Desktop PC's - steps to diagnose and repair

[@teatimee]

I loved how you are so calm and methodical in this video. Great teacher.

[@steffanjames2992]

No repair to hard for you! That was amazing. I could see it was frustrating but you showed us to take out time and think things through, a great lesson in repair from you, you truly are a master.

[@SanelKeys]

You're great man and human being. Me, myself, I'm professional, specialized for power electronics and motor drives, but I enjoy in your videos. There's always something interesting, especially for young people interested in electronics. Please, just keep making videos. Greetings from Bosnia and Herzegovina.

[@davidmcniven3543]

A sheet of thin, hard, plain white laminate like Formica stuck to my desk with 3M double-sided tape (so I can replace it with a new piece when it gets too scratched, burned and chipped) makes it a lot easier to see stuff. I stick a piece of white butyl tape near the back of the desk and press screws & small parts into it in left to right straight horizontal rows starting furthest from me and working one row closer with each sub-assembly. (as a lefty you'd work right to left I guess) That way they don't roll around and get lost - and for reassembly I know to pick them up in reverse order. Works great almost every time. A thermal camera on my phone shows me right away what's drawing current. I need every advantage I can get because sadly I'm not half as skilled or as fast or as good at diagnosis as you '~' Thanks for the very helpful videos Sorin!

[@gurjvirdee6308]

His. Great work in all your videos. Quick tip with All-in-one desktops....yhe circuit somehow gets in a short and cannot snap out of it due to power from CMOS battery. Most of the time just remove CMOS battery and press Power Button for 10 seconds. Then put CMOS battery back in and 90% your machine will be fixed and work as normal.

[@groovejet33]

Sorins Discord is best ive seen? The shear amount of literature, books, How to guides, Pin outs and schematics, on and on and on and on......If you want to learn or fix something? You cant go wrong taking a look...It's great.

[@MrRvdbeek]

I thank you for all the repairs Love your work every time.

[@popicagabriel79]

Hello Sorin. An ESR Meter helps you a lot at electrolytic capacitors. Even if they are not swollen or leaking, they may be defective.

[@Todestelzer]

I always get the hard jobs. Motherboards with broken chipset BGAs.... Bought a preheat station now to replace these chips. Diagnose a motherboard right is not easy and took a long time but it’s very interesting to see how much signals you need before a motherboard is turning on fully.

[@Igot2fly1]

Thanks Soren, I just fixed my 47” Visio TV this morning from following your diagnosis technique. Another great repair

[@Igot2fly1]

It’s not boring at all. I’m learning something from every video. Thank you Soren

[@hazimhazim9235]

We will miss you Sorin Thank you for every single video 🤝

[@AlanHernandez-kl7ld]

A Power Supply fix is an interesting fix! anything in this channel is really appreciated. Thank You and happy Holidays.

[@computersrepaircotesaint-l7407]

there is A LOT to like dear friend. thank you and please more desktop motherboards

[@sofouli]

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[@juanagutierrez8681]

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[@williegreenway5464]

Happy Holiday. Thank you for working on a desktop motherboard. ..you are a great instructor. I would recommend your work and teaching to anyone. Keep up the great work...Willie

[@andyturner1727]

Thank you Sorin. Better to have failed trying than not trying at all. Thank you for your generosity . :- ) ;

[@AQAVAR]

Finally a Desktop one, thanks.

[@Liveables]

Very great video, I have learnt that if your power supply has fluctuating or low voltage out put, usually check caps

[@waleed9128]

well done on the repair. one recommendation for you is to invest in ESR meter. it you have the ESR meter you would have done with the repair long time ago. have a great day.

[@Ashley-jg7fo]

Very nice work Sorin... your patients and skill is inspirational

[@DanielCardei]

the scope its perfect for advance repairs :D checking phase on CPU and GPU. Detecting bad mosfets.

[@Max-Technikchannel]

I can barely speak English but have learned a lot through your videos just by watching: D Keep it up!!! good work!!!

[@eddieloius4592]

33:50 How do you know which component to check for charge/discharge?

[@Aneesh.Asokan]

Check only high voltage capacitors that hold fatal voltages & if they are holding charge, discharge them before handling it!

[@TravessurasAnimais]

I just became fan of you my friend. A Venezuelan Guy living in Peru, Says Hello to you. Have a Good day.

