Sorin, above two comments are bots made to scam people. I've tried to report them but you can add filters for your chanel so words like "Flixzone" won't appear.
Did you have to buy any tools? I was trying to fix my laptop but a chip was burned last night due to the broken DC jack. Now I dont know if It is safe to replace the DC jack and to test on the mainboard one more time
@@krystelfreeze4906 try to learn from this channel and do something when you ready. If you just want to fix ones with no tools why these guys don't work with bare hands?
I have no idea if I'm actually learning something or not, but it feels like I know more than when I first started watching this a few months ago! Thanks guy
This guy is brilliant! So honest let’s you see what he does. I have a background in electronics, but fixing laptops is very very different from theory. He goes from problem to solution in the most straight line using his immense experience. I’ve learned so much already!
Im a frustrated technician....way back 1994 i work as a technician.. now after watching u sir, dont even say what i want to say..im speechless...just wanna say thank you sir...from the philippines...
I would like to stay by the side of the LEGEND and absorb directly all this knowledge. Thank you for your time making these videos Mr. Sorin. I would like to have a teacher like you, or work with someone like you.
if i saw well the GPU has 3 phases, removing one mosfet the GPU works in two phases and so also gets feedback from the other two coils, the GPU will work but at full load it will run out of current one phase less current is missing
i think the same. i was under impresion gpu had 4 phases. Sorin simply disconected one phase and laptop will work fine untill gpu ask for more power, then two things will happen, either laptop crashes, or gpu will be limited and throttle back. I had Desktop GPU with burned phase. had to remove both low and hi mosfets, driver and coil. gpu worked fine but showed lower scores on benchmarking.
You should do a video explaining the components and what they do on flight controllers and electronic speed controllers for fpv drones. It's a rising hobby and i love the way you explain things!!
someone with the money should buy thermal camera for this guy as a thank you gift for the service he is giving us for free all those years... from the end of the world|
I am from egypt Good follower since a year Wating for complete labtop repair course from a to z with pen ,paper and schematics followed by some measurements on real motherboards.. I know it'll take long time but you will be the best
My name is Solomon I am a Nigerian I repair computer but I want to understand the mother board of the computer. Thank you very much sir for the classes.
I simply love what you do,though not understand many things relating this,but watching your vids makes me a bit happy.Sadly I got covid and my health prognosis is not good,but all I wanted before I die is to meet you and you teach me repairing laptops...keep the vids coming master Sorrin.
It is the same like in the pc grapics card if you have 4 phases you can run with only 3 only problem is shorter life time of the other 3 phase. I test it on benchmark and it is working normaly but i will put mosfet back because of less stress to other 3 phase. I learn so many things from this channel.
I have a lot of faith in Asus products. I've just replaced an 11 year old motherboard for the only reason that the water cooling system had a leak and killed it. Rock solid products.
Sir please make a full video about shorting on circuits on the laptop repair section to explain because a very well experienced person like you teaching methods is different from others really awesome
hello sir, i think that laptop has dual graphics, removing that dual mosfet for graphics power supply disabled the graphic chip (nvidia/radeon) and the laptop automatically switch to intel display , that’s why the laptop has still display you may check it on bios setup or device manager ..as always you are my first laptop motherboard repair teacher,im forever grateful 😍😇🙏🏽☝🏽💻
Sorin, you don’t have to replace the mosfet on modern Multiphase converter it can detect and not use the Missing rail, it will work but it is not ideal for law phase count or high power draw. Buildzoid from Hardcore overclocking channel always does this.
31:12 time very good ... can you explain better? When you measure the resistance to plus ? And not to minus ? You said that is hight side mosfet shorted .... because that... thanks...
well done asus. great design ( as said on the video). i own 3 asus products, my zenfone 6 had faulty mic jack and a scratch on a new screen. i'm happy they took responsibility and repaired everything for no cost.i love the new asus rog zephyrus model with keyboard pulled back.
