...
Best videos man! you are great! very detailed. helping me learn alot as my friend works at a recycling place im endine up with as mant laptops as i want and have been watching your videos closely! keep it up!
You are so darn pleasant to watch. Always learning something new. Thank you so much for sharing !
Thank you so much!! You are so patience. I really learned a lot, and. I'll trye to do that with mine
Well Dumb !
I Like him " I don't even want to know the problem" "maybe the heat is global warming or the french... " lol. How can U not love this man - "it's fine" . . . "I don't even want to check . . . what can I do" - keep it coming, comrade :)
Hunt4art linearVector 😀
Ugh so glad I found ur channel again I love you ! Your videos help me always oh I'm so thrilled
Wonderful video, thank you very much for posting. I know nothing about laptops and now I can start learning.
You know what you're doing and I respect that. Thanks for the lesson! A+ 🇨🇦
He doesn't know what he's doing because he didn't PROPERLY fix the laptop! I guarantee you that laptop will fail again in a few months of usage and his customer will be looking for another laptop! HE SHOULD HAVE REPLACED THE MOSFET AT THE VERY LEAST!
This man is no different than a BAD AUTO MECHANIC!!!
You could measure the gate voltage after removing the mosfet
Love the videos you give. Helped me a lot with my Lenovo and Samsung products. Have a question how do I get a OnePlus 3t blank screen to revive itself
You are a legend sir. The GOAT of electronic repairs.
Wish you were in cyprus... i have 3 dead laptops
Love your videos, but I must agree that this one seems dodgy. Replace the mosfet with a wire. Why was the mosfet there in the first place? I'm sure the manufacturer deemed it necessary, they would have left it out if they could. Bypassing it has eliminated some capability or feature, likely safety or reliability-related. You called it a fuse, but wasn't it just a fine wire? If it's all about saving time, why not just leave the mosfet in place and bridge it?
It's completely logical and he explained it. What more do you expect if you don't even know what a fuse actually is - "a fine wire". Are you here for some knowledge or to police a video? Like he said, he is not responsible for you, he has his own reasons for doing so. Don't like it? Well, don't do it! :D
Agree, shouldn't remove/jumper parts without knowing result- maybe cost-effective from his point of view?
Don`t even know that that is a fuse wire and want to criticize his video or repair?
Am glad you came around. You are now laptop repair guru
I just find this channel 2,3 days ago. And i am sure that one day i will also repair my dead laptop.. very helpful channel ✌️👌
Cool, at last I finally found this informative channel. Thank you for sharing your knowledge :)
23:14 This is actually a valuable lesson for me, i'm a people-pleaser but that's the type to let everyone down cuz one person got you stuck pleasing them. Balance is key!
Discovered your videos today, nice to meet you Mr. Sorin.
Gooday sir and thank you for all your videos, they are very informative for a amature like me, i want to repair a broken motherboard and i want to try out my self.
I know its gonna be hard to start a learning curve without any study at all but i want to.
Thank you very very much!
Russian, Romanian, Bulgarian? Doesn't matter, very practical thinking! Appreciate your skill and most of all your accent 😃
Edit: Bravo, Sorine! Merge si-asa! Mai da-i in laptele mamii lor pe fitosii care nu-ti apreciaza cunostintele, habar nu au ei ca nevoia ne-nvata!
Thank you sir for this video,I learned to you now my laptop was charging already. Happy new year
I like the way you troubleshoot step by steps I want to learn more from you.
Finally some is fixing other brand besides Apple. Thank you
yea,it so annoying to most repair most repair only apple stuff and not other brand laptops at all.
Nice.. thank you for sharing your knowledge.. by the way my name is Wilfredo catapang from Philippines and i watching your videos... thanks
You are the greatest, just yesterday I did repair my dead laptop! Thank you so much!!!!! 💯
Thank you very much! I did fixed one laptop just by watching your video! Looking forward to learn from you, from a-z :)
Replacing the MOSFET by a shorter (even if it's a fuse) may still be dangerous; not when running on the batter, but when plugging the charger cord when the battery is low: there's a huge spike of current, which can propagate to the rest of the motherboard (nd burining any digital chip behind): that's what the MOSFET is protecting. Thanks the primary mosfet has two output gates, distributing the power as needed for each, and they go to a secondary MOSFET before going to each of the two separate parts after a regulators gernerating the various voltages (most probably one for the CPU/GPU/APU, the second one for the rest i.e. DRAM, bus controlers, display panel, PCI devices; possibly the harddrive and DVD if it uses a motor and there's no SSD, the 2nd secondary MOSFET could be used, but I bet that the panel itself has its own MOSFET an some capacitors to regulate the backlight power when lighting it on., also to avoid excessive current spikes when powefing on, just to initially charge the capacitors..).