[@hackersgaming1526]

Checking voltage by oscillope 3.4v flat h line means good DC 6.4v distorted h line means bad dry or leaky caps.mostly we use osc.tracing signal gate drive signal.etc sorin sir you are best electronic teacher of world

[@hackersgaming1526]

You are best teacher of world

[@stefaancodde6578]

An atx psu checks all power lines, if one is not good, then the atx psi gets a power failure signal. It the harddisk is acting it means the +5 volt and +12V rails are working, but an atx supply generates also +3.3V An atx supply needs a minimal load to tuntrn on or the power failure line will get high. An atx psu generates also -12 V but that was used on older ISA bus and a +5 Standby that always is available. The power OK line is grey. As soon when the power OK line is connected to groud, the atx supply will turn on. Power OK is Green. IF the CPU fan is turning, this means that the board is working

[@stepsvideos]

Hi Sorin, and thank you for sharing your repair experiences. After watching your videos I volunteered to try and fix a laptop. I found a complete short on (from schematic) a ~1 volt supply. I've seen how sometimes you can find a bad cap by its heat, so I tried the current test, and alcohol, to see if something was heating up, but nothing is heating up... ~1.8 amps is going straight to ground. I was wondering if sometimes a bad cap could be completely shorted, with no resistance that would make it heat up? If not, then would a shorted mosfet be more likely? Or maybe 2 amps is not enough in this case? Thanks! PS I only have a fixed 13.5v supply, so I used a 12v, ~21W bulb in series with a diode to ground. The power I am applying to the motherboard's 1v supply is coming from across the diode.

[@muhsinimruma802]

Thanks for your knowledge GOD BLESS YOU MORE...happy weekend Sir...👏🏻👏🏻👏🏻

[@mwitazacharia8525]

Nakuona kaka mambo vp, naona mzee ameamua kutupa na maujuzi ya desktop which is very gud thing

[@terrycadd9281]

holiday for whole week ? i bet theres many who will be counting down the days till you come back with another video. looking forward to your lesson on power supplies , i really liked your transistor lessons especially when you sanded the transistor to make a photo light sensitive switch

[@LaptopDisassembly]

The good brand PSU's are increasing the voltage when under load. So 11V without load is normal sometimes. Good video again. :)

[@laser-on-off]

Thanks for this : another great video ! Love watching your repairs. Desktops are also interesting.

[@Dariuszdaro-eu6hv]

Hello Sorin, very good job I like watching your movies so I'm waiting for the next :) Greetings from Poland

[@colinmalcolm1211]

Another great great video. Keep up the work Sorin helping us all out. Have a great holiday

[@johanherrera6897]

have a great holiday Sorin! awesome video as always

[@amtpdb1]

When you check the mosfets, are you suppose to have the same voltage going in as going out if everything is working? Will they all have the same voltages on all mosfets or will there be 2 mosfets for the 3,5,12 voltages? Thanks for the videos.

[@HawkFest]

Thank you! I've already used a multimeter for basic PSU checking (I've also did some welding for simple/obvious stuff), however I'm quite a newbie with electronics equipment... In regards to what you say at 17:20, would it be possible to use a oscilloscope instead of a multimeter for the task at hand? Note: thanks for your channel which I've just discovered : informal and relaxing, like a "hands on" on information...

[@namolokaman2393]

I like the technique of clearing the through-hole with tweezers! _"Brrrute forrce!"_ ... Not really, Sorin used heat as well. ☺ ...Have a good holidays, Mr. Sorin!

[@steves-gaming-uk8977]

I love your videos sorin but I don't understand why a workshop doesn't have a supply of components so when you've got a bad cap or MOSFET you can grab a new one instead of fitting one of wrong value or even missing it out completely weird ,just had to mention I only do this as a hobby but I've got sustainers of parts ready for when I need them keep up the good work happy holidays

[@rayofcreation3996]

Steves-Gaming-Uk exactly. Even I thought so.

[@garrygemmell5676]

Nah its simply poor customer service and attention to detail! At last someone else who notices his slipshod customer service skills. Have you also noticed he doesnt use a repair mat when working on mobile phones or laptops so could easily scratch the screens. He is no doubt a good tech but cmon thats Indian backstreet repair levels of customer service! If it was me I would also have brushed clean the inside of the casing not just blow it out. And smoking in the job my boss would kick my ass if i did that!

[@harryohanson]

Sorin, how did you get your multimeter on the laptop?

[@isidrotan7468]

Thank you Sir, learned a lot for this type of power supply. Happy holiday.

[@berbum4530]

I like the tools you are using! Good job pops!

[@Acesbomb]

New subscriber. Great channel, spent most of my day off going through your videos.

