5:12 warning for others: please do not inject 19v on the main power rail for fun, when normally that voltage is missing. You can be lucky, or you can inject 19V straight to cpu/gpu/chipset IF any of the mosfets or PWM controllers are partial damaged or not working properly. Always there is a reason when the motherboard cut down the main high voltage. Sorin started... with correct voltage - he injected 0.9V on the beginning to the main rail, and he discovered that there is no short, so he assumed that it is safe now to inject 19V. I agree with him, but he didn't told you about the warning, that if you want to inject 19V, you have to start from 0.9 in the first place, which is typical cpu/gpu voltage.

I work in IT but I'm a total noob in electronics. I just like watching your repairs cause it feels like magic to me. Also, you have a very enjoyable personality and explain what you do well. I think in this day and time, you're doing god's work by not only repairing stuff, but also showing everyone how to do the same. Kudos and much respect to you sir.

Amazing! If he hadn't taken time to explain, it'd take him 2 minutes start to finish. Have to say, Sorin you have a gift: Teaching difficult to grasp topics in a manner others can fully comprehend. Very few and also the very best university professors share this quality. (Most practice linguistic ambiguity. ) College kids: Sorin is an excellent standard to hold professors to. Before "add/drop week," professors who haven't made you understand concepts well the first week, a) can't & b) don't improve and c) waste your semester.) I feel blessed to be able to learn from you Sorin.

Halo Mr Sorin. A very warm thank you from South Africa. I just fixe a Toshiba Satellite c850 with you help. Its probably same model laptop as this video of yours. And the same solution too. Thank you sir for giving me courage. I will post my successful repair on KZfaq very soon. One more time Sorin thank you very much to share your knowledge to us.

He is the one best ever guru presented on KZfaq. Naturally skilled! I learned a lot from him! Thank you Sorin!

I want to thank PCBWay for sponsoring this channel. Sorin is one of the best at repairing laptops. Thank you very much on behalf of the community.

Nice. Along with other diagnosis and repair videos it shows how nice and simple things can be. I just need 1) the tools to deal with SMDs, 2) the eyesight to see that small properly, 3) the time to devote to dismantling, fixing and rebuilding, 4) the space to store all the tiny screws so that I can find them again when I can't meet the criteria for point 3), and 5) the courage to do it.

after i watched more than 100 your videos, finally i took a step to repair my own Laptop, and finally lucky me, found a shorted capacitor.. thank you very much for all lessons you gave to us Sorin, Salute From 🇲🇨INDONESIA🇲🇨

Although I have not the faintest idea about electrics I love watching your work. Hope you can explain sometimes a little bit for us non-schooled watchers.

Not my cup of tea but it was so informative and well narrated. Well done my friend. Keep the videos coming.

Thank you for sharing all your knowledge with us. You are such a great teacher and explain things really well.

An absolute brilliant diagnosis!

Спасибо! Не ремонтирую ноутбуки, но за ваш труд и открытость - огромное спасибо! Хороших вам клиентов и интересных работ

Resetting bios password for these Toshibas is super easy. There's two pins next to the CMOS battery that you need to short and it's done.

He lastly told the reason and true story. Good, many people wouldn't tell this. I am totally not a computer repairing guy, just an electronic engineer. Lately, l need to repair my failed old laptops. Luckily, l can find those motherboard schematics on the web. By tracing the problem, a failed mosfet on power rail area found, it was caused by a failed capacitor that shorting power rail to ground. Today, I see this video

Bravo !!! Salutari din Chicago !!! Super lectie. I had a friend of mine having the same exact problem and was a Toshiba too. You are the best !!!

Thank you for your easy and detailed way of teaching new students to have their way to be computer tech fans including me .

nice job thanks really blessed by your lessons greetings from Nigeria ❤❤

My first time actually understanding how to trace power fault in 5 years + thanks a lot for this video sir

Nice teaching experience thanks Sorin 😊

Outstanding as usual. 😊

Awesome !! No isopropílic alcohol bloodbath , no flux bucakke. Perfection ...

GR8 JOB. Congratulations!

Thank you Sir for your time on this video. Helped me a lot.....Cheers!!

As always I have learned something. Thank You!

Always good to listen to you

Fascinating .. love these repairs.

thanks for sharing sir more tips i always love to see more of your videos on how to fix laptop issues more power to ur channel

This was a nice to the point and educational video

Spring, do you actually teach people this from scratch? Often there is too much background info on how these things work, some people only want to know a path to walk from power going in at each point so that they can actually see no power at certain points. There are too many people that go through the science, ohms law, calculations etc and some people can’t take it in that way. The easiest way is to see a simple on off type of explanation to a circuit. That’s what you done in this video and I really enjoyed it. Simplified and no long winded explanation. Keep them coming!

Thank you, good video it held my interest till the end.

respect sir got yourself a sub. your a wizard you remind me so much of my world of electrons intro class

Love this. subscribed

Very useful. Thank you.

Nice Explanation

...no more proper calibrated bridges :)

Sorin, you are such a genius :-)

Oké, i sometimes watch these vids , not for a while though, but now this one was in my recommendations, and just bought a second hand laptop to try and fix up. Guess which laptop. indeed an i3 toshiba satelite from 2012, specs not sure, but looks exactly like this one. What to make of that, the coincidence (if it is just that !?) i mean. PS It was i think the only one of this channel on there, certainly the first one.

Great work! Thanks FR

Very informative tutorial video.

The man is a genius.

Congrats on your sponsor!

Beautiful video!

I fix one loptop yesterday i follow the what sorin said.. And 3 more in this day.. Thank you for this man.. legend aim from Philippines.. Cellphone laptop technician. 😇😇😇😇😇

that was a very informative video.

