Motherboard repair tips & tricks - Toshiba C850 laptop not charging, not turning on - a simple test
2024 ж. 8 Сәу.
87 095 Рет қаралды
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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.
Smart
That is very common on every single tutorial on KZhead that is not everyone is an expert, but the author often missed to just warning for newcomers.
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.
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.
dissembling/reassermbling does take a few extra minutes at times. Quicker with Toshiba, older fujitsu. Some older HPs were a bitch
He is the one best ever guru presented on KZhead. Naturally skilled! I learned a lot from him! Thank you Sorin!
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.
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.
An absolute brilliant diagnosis!
Спасибо! Не ремонтирую ноутбуки, но за ваш труд и открытость - огромное спасибо! Хороших вам клиентов и интересных работ
Thank you for sharing all your knowledge with us. You are such a great teacher and explain things really well.
Fascinating .. love these repairs.
Always good to listen to you
As always I have learned something. Thank You!
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 job thanks really blessed by your lessons greetings from Nigeria ❤❤
Nice teaching experience thanks Sorin 😊
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!
Outstanding as usual. 😊
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
Thank you Sir for your time on this video. Helped me a lot.....Cheers!!
Great work! Thanks FR
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.
The man is a genius.
Nice Explanation
thanks for this great tip !
respect sir got yourself a sub. your a wizard you remind me so much of my world of electrons intro class
Thank you, good video it held my interest till the end.
Beautiful video!
This was a nice to the point and educational video
Very informative tutorial video.
Great video! It helped a lot.
that was a very informative video.
Congrats on your sponsor!
Awesome !! No isopropílic alcohol bloodbath , no flux bucakke. Perfection ...
Thank you
...no more proper calibrated bridges :)
Those were the old gold days
I kinda liked that brute force approach.
The first laptop I ever repaired was using a proper calibrated wire I learnt from Sorin.
awesome, u are incredible, greetings from brazil
Tnx man for show this ❤😮😊😊
U are a master blaster❤❤❤❤
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. 😇😇😇😇😇
Am impressed with your content all the way from nyeri kenya. I would like to be your student.
That’s amazing. My old MacBook died a few years ago. No power, not charging. I hope I can bring it back to life!
you have nothing to lose, please make a video while doing it (even if you burn it, it will be interestnig!)
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.
you can get windows 10 iot enterprise ltsc to update until 2032, there are ways to get it activated
You are the best
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🇲🇨
Now you are ready to open a repair shop!
You have a very relaxing voice
Hi, love the videos, what temp is a safe temp for removing a mosfet like the ones in this video?
If I was Captain of a Starship I'd want Sorin on board for sure 😃
woOo|OoW very niCe repair ❤👍👍
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.
cirr-quit to sir-kit If it helps, but it does add character.
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.
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.
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?
I've always wondered why the 2nd mosfet always smaller size than the 1st mosfet?
check on da screen !
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.
How do you connect your charger to the multimeter?
Mostly the first MOSFET 😊 is the problem here. I have seen this problem many times in this Toshiba.
How many voltage and amps set in dc machine laptops
hello Mr engine the mosfet you put in mother board donot carry the same number of damaged mosfet is it normal with power circuit
I thought if the source & drain is shorted its the same as the mosfet being switched on?
Sorin, just a FYI bios pw on Toshiba is not easy to remove. Removing battery does not help. Toshiba has a code that needs to be cracked. The info is not widely available but some random people on forums sometimes provide some cracked codes for $. Would be good to have the actual info to crack this bs out in public domain....
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
Hi, what is IC P24, motherboard burnt plastic cover
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?
What exact mosfet we fix to motherboard.. P channel or anyother
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 most innofensive pcb way advertising ,....... Congratulation !!
PCB Way ... your design today , our products tomorrow .
Hello ❤ sir.
How to know if it is the first mosfet or seconf mosfet? sorry, i didn't get that part.
👍👍👌👌
Every video should be like this, proper zoom, proper explanation.
😊😊😊😊
Hi Sorin, thank again for this new lesson i appreciate very much the calm with u explain....thanks for sharing have a good day bye Francesco Timpano from Florence Italy...
In my case, I bypassed it. It worked, but the battery is not charging. Can we convert it with a 3 legs mosfet 😅
just Legend!....thank you!
£80 to repair a laptop made in 2012. the guy who wants this repaired must be mad, not worth repairing for £80 😂😂Good video Sorin
I think Sorin must have found that one in a local recycling centre..
Prices in UK are crazy, charging port costs 60pounds from videos of sorin, you can make a living just replacing ports
Yea... and maybe it has bitcoin of 500.000$... not so bad for 80 pounds, yes?
@@akierum Just because you've watched all his videos, doesn't mean you have all the diagnostic skills, the ability to remove & replace tiny components under a microscope etc and understanding of how to locate & replace with compatible parts from a supply of old boards. Sorin makes it look superficially easy. Even 15 years ago , before my eyesight went to the dogs, I couldn't do the soldering stuff he does. And the 1st few repairs you do are probably going to trash a few boards
@@daffyduk77true, Sorin makes repairing an UFo easy
woot woot... we have sponsorship!! pizza for everyone!
Thanks for sharing your knowledge with us. Really appreciate it.
Winner winner chicken dinner! Or pizza ;)
Good job mate
Ok, so how do I fix half the keys not working?
Thanks for sharing 👍
nice easy job i wish they continued to make laptops like this much simpler for us who like to repair motherboards.... new laptops are insane with all kind of faulty chips etc... they do that on purpose to destroy our business to make most of people to head to shop and buy another laptop :( :(
this is a really good tutorial video, but the purse holding in me, sees you got £80 for this repair so the computer shop charged the customer more, yet as the device is so old now, you can buy a whole 2nd hand computer for less than the repair. At what point do people consider it not a viable repair? hdd's can be removed so its not like a data loss issue. what am i missing here?
Moving the data will still cost. Also setting up new laptop etc some people have no time and just prefer their normal one fixed
In your old vidios you went for calibrated wire, did the board charge the battery?
Good job ❤
Those PCB samples "One PCB Ruler 📏 them all"😂😂😊
Thanks for amazing video
What indicator suggests the main power rail (where you injected V) when it's so close to the CPU? Can we look the rating of the capacitor for an indicator? Or are there other signs? thanks
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I have a hp 840 g3. Powers on. No display on LCD. but can display on VGA. Have changed the screen, changed the cable, no difference. Connector has 19V.
GRAHICS ISSUE
Hi, please, are you using your special power supply to check curent draw or what?
😍
makes one wonder what is the "quality" of the "repair shops" that can't fix, or can't take time to watch and learn?
On an old laptop like this almost no repair shop will spend even a the minimum amount of time. They'd advise the customer to get a new one and strip this one for parts (LCD panels are always nice to stock up on). Since I live in a rural area these kinds of laptops still have some value so I would spend a bit more time trying to find the fault. For me personally the next step to getting better is a microscope that is quite expensive.
So what’s a good class or training one can get in videos online that teaches what mosfets are interchangeable? I would pay for a video class or series that teaches this.
Learn how to find and read schematics and you'll learn. Sorin's youtube channel actually teaches this. Go into his playlists
You don’t have to pay just look it up here. 2 main channels that don’t repair but explain electronics and components that are good : The Engineering Mindset & Electrical Electronics Applications. That they both are are good at tech general electronics and components. Sorin also has videos in his playlist.
nice old day, simple circuit. no usb c shit
usb-c is the highest failure, it the main thing for planned obsolescence for laptops, phones, tablets.
😂❤
this one fix had no proper calibrated fuse... how about that...