[@bolon8200]

thank you I just had one with the same problem they did not want to pay wasn't worth the trouble Edwin from NY

[@ziggyironic]

Once again, thanks for taking the time to make these videos and for sharing your knowledge.

[@Epasystemsroepa]

Salut Sorin! Felicitari pentru tot ceea ce faci! O mica observatie...spui asa..."usually I wil not fix the power supply on a normal desktop, just replace it because it's cheap"...a good PSU is not cheap at all, mainly from a branded computer...you cannot change a LiteOn power supply with a crap Delux power supply, or the same, for example, which is really cheap... Keep up the good work!

[@denzaharo9326]

Can you please recommend a multimeter, soldering iron, and magnifying mucroscope please . Thanks

[@Martin-ot7xj]

thank you for your useful tutorial video ...... i like when you show us your tools . and introduce new electric tool like doctor power , it was very nice tool for diagnose .

[@romaric207]

Hello sir Happy holidays Great job Watching from Cameroon

[@kblectronix]

I love the effort you make to do this, I respect that. But in 'school' terms could you just make it a bit easier to see your readings on the screen it seems to not work or not sure what bit we're supposed to be looking at. Also make it easier for your 'students' to make sense of the resulting info. Just a bit of teaching info, I have done it. Cheers. Kim@Lectronix

[@valentincorkovic6106]

Sorin, you are the repair MASTER!!!

[@phenos]

Good quality caps: Rubycon, Sanyo, Panasonic, Matshushita, Chemi-Con, Nichicon. Also acceptable: Samxon (exept GF series) TK, Taicon, Teapo. Motherboards need ultra low ESR model series and on power supply's long life high ripple rated caps.

[@bblod4896]

I hope you blasted out all that dust before assembly. Have a good holiday.

[@stefaancodde6578]

You should see the bios lines when booting up, unless the bios is set to a low time , the the fan of the cpu is not turning, the cpu is not destroyed, it will throttle down to a very low speed.

[@msaberi865]

it was not boring well done job my friend...

[@bill_r]

Sorin never turns down a chance to fix a power supply, brings out all his electronic juices.

[@mbg1668]

thank you Sir,your videos are great,have a nice holidays.

[@emvdl]

Thank you, great workshop flow 👍 Enjoy your holiday!

[@PHONE-LAPTOP-REPAIR]

learn alot sir..so thankful for this great tutorial pls more on desktop old types

[@samsonckalumbi2913]

hope, i will get feedback soon, i have a Lenovo ideapad 510 with a Nvidia GTx, it went off after i too it for check ups they told me that the motherboard is dead. It has a non-removable battery but they managed to open it up and remove the battery. they determined the CPU is where the heat is coming from, not the battery. With the battery removed, the CPU cools down, but as soon as they plug the battery back in the CPU begins to heat up as if the laptop is on. With the battery removed, they tried holding the power button for 15 seconds to remove any static. they also tried unplugging the CMOS battery for 15 minutes in case of BIOS issues. None of those methods worked and the symptom has remained the same. If battery or power pack is plugged in the CPU will warm up as though it is on. Any solutions to this issue? What could have caused this?

[@florianb.5783]

i think there is a short in CPU. probably no fix :-(

[@josepeixoto3715]

03:30 Hello, this will be unedited video, i will still post today , friday,yeah? before my one week vacation,yeah?

hi Sorin, as alwayas thank you for your videos and knowledge. This Power supply tester is only for testing voltage or does simulate some load too. I'm asking that because I have one that only measure the voltage and sometime without a load we may think that the power supply is ok. Best regards Hélio Cabral

[@shakeri_shayan]

Do More Desktop Repairs Pls TNQ Mr.sorin Have A Great Holiday

[@1johnmcmahon]

Enjoy your holiday Sorin

[@Bob-ll9jj]

Can you say something about adjusting the screen to your laptop? Is it possible to insert a screen with a higher resolution?

[@allanc7730]

I think, It’s not possible. Lcds and leds have different pins and cables. Using an external lcd or led is an option, but you need an addon videocard and a mini pcie to x16 PCIE riser adaptor to optimize the video quality.

[@em0_tion]

It's completely possible and i've done it a couple of times. But i know what i'm doing and why. I have a suspicion it's totally not gonna be worth it in your case though. Why do you want a higher resolution (in a 15.6" screen size i presume) ?

[@gordthor5351]

Why don't you use an ESR meter? I have seen many bad caps that aren't bulged and look fine.

