About the motherboards .... (part 1)
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- เผยแพร่เมื่อ 17 ส.ค. 2017
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Sorin it is because of videos like this that so many people have great respect for you. Your explainations to us viewers at the beginning of this video was very understandable. We don't just look at you as a great technician, thorough teacher and all around great guy; but one we can trust to tell us the truth. I have never met you but I feel you are one of the most honest men in the world. The stories you tell us have such great wisedom and knowledge that we can't get from anyone else. I really appreciate that you share so much with us. Both professionally and as a friend.
Kenneth you've put in words what so many of us feel here. Its people like Sorin and their generosity that makes life bearable and enjoyable on this planet right? Way to go. Good luck to you.
I recently join this channel..Only to realize there a pple like you Who fill my mind with advanced electronics.. You are super my mn..only geographical distance is the barrier.. GOD BLESS YOU WITH SUCH UNIQUE LESSONS
Dedicated work within the time limit of 4to5 complicated laptop repairing and mobiles and giving information to staff and returning to the teaching video . We all thank for the camera, microscope toggling and power supply, mulitmeter, ammeter on the video corner for the valuable information atonce. You are a great man for the world......seeking 4 electronics...,.thank u.
Thanks to you I was able to bring to life my dead Dell spx labtop . Thanks for sharing you knowledge.
Fantastic videos, great for learning. I have just recently come across your channel and is already one of my favourites.
This is the simplest and best teaching I found on youtube, a great job thanks.
Thank you sir. This was not even told in schools. Simplified explanation.
i live boring life now...and this man has made it exciting again...im hungry for knowledge and kicking myself about all the laptops my family friends and girl have thrown away .
39:18
😂😂😂
How you understood what im thinking..
43:12
Why i choose this motherboard, its old one... 😂😂
Anyways its a very helpfull video for me. And thanks a lot for your effort to enlighten people. Again thank you master.
Keep up the good work....
God bless you.
Out of all of TH-cam videos you are the best I have seen, i have downloaded all your videos , thank you very much for your help, i wish you all the best my teacher.
THESE ARE SO EDUCATIVE so keep 'em coming
I love this man, kudos to you Sorin, appreciate your work mate.
I have felt my brain growing watching this video and googling things I did not understand at the same time. Thank you so much! xd
Sir, first of all i am thanking you for your vedios. i am watching these related field vedios for a long time. but i catch your one recently. ur vedios amazing, , because you teach the real time experience and further more its very clear. i want to add some things here. i noticed when you explain , if you can give some information on the theory part and do the practical part, it will be more use full. i need more vedios on iphone repairing, the basics, and fault finding. very good teacher you are.
That scene when Neo has Kung Fu loaded into his brain - watching this channel does the same thing. You learn electronics Kung Fu on steroids.
Thats a good one. Best thing i like is he says most things in detail like which bios pin, what mark means etc. I would like to know more about ceramic capacitors, how to identify, how to replace and which to use, how to know the pole etc
@@deividaskevisas9823 They have no pole.
Thats a new one to me lol i do that stuff rarely, so i dont know much
Thank you a lot. I watched part 2 before part 1. Awesome.
The best practice I could ever have, from you, many thanks to you, seriously ! ;)
"Where are my mosfets?" should become a shirt.
:)))), i will order one :)
@@electronicsrepairschool Sorin, please can you tell me the name of the black tape at 12:40? I've been looking all over to buy some but i can't find anything because i don't know where to get it nor the name. Thanks.
@@thingshappen9199 Not sure if you're still looking for that, but the closest I was able to find was this: www.amazon.com/gp/product/B01E8W9XEO/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
I've used it on several laptops and they seem to work perfectly. Hope this helps!
Thank you, you are so good. I learn so much. Keep your wonderfull job. We need people like you, the best of the best.
My biggest problem as a learner is getting old motherboards. Everyone wants surprisingly a lot of money for them, even when broken. Like AUD$50 each.
Thank you for sharing your knowledge Sorin! God bless you 🙌
Just perfect! Thank you so much for your explanations! It is very useful as a beginner!
Very educational video, not one on all youtube can even remotely tip on you. i have a degree electronics and learn more in your videos then all the time i sat on the schoolbanks.
I you like and if you find the time could you explane about all the writings on pcb boards and motherboards please there is so much information on there but i have no clue what it means.
Thank you for all the great lessons.
You know what sorin, all your video is really informative.. im learning alot. i just have abit knowledge about electronic.
but all your video make me learn alot of things.. u are best teacher ever.
@@andrew_koala2974
cool. thanks for the reprimand.
Ez nagyon hasznos volt, köszi!
Am doing great because of the knowledge i had from your lessons sir. I can fix charging problems for laptops just by following the 19volts line pass as you just showed us easily. I call today's lesson as GENERAL DIAGNOSE OF ALL POWER SUPPLIES ON A PC MOTHERBOARD. I came across a HP 840 misbehaving i believe the 3.3v power supply on bias is not working ,i will give the feedback on comment. Thanks sir
Thank you for this video sir. I keep on watching again and again just to understand every details of it. I wish i had your talent on how to fix motherboard easily.