I've seen your first video last year November and I was like wow this guy is demn supper good with fixing laptops, on march this year I came across the video were u were advising on opening a repair shop , and I liked the words u said "just do it" I've managed to buy most of the tools now , I'm still learning from u all the way to Swaziland
Wow don't think I understood most of what you said I'm still basic but have learned so much from you and in time I will understand this to thank you ☺️
From stabbing many GPU input inductors in my repair attempts and sanity checks with known-good cards, 0.8Ω is normal for the GPU Vcore resistance. 1.2Ω (older cards) to 0.6Ω is typical, depending on the GPU.
I am an electronics technician with a 2-year associates degree in electronics technology with over 25 years experience in both board and component level. I live in the State Of Maine, U.S.A. If a tech is in business to repair computers in this case to component level, it is always a great idea to have a good stock of components, and Mouser Electronics LLC is an international distributor, and possibly Digikey in Thief River Falls, Minnesota. Use ESD protection such as Faraday Shields, and a grounded bench mat, and a grounded wrist strap, since as little as 12 Volts of static electricity can damage permanently components! Follow my good advice, and you always will get great results!
Thank You so much Sorin i've learned a lot from your video its more than a year since ive subscribed to your channel and so far I have improve on laptop repair skill. Thats why im so grateful to come across your chanel been watching all your videos almost everyday, I even save it on my harddrive for my references :) Thanks so much more power to You and Your Channel. God bless.. keep on sharing ... its me Erick from Philippines
Hello Sorin! Because you removed that dual MOSFET you cancel one of the 4 GPU power phases. So either the super io regognise that and work that GPU with only 3 phases meaning that maybe laptop cannot overclock that GPU or push it to the limits. OR laptop will crash when some heavy application (like games) force that GPU to work under full load and needs all 4 phases.
Mr. Sorin, what you take out from the apple board is not a dual mosfet it is a mosfet with shotky diot inside. Dont trow it away it is a quite expensive part 😁
Thank you for this video Sorin. It is very educative, especially because of the example where power management chip via current sensing input resistor did not see short and thus shut down input Mosfets. In this case resistance was high enough not to trigger input Mosfet but internal protection in the charger kicked in.
My Zephyrus hasn't turned on again for 7 months now after changing to discrete graphics. Do you think it's has to do with that setting? I took it to 3 techshops to fix and none of them could.
I hate the fact that I feel like I am not learning things, I am trying to understand what is short circuited on a motherbord but when I seen the schematics of the motherboard, it dont show dcin1 it only shows pwrcn1, and pwrcn1 is on thd motherboard, the issue is pwrcn1 connection is on the motherboard, a separate bored to where the dc jack is, basically the board has a dc jack and a USB jack with a few microchips on it, then there is a connection, then a wire that goes from that connection to the pwrcn1 connection what is on the motherboard. (Lonvo G580 2689 - Wistron LG4858 uma mb 11291-1 48.4SG15.011) So It is hard to test the voltage and continuity if i can't find the start of the dc jack connection.
It looks like the short could have been caused by whatever was on the board and not the component. Maybe the FET is still good. That kind of looks like a splash of solder.
Thank you Sorin so much for one more lesson.its amazing.i like the way you present the lesson to all the students in your class. Iam a beginner and iam requesting ,if you can do a video for how to inject amps with power supply to find a sort circuit or faulty component. Thanks.. Greetings from New Guinea.
Great Work! I request you to make a video on how we can diagnose the problem in motherboard with the help of voltage fluctuation in multimeter. For instance if there is short on power supply of 3v section how we will come to know on multimeter or for instance if there is short circuit on 5v section then how we can come to know on Multimeter. Thank you
Thanks so much Sorin. I had one HP spectre 430 G5 in my repair shop last month, which the 19V rail 1st Mosfet got short (FDMC 4435BZ) after replacing the P channel FET one V-Core chip was getting hot. The computer now turns up but no display. the chip could not be found online.
