What you should check first on a dead laptop :)

[@klwthe3rd]

This is the kinda advice that really teaches you to think like a true technician. No fancy tools needed except for Sorin's massive brain. 😁

[@evananderson8452]

I want to thank you. I took your advice from one of your other videos and it saved a laptop I own that I thought was ready for the trash. It's working again probably for many years or longer since it was functionally replaced years ago and so will not have a heavy usage put upon the machine. Thank you Thank you

[@6o250]

Hats off to you sir you are a genuine employee and a very valuable asset to the company you work for, owner/owners should lock you in their possession for good and never lose your services. Very informative Channel keep up the good work

[@ivanzsar]

I see Sorin videos, I like.. Sorin gives me more confidence in establishing my own Repair Shop.. I'm now into process of acquiring basic tools and softwares that I need to perform such task.. Thank you very much Sorin!

[@TheForexplanet]

Excellent Sorin, so simple but most people miss it. A great video as always.

[@eriakup]

Hey am new on your channel. Am African and your lazy way of talking was driving me up straight walls but after watching your clips over and over, i got to appreciate it. I think you are crazy to be repairing mobos but heck! If they work, who cares!!!! lol Much luv rusky. You are a good man. Will always stay close and make sure i pay you a visit some day. You have changed my life a lot! lol

[@MrRvdbeek]

Always testing the charger. It’s the way to do it and it coming on instantly. Thank you it a great video it will helping a lot of people

[@poloemilien4858]

Intresting. As for any diagnose, the SIMPLE way before. Charger, Ram, HDD. Wait for the video tutorial of the mod of the linear power supply now :D Thanks Sorin

[@paulcartlidge4194]

Hi, just found your site and wanted to say what a great video and a wonderful way of presenting no bells and whistles just as it is . I have subscribed and now have lots of videos to catch up on as my laptop has just died and I am a beginner so will be interesting .

[@craigfinesse772]

I watch your videos every day...i really appreciate the advice and ideas you share.

[@XLR8RRICK]

You have such a dedicated following for your videos, even the 2 dislikes are very dedicated they never miss a video. 2 Thumbs up.

[@faizelosman3462]

Haha well said!

[@danbeuscher9679]

I love the way you simplify things.

[@SingularityRS]

Same thing happened to my sister's old Macbook. One day it just completely died and wouldn't turn on at all. No LED on the Magsafe charger. Just completely dead. Bought a charger from Amazon, plugged it in and the Macbook now works. Sometimes the simplest things can cause what looks to be a more complicated problem (dead or unstable device). Gotta start with the basics before moving on to more advanced stuff. So far I can only troubleshoot basic problems (that don't require e-surgery). The more advanced stuff, such as board repairs, are out of my skill set right now. I hope to one day comfortably be able to move on to the more advanced stuff. It's fun taking something that's broken and watching it come to life.

[@margyjr]

another great learning video from Sorin!

[@PerrynBecky]

That's a good thing to look for. Thanks, Sorin.

[@KEYSTONE223mobile]

Hello, And thanks for your time to do these videos. Lots of great Contents,and good stories during the repairs. . .Keep up the great work. . Thank You Much

[@igwejohn5626]

Thanks so much It is actually helpful to me

[@NANO-SERWIS.MAREK-DASZKE]

Sometimes the charger has the correct voltage, but under load the current drops sharply.

[@josepeixoto3384]

eh,eh,eh, the voltage drops too;

[@leonconaway8942]

If the voltage isn't the same all the time then replace your charger!

[@willhelmx8388]

Hi Sorin, here at our lab we stick the charger on the Electronic Load, then we have this controlled directly, but thats just because we have to fill in this form for the customer, otherwise for the most guy´s here like you say, get hold of a few chargers, fleemarkets have loads of them for small change and have them handy to test with.. :-) Have a wonderful day you all BR / Andy Ps. was looking at the other comments... ofcourse one can make connectors for the powersupply directly, and its a good thing, however if you have a bunch of powersupplys, then you immedialtly have a used one to give the customer - thus a quick solution :-)

[@TFT_JOURNEY]

Sorin make a video with that charger how you can fix a fault like that..i'll be glad to know how you fix it..please do a video on that.tnx man

[@qwertzuiop7741]

Problem is opening of that thing. Cases of chargers like that are either glued or sonic welded. If you get it open, you can check for obviously leaking electrolytic capacitors. If you find them, you can replace them, and - most probably - you will have working charger. With broken cover, which is the reason nobody in first world will bother with repairing it. Edit: Yes, it is definitively possible to repair it, and usually quite easy. But these things have mains voltage inside, and you don't want to give a mains voltage device with broken cover to a layman paying customer. New one (offbrand) will cost like 20 quid.

[@ThomasEnder_pt]

After opening it he can glue it with hot glue

[@h0ll0wm9n]

Great video! 95% of those adapters can be fixed replacing an electro cap. Take it apart, use an ESR meter and check. Replace with 40 cent cap.