Dr. Jack I'm sure your passion and interest will provide you with all the skills necessary and you will be able to troubleshoot like a pro. Sorin is a great inspiration. Good luck to you.
great work sir . and thanks for the video
i always wanted to thank u , love from Egypt.
you are a great teacher keep videos coming A*
Thank you a lot! Your videos are great! I fixed my Lenovo Laptop. Your explanations are the best
thank you so much..I really learned something everyday from your video..stay healthy and more power..I'm excited everyday waiting and watching your video..thanks alot again..
great videos...step by step explanation .thanks
great vids I'll be a patron when back in work
This is golden! Thanks!!
very helpful thank you Sorin
This was really good video! I tryed about 1 year ago to repair asus laptop, which the problem was, that it power light turned on and fan was spinning, but the screen was black. It went horribly wrong when I measured with a little knowhow voltages from various places, there were 19V and 1,8V present. When I measured voltages from resistor network (it was mistake) my test probe shorted 2 pins from resistor and it caused more problems. Now there is shorts across graphig chip's very small capacitors. And also across some other ceramic capacitor.
With this video and others i know now a little bit more about motherboards.
Great, I will keep a eye open for a asus with black screen
Ok! Keep up good work. :)
very nice sir.. thank you for teaching us here in your youtube chanel.
You may know your stuff really well and can relate your knowledge to people who are experienced but not to “newbies”.
That's great. I wouldn't want to be here if it were for newbies. I'm trying to gain deep knowledge about electronic circuits, motherboards and power rails.
There are many newbies electronic channels like linustech where you can find info about basic electronic things.
Thank you for for talking about the differences between shops.
It's hilarious listening to kids who have done 5 computer jobs in their whole life and average 1 per week talking about how repairs should be done. Good luck surviving anywhere other than working for yourself with that sort of flow. Talk to someone when you're handling 25+ jobs a week.
Foarte frumos! mulțumesc!
Thank you so much for all
Respects
actually sir ,the voltage going on the bios chip is called an LDO voltage n is supplied by the pin number 8 of the standby ic (tps51125) n the 5v from pin number 17 before u get the actual 3.3_5v coming from pin 7 n 24 .the LDO is also the voltage u get on the power button .
Thank you Sorin!
Your videos are excellent, thank you.
Your tutorial make me understand more about motherboard, great job sir.
Same as Me........Thanks Alot too
Very informative videos sir.
Thank you
i'm going to have nightmares about not being able to find mosfets after this video. thanks sorin.
thank you so much good job we badly need practice your friendly method is wonderful very vivid ,not like others who give a cold speech like an answering machine i feel like i am besides you in your workplace
Moha Menfis you've said it absolutely well. I completely agree with you. Its what gives Sorin's videos the touch of life. You feel so well connected right?
your the man sir,,,i watching your video i learned a lot of you.keep sharing boss
Great video thank you!
North Ridge Fix finds the board shorts with his diode mode. He just searches the board till he finds no 1/2 volts to ground. When he finds no drop he knows where the short is. He has a thermal camera and he finds where the heat is by putting more and more amps at 1.3v, upon removing that chip, if diode mode finds no short he has the fix.
i am an electrician but i like the way you teach people on your chennal
You are awesome man!!!
THANKS
FOR YOUR VIDEOS
Awesome job .
thank you for your teachings God bless you
thanks Sorin so much!!!
I admire your patience...
Thank you :)
Really true
that NEC low ESR cap under CPU is often faulty after couple of years. MOBO wount start. Hot air test it. Replace it with 4 tantals and 4 ceramics suitable for this power rail.
Thank you, for sharing your knowledge, the video will help me to understand better the process and troubleshooting motherboards.
good information, thank you ...
Lovely video Sir...the way you teach i like that.its awesome.thank you for sharing your experience.
thank you sir a lot, for sharing your knowledge.
great as usual!!
hello KUDOS to you Sir... Ive learned so much... thanks for sharing and teaching us... God Bless You and More Power...😍👏👏✌✌👍👍
great video, not sure I know when your using the multimeter or the voltage probe, would help if you labeled them or mentioned it as you work.
Sorin you need to start using boardview.. In 4 seconds you will find your 3.3v 5v 1.2 or 1.3v
In the boardview is easy the see the network of the ic and just pointing to a pin of the bios ic in you case 3.3v you will see were the 3.3v started and the ramifications.. Now a days is easy to find boardviews of all most all big board producers. Just ask next time I. Got 1tb of schematics and boardviews
You number one fan lol
Please how do I get laptop schematics, I need som please thank you
vinafix.com/
and google is your best way to find.
make services free and paid.
just make some effort and you will find everything
Could you show us how to do it?
Could you show us? how to do it? thanks in advance.
Good approach.tu+sub you make it look easy but that's because you have experience.