@Sorin, I know it is 3 months later watching this video, but it was interesting. The MOSFET you are missing is very unusual. Leave it to Fairchild, the company of brainiac engineers who were the foundation of Silicon Valley, and started the semiconductor revolution. Looking at the data sheet, the same time you were looking it up, it is a 10 pin MOSFET. YES 10 pins( before we get into semantics, it is actually 10 contact points). Pin 9 (GND), and The High Side Drain HSD, Pin 10 are on the bottom side of the chip! The HSD is also connected to Pins 3 and 4.
Make sure you put back the screws in the right places!!! They have 2 different lengths. If you missplace it, a dent appears on the front of the laptop. The owner already did this once, you can see a small bump just below the trackpad. As a second comment, could it be working because the laptop is using the integrated GPU and didn't need the discrete GPU yet? Anyways, nice find of the culprit and a very good diagnosing lesson! Thank you.
Wow I actually had the same high-side MOSFET fault like this one but didn't know for sure, but that's on the 3.3V and the SuperIO is sitting right beside it! By the time I get to test this the SuperIO is already gone (getting mad hot)... And the SuperIO has the BIOS on it so it's a goner... But in my case it's water damage and not whether the quality of the laptop is bad
Love your videos and thanks for teaching. Often you reach a conclusion without explaining how you worked it out. So when there was no voltage at the charging port how did you know the charging port wasn't the problem and hence to check for motherboard short? How did you know the charger wasn't bad when there was no voltage on the charger?
Am an apprentice but I stopped going to the shop because of your nice lessons and am doing a lot on my own now. Thanks so much sir. One thing I don't understand and I wish to get help in is how you identify and disconnect certain parts of TV boards and it still works. How can I know how to disconnect this parts how do I follow the links to know?
I fixed my very first motherboard using your lessons, you made me so proud of myself! Thank Sorin for all you do for us!
Living the dream dude! Congrats.
Sorin, above two comments are bots made to scam people. I've tried to report them but you can add filters for your chanel so words like "Flixzone" won't appear.
Did you have to buy any tools? I was trying to fix my laptop but a chip was burned last night due to the broken DC jack. Now I dont know if It is safe to replace the DC jack and to test on the mainboard one more time
@@krystelfreeze4906 try to learn from this channel and do something when you ready. If you just want to fix ones with no tools why these guys don't work with bare hands?
Same for me
I have no idea if I'm actually learning something or not, but it feels like I know more than when I first started watching this a few months ago! Thanks guy
This guy is brilliant! So honest let’s you see what he does. I have a background in electronics, but fixing laptops is very very different from theory. He goes from problem to solution in the most straight line using his immense experience. I’ve learned so much already!
Great to see you again Mr.Sorin love from Romania!
The legend is back again :)
IVE BEEN I REPAIR TECH FOR 27 YRS. IVE LEARNED MORE FROM YOU. THEN I DID IN MY FIRST 3 WEEKS IN SCHOOL. YOUR AWESOME.!!!
Im a frustrated technician....way back 1994 i work as a technician.. now after watching u sir, dont even say what i want to say..im speechless...just wanna say thank you sir...from the philippines...
As a DIY myself, this is one of my go to channel every time I had problem with my home repairs. Good work sir.
So happy that you are back. I am watching your video's for couple weeks and yesterday I repaired my first dead laptop. Thank you so much!
nice to hear from you again mr. sorin
One of your student from Nigeria, I'm inspired with all your lesson thank you sir.
I would like to stay by the side of the LEGEND and absorb directly all this knowledge. Thank you for your time making these videos Mr. Sorin. I would like to have a teacher like you, or work with someone like you.
if i saw well the GPU has 3 phases, removing one mosfet the GPU works in two phases and so also gets feedback from the other two coils, the GPU will work but at full load it will run out of current one phase less current is missing
I thought the very same thing and was about to ask on discord server and saw your comment.
i think the same.
i was under impresion gpu had 4 phases.
Sorin simply disconected one phase and laptop will work fine untill gpu ask for more power, then two things will happen, either laptop crashes, or gpu will be limited and throttle back.
I had Desktop GPU with burned phase. had to remove both low and hi mosfets, driver and coil. gpu worked fine but showed lower scores on benchmarking.
