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

[@groovejet33]

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

[@tinkmarshino]

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..

[@4quarius]

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.

[@abdelouahababoshighiba2878]

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

[@TrueNorth1970]

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

[@cezaridox]

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 .

[@K1ZEK]

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

[@electronicsrepairschool]

Thank you Leo!

[@adrarian]

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!!!

[@edmart3778]

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

[@christipan2100]

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!

[@richardbalatayo5473]

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

[@Mecano.r]

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

[@Dr.muthanna]

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

[@juanchizabaleta2405]

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.

[@alfrednoprice2904]

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

[@Labyrnthdom]

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.

[@annierenard5954]

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

[@Dmiliunas]

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

[@dazzkhan2299]

I am learning very nicely from this channel

[@freemanrolle7864]

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

[@NicholasDaniel11]

Good one Mr Sorin, may God bless you

[@fichambawelby2632]

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!

[@knightwar3]

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

[@pedrof.7821]

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

[@recommendedforyou157]

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

[@annyan904]

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

[@bnarzary6506]

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

[@adrianp5667]

you are the king of defects

[@vijayantenkasi2116]

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

[@akapal]

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 :)

[@arifryo6823]

Alex Xomon no offend, but I think you have to seek more experience..not that you have none, but seek more, learn more,..

[@arifryo6823]

Alex Xomon you can see louis rossman video on using diode mode...if you dont believe me, you surely can believe rossman, who is more knowledge and popular,..

[@geernellocson7844]

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.

[@vhongcarpio3418]

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

[@samsscia]

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

[@smibenarous9872]

thakns you from tunisia you are the best

[@theethicalh3707]

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

[@sylwiachaber9667]

it was a really good lesson. thank You.

[@rohanwatson1392]

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

[@ricardomardi]

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

[@johnmanning1006]

thank you very good illustration

[@rashh77]

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

[@aragaoclaudio]

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?

[@leebah9]

Good job

[@allankartin]

Sorin, you are a geniurs, thank you

[@tingseahtiong9268]

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

[@mohaha9245]

Great work pro !!!

[@PerrynBecky]

I've repaired cars for 35 years, and I've ran into electrical nightmares that were connected "bass-ackwards" where it made no sense how the component I was trouble shooting was wired. Even with a schematic, it didn't make sense on certain vehicles, and if you work on many makes and models, it only adds to the complexity and often perplexity of the job. Glad you got it figured out.

[@sitio72]

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.

[@josephbrennan4622]

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

[@TeacherBrunoOneil]

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

[@LaptopDisassembly]

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

[@yuditanoto6704]

its just 19 volt power rail, maybe 19 in ->resistor -> 19 out something wrong when input more than 19 volt

[@f1lab535]

what is the difference between a capacitor and a resistor?

[@electronicsrepairschool]

en.wikipedia.org/wiki/Resistor en.wikipedia.org/wiki/Capacitor

[@jeramsadventuretv4905]

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

[@sergelavallee913]

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.

[@Liveables]

incredible gentleman

[@PaulHigginbothamSr]

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.

[@hadireg]

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!!

[@AndrewTuboro]

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

[@wisher21uk]

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

[@Labyrnthdom]

Is it possible a cap can burn and be black. Tricking you into thinking it is a resistor?

[@serwadddayasin8404]

Capacitor goes black if faulty . may be if u check if it grounds

[@ElTexMexAlex]

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

[@saarike]

That was really exciting.

[@GregM]

Did u replace the fuse that you removed along with the cap that you also removed looking for the short?

[@omardmc889]

no he did'nt

[@johncote1268]

Replace cap

[@protonx80]

the original fuse was blown ... and was replaced with a more technically advanced fulse ... called wire 😊 the smirk on his face when he does that in all his videos ... is .... well undescribable thank you sir Sorin ... your videos are very very informative ... i am not in the repair business ... and still i watch all of your videos ( i used to deal in computer hardware from 1994 to 1997... )

[@ecobob101]

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?

[@gregwelchfastmail]

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!

[@jetpackk1]

Great video. What make of scope do you use?

[@MrReeceyburger123]

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

[@JordynBaby63]

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

[@realMrVent]

I don't think it would make much sense to put that in the model number. What you mean would be in the article number at most, but I've never seen it in a model number.