It is likely a problem caused by the charger, when plugging it to the PC, or even more likely when its DC output cable was plugged, but its AC input was plugged on the AC 220-240 or 110-120V power outlet, possibly via a bad interrupter; or may be the charger was still positioned for a 110V input, when it was plugged on a 220V-240V outlet.
My opinion is that the charger block may be damaged, I would inspect its internal capacitors and protection devices even if its internal fuse did not fuse: it may have been enough to deliver excessive voltage to a depleted battery, and with the multiplynig effect of the current spike, it could have have increased the dephased current too much inside the charger that then delivered a too high current. Or may be the user of the PC tried with the wrong AC-DC charger block made for another more powerful PC capable of accepting higher input voltages to deliver the power with lower currents and less resistive heat in its cable or on connectors and the motherboard (up to its internal larger battery and its main MOSFET).
Anyway a burnt MOSFET is not the most frequent cause for electronic devices to stop working: in most cases it is caused by capacitors, and you can see that immediately on their top, or becaused they have fused and spread all arounf: the ejected products are very harmful to a motherboard, they destroy the very thin printed layers, if this happens, and don't act quite fast, it will be hard to repair: you need to clean these chemicals that oxydate the printed circuits rapidly, and its very dificult to restore them.
Good electronic devices place capacitors on a protective support that can retain them, you just have to replace the burnt capacitors but no damage on the circuit, unless the capacitors were shortened, in which case the short can allow huge currents to flow in the printed circuits, and burn them all around the motherboard, including on internal layers adn this cannot be repaired at all.
MOSFETS are also there to protect the capacitors on their output: when a MOSFET is defective and burnt, usually there's no damage around, all occurs inside the chip cover, which may just be slightly deformed by the heat.
I would not recommand using thic repaired PC without knowing the cause of the current spike and if it was caused by the charger block, unless it was caused by a misuse on a poor AC outlet, or just accidentally by a storm strike, not completely protected by the home AC installation. Or may be someone used a multiiplug to connect the charger, and another powerful engine was started on the same multiplug block (like a hairdresser, or worse a vacuum cleaner with too high dephasing an insufficient protection to keep the current with low phase difference from the voltage, causing both a high inductive current and voltage spike on the plug).
In general you should always plug the AC power on the AC-DC charger block, before plugging it to a PC via its 19V output chord. The same is true for most flat TV panels, but generally you cannot plug their AC input before powering it on: flat TVs instead use a relay to delay the DC output of their internal PSU for a faction of second., but the protection comes with inductive bobinas and a magnet around on the eng of the power chord, to oppose and reflect incoming spikes before theiy reach the first input MOSFET or capacitors. Good motherboards use many input and output capacitors all around the circuits, and many MOSFETs around voltage regulators. But that's rare for small mobile devices such as your thin notebooks and a tiny motherboard surface: most of the surface is used instead to fit the battery, the heat dissipators the fans and storage disks, or a secondary child board for audio amplifiers and other analog devices like TV antenna input, or the supply for panel backlights.
The other common cause for a PC no longer working is inside harddisks (failing to rotate correctly and generating lot of read/write errors; this is generally caused by shocks when the PC was powered on and disk heads were not parked in slipping position; the head could also have been damaged or could have severaly destroyed several tracks on the rotating magnetic plate).
The but most defects on notebooks are cracked display panels. Other minor but frequent accidents are damaged or missing keycaps.
