Toshiba Pro R50-b-12P, dead, motherboard repair, confusing one 

It's great the way Sorin talks to the camera. He makes it so personnel, which draws you in and makes you want to listen and learn. This guy has got skills, well done mate

Priest Sorin! oh that was funny... Well, Father Sorin.. this was a very very good video.. I am starting to get it! amazing, at 68 with a poor short term memory problem you are starting to teach me new tricks.. I am so pleased.. thank you so much.. You my friend are really a good teacher..

Man! you really are the best in electronics repair.... Thank you for this video...

same problem, same confusing with an older PRO toshiba laptop with one mosfet in 19v and I did a whole day to find a short! nice video professor Thank you!

We learned a lot from this video.. great job Sorin

I love the phlegmatic way you diagnose and perform the repair .... super !!!!!!!!!!!!!!!!

Best explanation of difference between using multimeter and using powersupply to check ever! Thank you !

Sorin, you are a life saver. I can't sleep and I can't work because my son sleeps in the same room I have workshop (hard times), so I watch your old videos to learn something and especially to not get crazy with my insomnia. Just thank you so much, again.

Wow, i am actually learning from you. Before I got to the end of this video. I was suspect of the first cap/resistor you removed when you was working and found the missing power up to the burned cap above the fan. Thats crazy, because I dont know that much. Thanks for putting in the work on these videos. You are helping alot of people who are interested in this stuff.

One of your BEST videos. You had trouble and more trouble ! You talked it out and got it working , great job and yes even at 72 yrs old I to still learn , it is called getting experience. Thanks for making the video.... Leo

very well explained, I repaired my laptop with your help, I had exactly the same problems, you are the best man

This is what I like the most about you professor ,you always admit you were wrong when you make mistakes ,you are awsome.

You are doing a great work sir, i appreciate your time and effort.

You make the repairs,true and live,with a method of resolution,step y step.Many thanks for your knowledge and shared experience.Fraternal greetings, from Argentina.

There are a lot we can learn from you bro you are the man

this video answers my questions about using the power supply when testing each power rail. thank you so much sir.

Acea componenta de pe railul de de 19v este o micuță bobină care seamănă cu un condensator dar spre deosebire de condensatori are culoarea gri . Super videorile tale !! Mulțumesc pentru ceea ce faci este un super training in the job pentru mine .

you are the best tech on youtube i've learned many things watching you bless up keep up the good work

I am learning very nicely from this channel

Very very interesting video. Learned a lot from it. Thank you.

you are the best youtuber for laptop repairs pls continue the good work

Sir, You are so good of what you are doing I admire you that way!!!!! Thank you for sharing this.!!!!God bless!!

I have been solved my laptop using your explanation. So,thank you so much to you

Great, you can repair any faulty laptop, thanks a lot, very informative video, I hope see more.

That was really exciting.

great video as all the others... thanks for sharing your time and knowledge...

50:18 Finally. See Mr. Sorin VERY VERY happy!!!

really we can learn alot from unfixing laptop video..great sir..you are our guru..

Wow!😱😱 You really are a great technician.. thanks for this very informative video.. I learn a lot from you. 👍👍👍

you are the king of defects

Hi there , the same capacitor on a Tecra C50-b1271 i honestly don't see any difference between the two models , so after seeing your video i directly checked the faulty cap AND it was shorted so removed it The laptop started one more time THANK YOU THANK YOU we learned a lot from you!!!

Good one Mr Sorin, may God bless you

I believe the second mosfet is ok. Good job Sorin.

Learned a lot from this video, thank you very much. . . God Bless & keep safe

thank you very good illustration

Great work pro !!!

than you very much sir sorin i always download your videos they are my main reference i really love you man thanks a loooooooooooooooooot

it was a really good lesson. thank You.

incredible gentleman

Nice job, Sorin. I had the opportunity to fix one of these. It's a bit extrange machine. The input mosfets are located away from the power input, and the traces are not very common. In yours, you almost had a fuse; in the one that I fixed, there were no fuse or anything. It was previously manipulated (I hate it!), and there are no schematics for this model. Finally it worked, but it a was a multiple damaged computer...caps shorted, Mosfets...Congrats!

love ur skills...clear explanation ...ty sir. liked and subscribed ...hope i will learn more from ur video

1 of the best! Thanks!

You should do a video on trouble shooting with a bench power supply. I've been repairing electronics for 20 years, but I never learned to use it as a trouble shooting too. only to supply voltage. Great videos, I watch them while repairing UPS Power Supplies for the telecommunications industry. Thanks

Nice work Sorin liked this one a lot realy enjoy your awesome video's

Reminds me on the LoadPro that is used with a multimeter, mostly used for cars to find shorts. Very similar to find shorts.

Now I no were to find the 19v power rail thank you for it

you are amazing! thank you for this video

love Mondays 👍😉 Sorin for those repeating questions, would it be a good idea for each new video to be inside a Diagnosis playlist let's say "shorted MBs" etc... I know this could be a hassle, but if possile, you'll just tell views to go and watch that topic playlist ;-) thanks for everything and the clear explanations!!

Good job

thank you for this video...

thakns you from tunisia you are the best

Sorin is getting old. Good job man. Every one gets things wrong from time to time. Good recovery tho.

great job

Now you have me wondering about my MSI PRO motherboard :)

Just shows we cant be right all the time, Thank you Sorin.