[@ParadoXGaminGMijat]

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

[@talhapatel5563]

Wow this video is so good

[@MrRvdbeek]

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

[@noufiyamol7615]

ohh man. you are awesome 👏🏽

[@ammaralmehdi1968]

You are grate sorin thanks alot

[@myw4y]

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

[@dmisi1]

excellent video

[@martijn4740]

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

[@giorgostexnikos4118]

iportand lesson for me sorin thenks for that lesson

[@ajw6715]

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

[@eduardocamps8148]

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.

[@eeevvveeevvveee]

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

[@morshedulalam2983]

great job

[@Liferoad371]

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

[@NANO-SERWIS.MAREK-DASZKE]

Good Video , nice .

[@RafalScrapper]

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

[@Unbricked]

1 of the best! Thanks!

[@absolutelypc5835]

Hi thank you for all your hard work and great video, i have been searching for long time how to make video on KZbin 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 KZbin 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 KZbin

[@ldiazmdiaz]

see ...kzbin.infosearch?query=video+tools

[@Swenser]

Hi Sorin, I have laptop shuts off/ power cuts random but within a short time only when AC used. tried different adapters. Do you think can be battery/AC power management circuit. I'm thinking must be electrolytic caps in pmic circuit because its random. On battery only works

[@mp6294]

the "petrol" fluid you are using that evaporated with high heat, what is that fluid please?

[@Vinnie2x]

He calls alcohol petrol. Its isopropyl.

[@protonx80]

@@Vinnie2x in his other videos .. he does refer to isopropyl alcohol .. .when he uses that ... so he notices that difference ... this is probably a refined or better quality petrol ... or lighter fluid probably ... it evaporates a little slowly as compared to what i would expect IPA to

[@Vinnie2x]

@@protonx80 You are correct. My mistake.

[@ahmedslameh6030]

Good video

[@adnanbalkhi7969]

thank you ,what is the liquid that you use?

[@omardmc889]

how come the component not shorted when he use zippo or liquid flux and supply the board with volt for testing ???

[@almerkechalmer4416]

When you have a fluid with free ions it will conduct. Any acid or alkaline substance will conduct. Hydrocarbons have no free electrons, thus they cannot conduct electricity.

[@ldiazmdiaz]

@@almerkechalmer4416 I also seen 90% alcohol used

[@sarkisavedikian3713]

do u have any repaires made to a blinking power led on laptops that wont turn on??

[@faresshaker7765]

thank you , which pin you tested in the startup chip for 3.3 v , and is it the same pin if we have another brand

[@electronicsrepairschool]

yes, all are different

[@omardmc889]

how come the component not shorted when u use zippo or liquid flux and supply the board with volt for testing ???

[@macgaver1571]

actually i find the problem after u pickup the blow up cap, coz i know first one u pick up is a resistor depen of the color n power real..... coz if that is a cap, there is must have negative or minus real, but I can't see minus real..... so i quess that is main power. n after u cut down the resistor ofcoz the first gate is no shot anymore coz the short is not in first gate like u think... btw i like all of ur education..... thks for all the video......

[@mohammedaram7514]

Thanks from egypt

[@preet710]

hi i really liked leaned videos and this video is very good what liquid u put in for checking short capacitor ISO PROFILE/Alcohol /petrol ?

[@byamukamajames7391]

Hi, I enjoy your videos

[@zee7333]

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

[@zeldasharpe131]

Hi Sorin, what is it that you put onto the motherboard and why? I notice that you put that liquid round a chip when you are going to replace it.

[@0dium.]

that petrol evaporating method on the heating resistor was a bit misleading isn't it ? :)

[@khentdelacruz6198]

how about blinking light and only useable if you charge it?

[@radishprouction2714]

I have a dell studio 1557 the system os running but no display i did alm the steps of troubleshooting i even clean the ic yet i get no display. What do you thing?

[@davidtoro6006]

Hello, what liquid you use to detect heating or short component. Thank you, many years under your belt, love your video creating heating blower which you really lived that video:memories for you

[@diy_home]

He is using zippo fuel (petrol). You can also use Isopropyl alcohol