Great Video....Thank you.

You have a very relaxing voice

Great video! It helped a lot.

thanks for this great tip !

thank you

awesome, u are incredible, greetings from brazil

Nice it's educational

Hi, love the videos, what temp is a safe temp for removing a mosfet like the ones in this video?

Thank you

Good stuff

What a legend

Awesome !

Tnx man for show this ❤😮😊😊

New to your channel. Very Interesting video. What temperature do you use to reomove the small mosfet? New to these types of repairs with Rework station. Thank you.

Am impressed with your content all the way from nyeri kenya. I would like to be your student.

Nice! I have a stack of Toshibas I'm selling off before Windows 10 support ends next year. They are still good machines for basic Internet access and streaming.

Very good 👍 sir

That’s amazing. My old MacBook died a few years ago. No power, not charging. I hope I can bring it back to life!

U are a master blaster❤❤❤❤

How do you know what values the mosfet chips should output in the multimeter? And what setting are you using on the multimeter? I assume it is 20 DCV.

If I was Captain of a Starship I'd want Sorin on board for sure 😃

Hello. Amazing work. I'm just curious how does one begin to learn repairs at this level. I've been wanting to learn but I don't know where to start.

You are the best

Very nice video! I just wished my laptop motherboard had components that easy to identify lol, everything is so small I can't even identify what are the mosfets to check =/

I want to learn how to do this so much! Like, in familiar with low voltage stuff like wiring and I do know some basic electronics, but what kind of education would assist me with this?

your better at this than i am

I've always wondered why the 2nd mosfet always smaller size than the 1st mosfet?

The most innofensive pcb way advertising ,....... Congratulation !!

How do you connect your charger to the multimeter?

11:10 I learned that pressing the power button means connecting the ground with something in the power button connector. Did you connect ground with minus (neutral) or plus (live)?

Hi My friend, i have the same mother board turns on but when i plug the exterior monitor in the VGA port the display on the monitor turns off and u have to know the monitor works fine with other mother boards, so what do you think the problem is ?

Hi to everyone, I'm trying to repair an old laptop for fun, I have some questions and I need help. I think that in my pc, the first and the second mosfet are shorted, I bought 5 chips with the code of the first one and now I see that the second one have a different one. I can put on the same or I need to buy and wait the other with the right code? Thank you!

cirr-quit to sir-kit If it helps, but it does add character.

woOo|OoW very niCe repair ❤👍👍

Thank for the video ... pls i have a mini dell when yiu press the power button the system will display and cut off as if the power was remove from system without battery inside hope you get my message... i need your help

hello Mr engine the mosfet you put in mother board donot carry the same number of damaged mosfet is it normal with power circuit

uncle, thank you, i have old HP laptop elite book 84 something, and when i plug it in it keeps swiching on and off, then one time, suddenly it works fine.... then same proble again, and i notice when i plug in one house, it does restarting, if other house, it dosent even swich on, and sometimes if power right it works properly, also when its plugged in... the electricity runs like inside all metal parts so i can get a small electrocution, can i repair it at home, what should i fix?

Hi, what is IC P24, motherboard burnt plastic cover

8:05 how does a circuit tell the first mosfet that the second mosfet is shorted? Is the circuit inside the first mosfet? Where are the signal paths?

Hi Sorin and everyone. I have a Lenovo yoga 260 thinkpad laptop that I forgot the username, password and bitlocker key, is there a way I can delete the username, password and bitlocker-key please, I would really appreciate any help Great video thankyou.

Please make a video how to fix dead, no power dell Inspiron 1570 pc

Every video should be like this, proper zoom, proper explanation.

What exact mosfet we fix to motherboard.. P channel or anyother

I thought if the source & drain is shorted its the same as the mosfet being switched on?

check on da screen !

when starting, the power light comes on for 5 seconds and goes out. The fan also works in those 5 seconds, there is no picture at all. Can you advise what to check first. It is the mbo la-b991p

The power supply mine came with started to have charging problems laptop took to lower computer performance issues. So bought new higher wattage laptop power brick for the barrel plug. Still low performance. Lucky it had hidden usbc power delivery port. Didnt know that because it was over 7 years laptop. The performance was back but already bought a new laptop. Use the old one but the screen is also bad and battery. Use the hdmi to a monitor take off bad screen use it for small gaming computer.

How many voltage and amps set in dc machine laptops

woot woot... we have sponsorship!! pizza for everyone!

I'm currently doing some research on Mosfets, and I'm wondering if I have something wrong. At around 11:38, he's probing what looks to be pin 8 (based on the dot) calling it the input, which according to the data sheet is drain, then he probes pin 1 calling it the output, which according to the data sheets is the source. It is my very limited understanding that the source (pin 1) is input, and the drain (pin 8) is the output, the PCB markings in the video even suggest this to be true. Can anyone provide some clarification regarding my confusion? Thanks.

selalu hadir pak

How to know if it is the first mosfet or seconf mosfet? sorry, i didn't get that part.

I have a DELL LATITUDE laptop that wont charge the battery....brand new battery but it shows '0' charge....any help would be great

If all MOSFETs are not the same, how do we purchase a replacement for a faulty MOSFET?

My world is full of broken Laptops so much so i am never buying another dodgy Laptop as im sick of burnt out hard drives and stone dead EMMC chips aswell i was wasting shed loads of good money after bad on dodgy Laptop batteries. .So i got an SBC (single board computer) now my worlds changed and im never looking back..also with Sorins help my old Laptops will be repurposed as i cant suffer to throw them out but i swear that when it comes to Laptops i will never get conned again..!!