Advanced Motherboard Diagnose and Repair Technique, Hp 15-n031sa
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- เผยแพร่เมื่อ 21 พ.ย. 2017
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Good evening. I'm mozambican from Nampula province. I wish to congratulate you from your patiente in teaching me and other more. Since I knew you from TH-cam I just said: god bless this man and forever. Remember that you have a great student beside.
pretty amazing repair. Absolutely did not expect the ram to be running with that short !
I think that Sorin is one of that rare people who know whats important in life.
You are the best teacher in the world!!! Thank you very much!!! thanks to you I was able to fix a board that was shorted due to having dropped liquid in it.
Yes ! we are having fun. lol Great video many thanks , enjoy this stuff. Tomorrow I will be 72 and at it for over 60 yrs.
Wow, respect sir!
Sir. You are The Grate Engineer.
Thanks man, I'm a qualified engineer, Motherboard major faults isn't my best skill. You explain procceses bettter than anyone Iv'e been tough by!!
There! The dreaded dual MOSFETs! Badass component. Great trace and fix as always. Kudos.
i love the way you explain, so simple. Thank you.
fun watching you work!
I dont even mind the ads anymore. Support:)
Great Video Sorin, very informative
Masterpiece of thinking and work!
Thank you for all
You are the best
it's like a quest... from video to video... i find new information with advancing in diagnose problem. Thank you.
dude i love your work you are my idol especially the laptop motherboards. love from the Philippines!
Impresive! so fast fixing stuff.
I learn new thing, informative video, thanks a lot.
Reviewed this vid today again. Sorin you an expert in the doctorage level. Thanks for your tutoring!
I'm watching you from Türkiye. I like it. thanks a lot.
Another good informative video thanks sorin.
I understand what you say. What a great job. You are a master in electronics, I'm learning so much with you. Thank you
always you are the best , thanks for your explain
YOUR VIDEOS ARE VERY FINE. YOU HELP ME TOO MUCH
From Colombia,...I´m thanksfull,....the videos are excelents to learn Electronic,......GOD BLESS YOU
Writing with both hands impressive keep up the great tutorials
very best..level best. sir you always won my heart. i eager to watch vedios. pls more on laptop mother board diagnosting techniques.pls
Sir you are great!You are the electronics genious.Hoping for the videos tricky cases like this.Your explanation is logical.You are the great teacher too.Thank you so much.
Again a nice video. Very nice to see how u debug a fault.
ur oscilloscope is a good one u purchased.. wants to see u work on that also show different usage techniques.
Your videos are the best i ever saw and i'll watch all of them.ician, i fix things every days and you are the best i ever saw. You help me so much. Big thank you. So learning and interesting. It's always a pleasure to learn from you.
it is fun and im so impressed in watching every video you have master :D i gain some knowledge thank you for your videos im newbie in laptop repairing.. hoping someday i can be good as you sir..🕵😉 keep it up💗👍👍👍
Hello. Great video i can't believe the ram can take double power input and still working. Amazing :) you are werry smart and cool man :)
amazing work as always, these tips will be useful for any future repair
very nice. good job
Hello sir
Thanks for the informative video. You are doing great job. Hats off 🎩
Great Video. Thanks you.
Thank you, that was fantastic! Learned a lot.
my favorite teacher . i am following your lead daily .i love you techniques
Great video and I really like your logic. Thanks.
all good stuff, thanks ...
Very nice Sorin, good job!!!!
What an amazing and useful video.Thanks a lot
As usual...2nd comment by me....I am really very very much impressed by your way of working and finding faults. No doubt you are expert among all of us.
Very nice. Difficult case but for another time seems easy in your hands
Very nice and interesting job!!
Great Video Sorin
Nice video. By the way, the new dual mosfet position can be easily found by the white spot next to the pin on the mb and the hole in the corner of the mosfet. You don`t have to check continuity on the mosfet pins.
thank you so much , i like your videos
💯 goood video sorin keep on
Nice work
شكرا لك على مجهوداتك
I have two laptops that need a eternal fan to cool. but the short on memory, I experienced today. An ACER Aspire tower, There was a module vibrating. It was not snapped in so I engaged the spring clip and started beeping I change the card out and that was it. Thank you for the "professional E-School"... RJ
I can't stop to watch your video even more if it was too long,I think because you really fascinated about what you do!
Good job sir
Good work you are teacher
Thank you so much,i like your videos
Unbelievable sir but this is right way repair of laptop motherboard.
its important video thank you
Master class. After sitting through years of equations and graphs, I still don’t have a clue of how to diagnose a laptop fault. Those teachers needs to be rounded up and locked up.
most people who study electronics dont really know much...its this hands on experience that really pulls it all together..not oscilloscopes and theory. and calculations.(maybe for circuit designer)
I had the same experience. Finished my 4 year degree in EE, but came away with nothing practical... just lots of math and theory, no way to put it into practice! Sure, we built some LED arrays, did some LabView data acquisition projects, and got to play with lego mindstorms robots. Yet, I have no idea how to design a circuit or product from the ground up, much less diagnose or repair anything complicated.
The closed-source IP & proprietary nature of these things is causing so many problems. Students come out with a university degree but no hope in paying off student debt unless they get lucky and find a job where senior level designers will act as mentor. Too much barrier to entry, and generational inequality on top of that! Not to mention the whole planned obsolescence & secretive IP model is also creating massive e-waste problems. Let's hope the right to repair movement is successful! Most of the electronics field is still way behind when it comes to Open Source & DIY learning resources.