You are the best. Greetings from Spain!
thank you very much,dear master,that was perfect
TNX Mr / i learn many from this video
There are 3 section in power supply 19v
1 Adapter V - in supply to 2 fet
19v coming from main fuse which connected with charging section and discharging section .
And Step Down section which providing 3v and 5v .
But from main fuse 19v providing individuals supply as I/O Ic and GMCH, ram section , ICH , and Step Down section.
Would you be the east European Ray Liotta with a soldering iron as a weapon
but i so much like the way u diagone the faults ,is so satisfying
Repairing without schematic you are real pro.
HELLO YOU ARE MY ELECTRONIC LEGEND!!!KEEP IT UP! CAN U TELL ME WHERE IS THE VCC IN THE MOBO?
many thanks, sir.
The beginning of the video was so good, especially explaining the power supply parts.
But later I got lost, I don't know what's going on, and how he can find where's the problem?
guys change the playback speed to 1.25 in video settings... you`ll thank me later
@@mihaivioara I went 1.5x lol thanks
i really like your video's . go on like this :)
greetings from the phillipines... sir.. thanks for the video...
nice lessons repairman i like your way of teaching
Thank you
Thanks for video
love the work you are doing 1 question what tool are you using for the amp/volt/current you use it on mobile charging keep upthe good work
just very nice
Thank you for uploading this video. I wish i could dive deep more into electronics, may i ask where should i start studying. thank you so much.
this lessons is for texnical school bravo.........more bravo......thenks
Very nice video thank you so much !
You are the best!
man i love your vids, btw. thatks for microscope camera. veery useful :))
Thank you for the video, I like the way you're doing these videos dude keep up the great work ;-)
Love it!
good n informative
The samsung board looked like an NP R530. ? I am not sure it matters whether its old or not as it shows people like me how you arrived at solving the problem. Well done.
34:36 These Samsung boards have common problem with big NEC Tokin capacitor under CPU that goes bad, which makes the laptop turn off randomly.
Not only this boards. The same is on most MSI laptops and some of toshiba models.
Me too got a Samsung lap which is NP-R522, i have removed it with 330 capacitors and issue got fixed. It was very difficult for me to remove that boxed capacitors behind the processor.
I dont understand something: Why do the manufacturers sometimes place the first MOSFETS so far away from the charging port? Doesn't it make the whole design of the board more complicated to have to route the power up and down all over the place like that? Wouldn't it make more sense to place the first power distribution point closest to the port? Please correct me if the question is completely invalid.
thank you
Hi'
I need some help and was hoping to get some advice as I can see you are a very experienced professional.
I have a Legion Y520 by Lenovo, it was 3 days ago while playing a game called dying light my laptop suddenly shut off. Since then it is not turning on neither is the charging light turning on when plugging in. What I found checking with a multi meter is that the battery has 11 volts plus left but if I plug it into the board and check at the connector it shows me .02 or 0 volts.
The power connector has the correct voltage which is approximately 20 volts. I have been watching tour videos and wanted to start from the first one with regard to laptop repair. Just above the power input on the board are what look like two mosfet. The first one shows 19 volts on one side but nothing on the other and in beep mode it beeps if I connect the probes to both sides. The mosfet or whatever it is next to this first one is not getting any input and obviously no out put. On connecting power to the board the first one gets burning hot and the second one does too but not as hot as the first one.
These chips do not look like a regular mosfet as i have seen in your videos and looks more like those BGA chips and components. There are no legs like the ones in your video but there are small dots which are on the edges of this component which is where I took the readings from these are both just above the power connector on the board one after the other moving upwards. There are a few capacitors the small aluminium types and they dont show any power at all. Could you help me identify the tracks and components or confirm that the one getting hot is the bad one because by looking at it and its edges I can see the effect of excess heat like the area around it seems like it melted and then got back to normal.
I tried the troubleshooting steps like the static discharge with both power and battery, then each of them individually and even the bios reset.
All I found on the net on Lenovo support was that they changed the motherboard in most cases with one saying he was told it is a motherboard fault and will take almost a month to be sent where it'll be repaired or replaced and sent back, but when he left it with them they called him after 2 days to come and get it as it was fixed. They told him it was a bios issue which is quite strange but I hope you would know whether it is possible to be a bios issue which isnt letting the laptop even power on. How would I be able to flash the bios on a non working board if I want to see if it is the same case as they told this guy which was not letting it start.
It is a really expensive laptop here in India starting at around $1100 and I have the core i7 7700q model with 16 GB of ram, nvidia 1050ti 4gb graphics, a 512 gb name ssd Samsung evo, a 2 tb sshd, and windows ten. I can send you a picture of the board and have the schematic file but it doesnt show the board like I have seen in schematics for other electronic products or gadgets where it is shown the way it is laid out and components are labelled and marked in their respective place on the board.
I look forward to any help I can get and will be grateful if you could tell me where to start watching your tutorial videos from. I just know the basics of electronics I would say bare minimum and have some experience soldering as I made some projects using components and some arduino projects too. But I would appreciate any info I can get as I consider myself a total noob. Thank you for reading this. Regards shantanu