@@Dmiliunas I'm glad you have the same opinion and knowledge
Greetings from Slovenia
@@neutrinowave it's electronics
1h of skill and good vibes 😎 greetings from Germany
You should do a video explaining the components and what they do on flight controllers and electronic speed controllers for fpv drones. It's a rising hobby and i love the way you explain things!!
I am glad to see you again Mr. Sorin, greetings from Bulgaria.
You're great.
Saw the repair sticker and found this repair shop is literally so close to where I live! That is amazing!
Where is it?
27:52 Sits back, says "this is a nice laptop", and smoke a Bob... I like this guy
someone with the money should buy thermal camera for this guy as a thank you gift for the service he is giving us for free all those years...
from the end of the world|
nice to see u again >> miss u BOSS
I am from egypt
Good follower since a year
Wating for complete labtop repair course from a to z with pen ,paper and schematics followed by some measurements on real motherboards..
I know it'll take long time but you will be the best
You are a master
I like the way how you share everything without hiding the information instead of selling it
Thank you
My name is Solomon I am a Nigerian I repair computer but I want to understand the mother board of the computer.
Thank you very much sir for the classes.
I simply love what you do,though not understand many things relating this,but watching your vids makes me a bit happy.Sadly I got covid and my health prognosis is not good,but all I wanted before I die is to meet you and you teach me repairing laptops...keep the vids coming master Sorrin.
You ain't gonna die please...
That's too negative to say..
Where are you from ? Hope you don't mind chatting me up?
Hey how are you doing, buddy?
u good?
Did you die?
It is the same like in the pc grapics card if you have 4 phases you can run with only 3 only problem is shorter life time of the other 3 phase. I test it on benchmark and it is working normaly but i will put mosfet back because of less stress to other 3 phase. I learn so many things from this channel.
you make an hour long video feel like a ten min video great content learned a lot :D
I was watching old videos from you again as am entering the try to fix ground as hobby. Love to see you back
Thank you and welcome back Mr Sorin, watching from Davao city Phillipines. Stay safe.
Excellent, second video i watch from your channel, u will have a subscriber from Colombia living in Bolivia Country, thanks!
you are really the best teacher
I have a lot of faith in Asus products. I've just replaced an 11 year old motherboard for the only reason that the water cooling system had a leak and killed it. Rock solid products.
Sir please make a full video about shorting on circuits on the laptop repair section to explain because a very well experienced person like you teaching methods is different from others really awesome
Our teacher and instructor is back, welcome sir,
sorin you are a great man and teacher keep it up. thank you from philippines.
Grazie.
hello sir, i think that laptop has dual graphics, removing that dual mosfet for graphics power supply disabled the graphic chip (nvidia/radeon) and the laptop automatically switch to intel display , that’s why the laptop has still display you may check it on bios setup or device manager ..as always you are my first laptop motherboard repair teacher,im forever grateful 😍😇🙏🏽☝🏽💻
Sorin, you don’t have to replace the mosfet on modern Multiphase converter it can detect and not use the Missing rail, it will work but it is not ideal for law phase count or high power draw. Buildzoid from Hardcore overclocking channel always does this.
Good to see you back Sorin!
Your a generous man and a great teacher, thank you
31:12 time very good ... can you explain better? When you measure the resistance to plus ? And not to minus ? You said that is hight side mosfet shorted .... because that... thanks...
@glyn hodges thanks
well done asus. great design ( as said on the video). i own 3 asus products, my zenfone 6 had faulty mic jack and a scratch on a new screen. i'm happy they took responsibility and repaired everything for no cost.i love the new asus rog zephyrus model with keyboard pulled back.
This is going on to my saved videos.
This one was a pretty good lesson Sorin
I've seen your first video last year November and I was like wow this guy is demn supper good with fixing laptops, on march this year I came across the video were u were advising on opening a repair shop , and I liked the words u said "just do it" I've managed to buy most of the tools now , I'm still learning from u all the way to Swaziland
looking forward to buying some tools as well bro
You always remove chips and components so quickly and with precision !