Kudos to you sir, so amazing. I have an issue with my client's hp 15ac007nia charging but not powering, when power switch is pressed, the power LED comes up and off in 2sec, is there any assistance I can get from you please sir?
Just got the same with Intel N2840 without a fan (as it is a small underpowered procesor) but as soon as it gets into Windows it will shut down completely. Sometimes keyboard is not working and blinking caps lock. Tried updating BIOS and replacing RAM and CMOS but seems to be the power supply of the processor or the CPU itself. How to diagnose that since it starts up normally! Thank you Mr Sorin for your videos!
from Jakarta, thx master
Great detective work you did there!
Salut . Mi se pare impresionant faptul ca poți scrie/desena cu ambele mâini.....👍🏻
Keep it up sir
For me it will be very interesting to tell as about your first days of work. How was with the first repairs and stuff. So on some of the next videos you can add a little story. :) Great video, as usual. Regards Yanko
Thank you
To see what part is getting hot an easy way may be to use an infrared camera. There are some on ebay that you can easily add to your cell phone and they are not that expensive. Great videos thanks
World best number one engineer
When you forgot the orientation. So did I when i was sitting watching and learning how to troubleshoot.
But then I noticed on the motherboard it had a dot to show the orientation of the duel mosfet. Or atleast thats what I think it meant. Some have arrow showing orientation. But I dont know if all boards mark like this. So good Idea to know without counting on a mark.
thank you sir
Last night I had a Lenovo B50-70. It powered up and shut down for few seconds.
Thanks for your diagnostic method I can check the key things!
The 19V power rail was ok. On the memory power supply I measured 1,38V.
After a few power up the memory got warm. The sticker on the memory module is burned a bit.
I replaced the memory module to an other one and the laptop works fine. Weird
Can the memory module go to short?
Can somebody explain to me how these MOSFET power supply work exactly? What does the coil/inductor do? Does the driver to PWM to regulate the output voltage of the MOSFET? Why we need a second MOSFET? I tried to find out myself but all examples I could are much more complex.
That double mosfet that you replaced was a different as I recall and it still worked - I thought it had to be same exact letter/# combination - learned something new there
after all it is just a switch ... most of these mosfets are rated at 30v 20a ... and they switch on at around 2 to 3v ..... so should be ok
many , many thanks, sir.
Thank you very much
Thanks sir yr videos are very important to me.
I have that very kind of mother but with mine,the short is wt the capacitors close to the processor,
Pls help me out on what to do.
Impressive how you can write with both hands
nice video sir
Best best best teacher
Thank you
love these videos still hoping to find problem in a ibm board that i have laying arroun but that seems to be also hard... light works, but when pressing the button the laptop do nothing and power light goes off... so must be a 3v problem? but i found no weird things in that path.
Master Sorin!!!
Good job sir . In indonesia it called "rosok"
Nice job! Couldn't you make one bridge? for the one that was in short circuit? just saying?
Good Video. so if current sense loop tells the power control chip there is too much current it would cut the 1.5v reference voltage to the gate. and then retry. the 3 volts comes from the cap and the coil being charged and cut. similar to a voltage doubler circuit. even with the short the power control chip avoids damaging other components.
everything its cuted down already there by the second mosfet based on the current sensor which is next to the second mosfet. 1.5v power rail is joined/shorted with 19v power rail. We have 3v on the memory because i limited the current from my lab power supply
You are the best
nice video sorin , what power supply are u using please thank you in advance
Love you sir
Freezing spray haha. Thought you normally use petrol ;)
Maestro , hagase un video de las que no anduvieron así no nos frustramos de entrada!
Master good morning
I dont have a power supply so i took a toshiba charger 19V-4.74A and connected the + and - to digital multimeter wires. This way i can see when the voltage drops.
Am i right? Can i use this as a power supply?
And your videos are very good. I am learning a lot. Thanks!
is it necessary to match all the parameters of substitute MOSFET with the defective one while replacing ?
waow i really like this video well done sir, please i have issue with my Dell Inspiron 15 (3000 series) not turn on and not charging pls help but one of the mosfet is very hot on the motherboard thanks
Sir thank you for making a good video like this I would like to ask using a power supply you are checking and apply the voltage how this logic isn't applying could you please make a video on how to use that power supply if possible request thank you sorin sir
Very nice videos. Why you not using termal camera? Cat s60 maybe?? Or this not good?
this is the best gut i have found to teach mr what i need to know BUT i need it to de more on what i type like ihave new motherboaed for my hp pavilion 17-g113bx power lites on but all of usuden pc won,t power up why?????
you are amazing
I think I started watching your videos on November 2020 and now i already fixed 5 laptops, i also encountered dual Mosfet of HP laptop unfortunately i don't have that dual Mosfet. I almost do the modified but I'm a bit scared as of now and the laptop is expensive i don't want to make mistakes and damage more components. By the way on hp laptop the dual Mosfet dead is the 3.3v
Awesome stuff. Never a dull moment. Good Learning!! ps. Love how you have NO SPACEBAR on your keyboard. Wore that out!? :) 12 Dollar replacement from Laptopkey.com. But ACK! Just like a mechanics car that doesnt run. lol Keep up the good work!
just great :o :o