You are grate sorin thanks alot

You were right at the beginning the short circuit is after the first mosfet, the probes didn't make good contact with the pins because that capacitor you were injecting voltage at is in the same track with the first mosfet and current sensor resistor maybe if you haven't taken that inductor out you could've seen that shorted capacitor the problem is that it was far from what you were seeing on the microscope a thermal camera would've been very helpful in this case and i know it's an old video lol thank you for another good lesson

"It's on, we have picture"!....lol...this guy:D

5:06 LMAO 😂 you are a comedian too! Thank you for all your videos I love them all.

Thanks from egypt

iportand lesson for me sorin thenks for that lesson

Seems to be a flawed design by Toshiba. Just fixed the same, with exactly the same issue. Your video helped me a lot, thank you. Couldn't see that blowed CAP near heat pipe. Mine blowed very "inteligent", just a small crack, impossible to see without super magnification.

you are amazing..

Good Video , nice .

Hi, I enjoy your videos

excellent video

something i had fond out ages ago was black = resistor brown = capacitor

Great video. What make of scope do you use?

ohh man. you are awesome 👏🏽

honestly I learned a lot... thanks to you, without your videos, the things is your a wonderful teacher to all, I was a electronics technician just learning in our school, I felt is useless and turned into ID Interior Designer, cause of your videos with learning, looks like I wanted to be come a Technician again, honestly looks like easy to fixed because of your sharing ideas about Electronics trouble shooting which is I get rid of it... anyways many thanks I hope more videos encounter possible ideas from you.

Good video

In this case, I think Pro means windows 10 pro. Love your videos.

Hello Sorin, i have to disagree with you at the start of the video, i didnt finish the video yet. -Diode mode is meant to measure diodes, actually the multimeter produces a small voltage and then measures how much voltage is lost at the diode like 0,7V, when measuring from ground to plus the small voltage has to travel all the motherboard and you have all voltage lost like you did on your test and when you put your leads together you can see 0V (dropped/lost) exactly like your test. - To check the fuse you could use continuity on the multimeter -to check a short we have to use Ohm test on the multimeter and not diode, they are not the same. thank you for your fantastic videos :)

"If this is a PRO,I'm a priest." GOD 😎

thank you ...

yeah you totally right i think i just fry memory and CPU at my last attempt lol tough I got to learn it somehow and as far I know what I do wrong I do learn something

I literally said the same thing to myself at the same time as you said “how is that a pro”? Haha

To shutdown windows without installing updates. Click on the Desktop, Press Alt+f4 then select (shut down) OR Press Win+L to sign out. At the login screen, click Power icon (bottom right) then choose Shut down. This will save you lots of time!

First, congratulations for all your videos, I learn very much from them. I have a question: in this video, just before you find the problematic capacitor(20:53 min), you were about to say what you have to do if you can't see what is getting hot with the power supply. Could you tell what do in this situation?

Beyond economic repair ! Great video though !!

What was the purpose of the problem resistor, and will it function like before with the bridge.

thanks , very n niche

Excellent teacher! My laptop misses letters and space. New keyboard. What can be the problem?

sir your realy grate

I stopped doing updates about 7 years ago. What happened was with every update the machine ran a bit slower, and lost another function it had when new. After about 5 updates the machine is dragging, and none of the extra functions it had are available. So I bought another hard drive and with the new machine I saved its state to when new and put in a faster and bigger hard drive. As it slowed down and lost functions after a number of years, I put the original slow hard drive in and was pleasantly surprised how much faster with all the functions still working and copied that to the new drive. The problem is I lost all the information and pictures I needed I had added. So I saved them to a thumb drive next time.

you are great

nice job, teach me a a lot. thx. But why you took the cap and the resistor, and the laptop can still working ?

hi, I insert the power cord tested the adapter which is getting power also the pins in the power connector waited for minute but nothings getting hot. what else to i need to do thank you.

That's why Sorin prefer the BRUTAL FORCE HIHIHIHI! We miss you a lot Sorin. Come back even if it's just to talk! Thank's and take care.

That was good. I learnt a lot. I did think that the first short was more black than yellow so thought it maybe a resistor. That is my limited experience so far black for resistor and yellow for Caps. Is that wrong? I replace everything from another board with that theory as I'm not confident with leaving things off. Is there a quick answer for why those Mosfets have four exit pins connected to the same place and don't have separate lines leading away from them?

this video is best..

if the IC is heating while conected 19volt what i do for it chang it or some another issue

hi man, i am a fan of your repairs coz it helps me a lot. . . can i ask what is the difference with the multimeter and your power supply multimeter? can you make a video of it? thanks men

Master! :)

what is the difference between a capacitor and a resistor?

Have a same kind of laptop but there's no power passing through after the power adapter on the mother board. What might be the problem do you think? Please help me out.

Hi thank you for all your hard work and great video, i have been searching for long time how to make video on RU-vid and i am struggling with it , if you can help me i would really appreciate Here what I need to know 1- Equipment to make video on RU-vid 2- How I connect microscope and other equipment 3- Programs as you do move from the microscope to your face I can't find anything helpful on RU-vid

are you bypassing those resistors? or those are diodes or fuse?very imformative thank u.......

one question sorin. when u use the Dc supply to check for short, do u use only Volt, or do u also use it with Amp same time?

Si amigo hay configuraciones con un diodo y un mosfet de entrada lurgo la resistencia de sensado y el otro mosfet es de conmutación para alimentación del equipo por bateria. Esa configuración es vieja.