Nice repairing chanel and you're my best youtuber 👍
The great Sorin is back!
Wow don't think I understood most of what you said I'm still basic but have learned so much from you and in time I will understand this to thank you ☺️
Thanks so much mr Sorin
Always a pleasure watching your brain at work
Greetings from Poland 🇵🇱🙂
Great job and thx a lot, very calm and relaxing explanation on many things..love from Bosnia and Herzegowina
From stabbing many GPU input inductors in my repair attempts and sanity checks with known-good cards, 0.8Ω is normal for the GPU Vcore resistance. 1.2Ω (older cards) to 0.6Ω is typical, depending on the GPU.
I am an electronics technician with a 2-year associates degree in electronics technology with over 25 years experience in both board and component level. I live in the State Of Maine, U.S.A. If a tech is in business to repair computers in this case to component level, it is always a great idea to have a good stock of components, and Mouser Electronics LLC is an international distributor, and possibly Digikey in Thief River Falls, Minnesota. Use ESD protection such as Faraday Shields, and a grounded bench mat, and a grounded wrist strap, since as little as 12 Volts of static electricity can damage permanently components! Follow my good advice, and you always will get great results!
unbelieveble patiance and dedication. Good job
Pure black magic, Sorin removes a component the laptop works, it knows its master. G
I didnt notice i spent an hour on this video lol. Very informative
Thank You so much Sorin i've learned a lot from your video its more than a year since ive subscribed to your channel and so far I have improve on laptop repair skill. Thats why im so grateful to come across your chanel been watching all your videos almost everyday, I even save it on my harddrive for my references :) Thanks so much more power to You and Your Channel. God bless.. keep on sharing ... its me Erick from Philippines
I always learn something new everytime I listen to you. Thanks
Thanks Sorin for all you do for us, god bless you, keep you healthy and away from harm
Hello Sorin! Because you removed that dual MOSFET you cancel one of the 4 GPU power phases. So either the super io regognise that and work that GPU with only 3 phases meaning that maybe laptop cannot overclock that GPU or push it to the limits. OR laptop will crash when some heavy application (like games) force that GPU to work under full load and needs all 4 phases.
Usually I use 3.3v as a voltage for current injection ( if the cap burns.. no way to fry something with a 19v voltage )
Best wishes from Bulgaria!
Thank you for being a good teacher!🙏😘
This guy has magic in his hands. 👌👌👍
Hi from Greece ! Thanks for videos!
Mr. Sorin, what you take out from the apple board is not a dual mosfet it is a mosfet with shotky diot inside. Dont trow it away it is a quite expensive part 😁
We use this low side mosfets always as a diode.. check buck converters
Thank you for this video Sorin. It is very educative, especially because of the example where power management chip via current sensing input resistor did not see short and thus shut down input Mosfets. In this case resistance was high enough not to trigger input Mosfet but internal protection in the charger kicked in.
Good video!But i think here is a switching graphics and now the discrete is not working ,only that in cpu.
My Zephyrus hasn't turned on again for 7 months now after changing to discrete graphics. Do you think it's has to do with that setting? I took it to 3 techshops to fix and none of them could.
You sure it is automaticaly can turn discrete to UMA ? I know the only way to change it with hand operation, changin some parts
Thanks for posting despite the curveball at the end there haha. It was interesting and informative, regardless. Good seeing ya again.
Very nice and informative .. your videos are very much educational for us ... Thanks for educating us.. God bless you
I hate the fact that I feel like I am not learning things, I am trying to understand what is short circuited on a motherbord but when I seen the schematics of the motherboard, it dont show dcin1 it only shows pwrcn1, and pwrcn1 is on thd motherboard, the issue is pwrcn1 connection is on the motherboard, a separate bored to where the dc jack is, basically the board has a dc jack and a USB jack with a few microchips on it, then there is a connection, then a wire that goes from that connection to the pwrcn1 connection what is on the motherboard.