[@Igot2fly1]

Bless you. That was a hard one, but I had faith in you

[@andrewyoung2415]

Watching you work sounds great with Opeth's Damnation album in the background Sorin :)

[@zx8401ztv]

Most main p.c's have psu failure, the capacitors just can't take the heat and ripple. It's the price we pay for using efficent switchmode psu's. Same problem with lcd t.v sets, dead switchmodes.

[@totalgaara]

I had to repair one of those kind of all in one computer with also a fan issue, it's was like a snail, can't find replace part so i had to deal with it...

[@chrischristensen8516]

Nice video, thx for sharing your knowledge. Have a nice weekend. Regards from Denmark

[@boisv4953]

Hello, How much volt & amp inject for 8 pin cpu connecter, (VRM short gigabyte desktop motherboard?) Thanks

[@ekuscotland8403]

How can I that type of soldering iron to buy?

[@Tomtech29]

So, the tester is useless why it was designed ? I wonder if he will behave like that on the new power supply I suppose that device should have its own artificial load. In general, a very interesting episode, I wish you a pleasant holiday on a vacation spending time with your family

[@xzoli8]

WE WOULD LIKE TO SEE MORE DESKTOP PC REPAIR VIDEOS, INCLUDING MOTHERBOARD REPAIR IF IT IS POSSIBLE, PLEASE 😁

[@curtismostert414]

Ant repair done on HP MicroServer motherboard?

[@hirwahubert3545]

Tkx sir Please we need more desktop motherboard repair

[@Martin-ot7xj]

please make a tutorial video only for using a multimeter and DC POWER SUPPLY? what is different between the multimeter and DC POWER SUPPLY? how we can find and diagnose the problem with each of them.

[@0dium.]

spoiler : an oscilloscope is a voltmeter, a period meter (inv. frequency) and across 1 ohm resistor you can measure current (current mirrors voltage) … amazing isn't ?

[@Liferoad371]

it was great to see u do Majic

[@BigLiftBoss]

First to do in this video is, checking the power supply, then moteboard

[@behzadsaboonchi]

nice repair ❤❤❤❤❤👍👍

[@bellslinki]

Awesome Sorin. Thanks

[@ultrashock3202]

In cases like thes all caps should be change nop?

[@Owczarekk]

Would love to see more desktops :)

[@weerobot]

Dr Power ,Cool looking kit...

[@em0_tion]

just like thermal cameras, it's really not worth owning one when dealing with consumer electronics repair.

[@khalkhal2372]

The oscilloscope takes a large part of the screen and is less clear

[@DumahBrazorf]

Sorin, you lost the challenge. You used a psu... tester!!! Btw, a bended paperclip to short the green wire with a ground one and you can power on the psu and check the voltages. A pair of old hds for load.

[@bolon8200]

thank you for the videos love them

[@capistor1]

Could you tell us about your camera setup? It will be of great help for those of us who want to start repairing channel.... Or any channel that uses an over head camera.

[@em0_tion]

Probably a GoPro with a hand band? :D

[@kadmaster]

Hello Sorin Come to Besiktas :)

[@Vinnie2x]

I love that your workbench is worn to s%!@. Shows the effort. Great work || Thank you for sharing your skills and knowlege!...turf that pre-HP boat anchor ::)

[@Omul1984]

Nu-i fac reclamă, nu o produc eu, dar este absolut minunată scula asta, pentru condensatorii electrolitici si nu numai, în sursele în comutaţie. Verificarea vizuală nu ajută la toţi condensatorii. www.olx.ro/oferta/esr-metru-cu-analizor-lcfp-miron63-incasetat-ID9VWRX.html

[@feritdincsoy4352]

happy Holidays

[@Igot2fly1]

This is so funny. I just repaired my first all in one. Over heating and found a bad capacitor. Repaired it with knowledge you gave me. Thanks. LoL.

[@thulinp]

I suspect that PSU fan could be dead too. Never saw it spin

[@J1media_24]

Good sorin watching from tanzania

[@MindYourBusiness1970]

Have a good time

[@harounsahnoun]

why did you use the oscilloscope and not the multimeter

[@danbeuscher9679]

He did so only because people asked about how to use it, to teach us.

[@jncyj]

does 1 missing pin on monotor vga plug not make pentium 200 pc not work but on windows 7 pc it does work why why not

[@Aneesh.Asokan]

One missing pin on VGA is default on all VGA male connector! It's normal, so don't worry on that!😀

[@abrahamsolomon1476]

It will be good,making another desktop motherboard repair using multimeter 😊😊