Keyboard printed plastic layers shortened by sugared liquids are generally unrepairable: they work for a short time, but rapidly they oxydate, and one or several rows of keys are no longer working, or a single keypress will generate sequence of unrelated characters, as if we were constantly presssing multiple keys at once (this occurs as well for desktop keyboards): in that case you need to replace the keyboard (on notebooks, it may be difficult to find the appropriate model that fits correctly, or they are much more expensive; in that case unplug it from the motherboard, and use an external USB keyboard (but it's no longer a mobile notebook...).
Wow, nice comment. I learned a lot
@@leobaldoneto The mosfet is there for a reason constant current supply and protection omitting can potentially have disastrous results in the future for the rest of the M/board.
You make it look so easy, it it’s not. Takes years of experience, and skill.
No it doesn't... It takes what you saw, and how much time and determination for YOU to get there. Read the comments, people watched age learned, simple.
@@cwickwitted spoken like a true board roaster. Maybe for a one off repair sure. To accrue the knowledge and experience to identify components over their years of changes, reliably and efficiently repair near anything thrown at you, indeed takes a very long time of studying and experience.
@@cwickwittedseems like you have a photographic memory. Not everyone can learn each component on a single video. It's like your asking ppl to learn the human anotomy in a few days. Not reality
To be honest, i Reallöhne love what you do, Even morevthevway how you do it. I‘m often quite embarrased and disappointed by sloppy hardware design of manufacturers.They really.dont want anyone to fix their products .You always show them a finger when you find a workaround. Thank you so much for Sharing this.❤
I always admire the "Cost Conscious" techies and mechanics. KUDOS !!
I really loved this one
I am a surgeon. I use operating microscope to to anastomose small vessels and ducts. I am impressed by your use of microscope and peaceful demeanour in approaching the issue at hand. Any work that is done at peace is like a meditation. I recommend this video to anybody who wants to reduce haste from his life. Regards
Thanks to CALIPHATEHACKER he is so intelligent and real and doesn't charge much at all,You can contact him on Instagram...
Andrew you made that up.
Great video...you have insight and skill.. A relaxed way to express your knowledge and the right tools. I’m not an electrical engineer nor technician but you certainly made me laugh and made clear how you can do it and what experienced you are.. keep uploading. Greetings from Holland.. consider Cola as a goodie to unrust metals only...😉
I agree, the hint was on the gate. My thanks for your demonstration.
u are dodgy but also a genius, good job and keep the videos coming, please do more dell laptop repairs esp the dell e6520 and e6540
ce faci Sorin - I love your videos. Question i have is how did you know to jump thos pads , why not the one next to it. I am still learning excuse me if I am askin dumb question .
To isolate the problem on an electric circuit, you check the power sequence by stages. First you have to know how to identify those stages; or we can call them Voltage Regulator Modules (VRMs) on the computer motherboard. So on that MOSFET transistor is where the power ended; not proceeding to the next stage. So or that transistor as a switch has been replaced by a n on state switch (the fuse jumper).
But This is not repairing at all, if you learn electronics like that you'll create self killing bomb. That transistor has to be given an instruction to turn on and off not always on like that.
A 19v bomb. 😂
Many thanks. I had exact HP and had same problem. I took it to a shop here in Cambodia. After 3 days, they told me the motherboard is faulty. And if I pay them $45, they will fix it. After hesitating I agreed though it was a bit expensive. Again, after a few days, they said they are unable to give it life. So I took it back home. While I was contemplating to discard it after removing some parts, I came across your video. I have forwarded it to and requested them if they can do the same. Will update u soon. I wish I had seen u before!!! I can only like u and subscribe.
this video is very helpful to someone trying to revive he's dead unit.. thank you for sharing this video. god speed always .
Hay Sorin we really appreciate everything you teach don't worry about people think this is real life work, not hobby to spend 5 hs when this solution exist! Thank you!
13:53 hahaha "maybe the global warming..." that was nice ;)
I felt that so hard - when I'm at work and someone wants to know why the component I had to replace or repair was fried, or otherwise end-of-life NEEDED repaired - idk, but now it is - and I've got about 10 others I also told I would be there in half an hour so...
I am Victory from Nigeria Africa,Sir may God bless you for the knowledge you are passing on,posterity will never forget you.thank you very much.
Don't waste your time for the people who call you dodgy. You are a great inspiration. Keep up the good work. 👍👍👍👍