(Lonvo G580 2689 - Wistron LG4858 uma mb 11291-1 48.4SG15.011)
So It is hard to test the voltage and continuity if i can't find the start of the dc jack connection.
You're a great person Mr. Sorin I learned a lot to you. Thanks a lot. Godbless you always.
It looks like the short could have been caused by whatever was on the board and not the component. Maybe the FET is still good. That kind of looks like a splash of solder.
This is a very important lesson Mr Sorin thank you
Best repair Chanel good luck master
It is nice how you explain things and troubleshooting!
Maybe feedback is for balancing load on all mosfets. If one is missing power management chip rises load on other mosfets
Element14 have plenty in stock in the UK
9:59 You had some sparks going on there. Lol. Still have the battery plugged in.
When i see Sorin's video first i like then i watch...
welcome back Sorin , again great vid like alway`s
Thank you Sorin so much for one more lesson.its amazing.i like the way you present the lesson to all the students in your class.
Iam a beginner and iam requesting ,if you can do a video for how to inject amps with power supply to find a sort circuit or faulty component.
Thanks..
Greetings from New Guinea.
Nice to see you again Engr ....we hope you are okay.
always cool mr.sorin , when you host your show ..love it
Greetings from Poland👍
Good to see You Sorin !
The best electronic teacher
Great Work! I request you to make a video on how we can diagnose the problem in motherboard with the help of voltage fluctuation in multimeter. For instance if there is short on power supply of 3v section how we will come to know on multimeter or for instance if there is short circuit on 5v section then how we can come to know on Multimeter. Thank you
Thanks so much Sorin.
I had one HP spectre 430 G5 in my repair shop last month, which the 19V rail 1st Mosfet got short (FDMC 4435BZ) after replacing the P channel FET one V-Core chip was getting hot. The computer now turns up but no display. the chip could not be found online.
@Sorin, I know it is 3 months later watching this video, but it was interesting. The MOSFET you are missing is very unusual. Leave it to Fairchild, the company of brainiac engineers who were the foundation of Silicon Valley, and started the semiconductor revolution. Looking at the data sheet, the same time you were looking it up, it is a 10 pin MOSFET. YES 10 pins( before we get into semantics, it is actually 10 contact points). Pin 9 (GND), and The High Side Drain HSD, Pin 10 are on the bottom side of the chip! The HSD is also connected to Pins 3 and 4.
From Kenya,great video
Make sure you put back the screws in the right places!!! They have 2 different lengths. If you missplace it, a dent appears on the front of the laptop. The owner already did this once, you can see a small bump just below the trackpad. As a second comment, could it be working because the laptop is using the integrated GPU and didn't need the discrete GPU yet? Anyways, nice find of the culprit and a very good diagnosing lesson! Thank you.
Wow I actually had the same high-side MOSFET fault like this one but didn't know for sure, but that's on the 3.3V and the SuperIO is sitting right beside it! By the time I get to test this the SuperIO is already gone (getting mad hot)... And the SuperIO has the BIOS on it so it's a goner... But in my case it's water damage and not whether the quality of the laptop is bad
Very nice explanation of power bus . Thanks :)
How will you find the problem if you will not see the flux around the bad mosfet? If it looks good? 🙂
Injecting voltage very easy
yes but hot gets graphics not the dual mosfet
Love your videos and thanks for teaching. Often you reach a conclusion without explaining how you worked it out. So when there was no voltage at the charging port how did you know the charging port wasn't the problem and hence to check for motherboard short? How did you know the charger wasn't bad when there was no voltage on the charger?
Am an apprentice but I stopped going to the shop because of your nice lessons and am doing a lot on my own now. Thanks so much sir.
One thing I don't understand and I wish to get help in is how you identify and disconnect certain parts of TV boards and it still works. How can I know how to disconnect this parts how do I follow the links to know?
Why don't you buy the chip from mouser, farnell o digikey?
Excellent, as always. Thanks for the video and knowledge...
Hy Sorin! it would be great if the "shop workflow" series continued.
Hello hello master! Good. To see you again.