[@carlosraaul1407]

Sorin thanks for sharing i found this very very useful. I admire what you do.

[@rajeshkumarbehera9275]

You are the best to teach electronics..

[@02sector]

This was a bit funny because of the fact that you had to realize that it was not plugged on. it's understandable because you do this every day and yes.....sometimes its an issue for everyone of us. Anyways, Thanks for the advice and thanks for sharing your knowledge with us. Keep up the best work you do :)

[@zjebowita5000]

yep, many times someone sent me tablet or laptor including almost dead charger, problem is when you don't hav laboratory power suppy... how to get non standart laprop charger? - make by home method transformer :D... on laboratory power suppy you just set exact voltage and setup amps, thats all, and device should start, if not, than FUN JUST STARTS :)

[@DetermineLyngdoh]

New fault we learn today. Can we get a lesson on fixing the charger?

[@BilisNegra]

@Michael Bishop Well, that's OK if you're curious, but I doubt it makes economical sense to recap a power supply (unless you just replace one single one that's blown up

[@Passco666]

buy new one.. you need to destroy.cover and some white "silicone'

[@freddiemortos8519]

Sorin, what i'm using to check the power supply if it can still deliver the needed current is by using ang adjustable current dummy load.. Or if i'm lazy i'm using a bulb to load the power supply then measure the voltage while the bulb is connected. If the voltage drop too low i know there's a problem with the power supply. That's how i check the current.

[@vasilispapas482]

I think that the first think you mast check before trying any repair is the cost of a new purcase , as in a lot of cases repairs are posible but are not recomended because the cost of them is higher or near to cost of a new one. On the other hand repairs which performed without using of original spear parts are more emergency paches and less official repairs, as none can warranty about their last lifes or if the machine will work properly in the future. These practice are very usefull if you want to indentify the problem and give to customer a real report about the reason which cause the problem.

[@hi-bl4pf]

My laptop was drained i water when i was sleeping and its not opening my carging light only shows red and white

[@hi-bl4pf]

Can it be fixed?

[@jackgarrison8497]

@@hi-bl4pf I know that this Video is really old but if You are trying to Say that You accidentally poured Water onto Your Computer in Your Sleep I'm not A Complete Expert but it sounds totally fried to Me but I don't know how to fix Computers so I don't know if anything can be done

[@Umski]

First question I would ask is 'was it powering up with just the battery' if it was used without the mains power supply - helps to narrow down if it's a power supply issue or not (provided the battery is charged of course!) - if you don't have access to multiple chargers etc, this is an easy check :)

[@danielalin76]

I had the same issue with my laptop and I fixed it by changing the charger. Now it works fine.

[@neverknowit11]

hard drive controller not enough current to startup it up correctly. Power Supply

[@zoltankarahuta668]

the BIOS should start regardless of hard drive, or hard drive controller

[@jungha496]

@@zoltankarahuta668 Yeah! The bios should come out regardless of any possible hard drive issues.That's why people tend to remove the hard drive before inspection, and then change the ram to see if the bios can come out.

[@Oak690]

Charger has to be able to provide enough power to run the laptop. The voltage of a malfunctioning charger can measure good with no load (unplugged) but can collapse when plugged in and loaded. I purchased a "broken" laptop once that required a 90W charger but the person who sold it to me was trying to use a 45W charger with it. It worked perfectly once I used a 90W charger. Not enough AMPS! :D

[@Jotainkivaa123]

I have an old Vaio, it had sat in a shelf for like a year. Yesterday I plugged it in, the charger let out smokes. It had some slow down and display issues, didn't suspect the charger >.

[@PHONE-LAPTOP-REPAIR]

thank Sorin...this is a short video but the lesson is bigger ..other thing still enjoy and learned..additionally pls make troubleshooting video on the charger...

[@bryansedibe8732]

Great video as always.

[@ggppdk]

Why not test charger under load ? What about connecting an 100 watt 6 or 8 Ohm resistance on the charger output (only for a few seconds if you have not mounted the resistance on a heatsink) and measuring with a multi-meter if the voltage is being decreased considerably ? Also a cheap oscilloscope could be used.

[@anthawny]

Thanks Sorin, Ive never watch this video... this is great!

[@retrocomputinggrotto]

This is why at work we try and buy the same brand of laptops and keep spare power supplies as it's so quick to rule out a charger being the issue or not :)

[@samsulblack982]

How to repair the weak VGA. The case when it starts to go into the desktop suddenly the laptop shuts down. Sony vaio

[@marko176schneider5]

Super Video.Danke!

[@tington874]

Hello, the best way to test a laptop power supply under load is to connect a pair of car's 12v halogen light bulbs in serie 24V is close enough to 19V to have a good idea of the power sustain.

[@weerobot]

More Cool...You make it look easy Sorin...

[@Dr.muthanna]

Nice new lesson, thank you Sorin

[@Martin-ot7xj]

Hi sorin, please make a video about power supply and power rail on laptop Mainboard, what is diffrent between them? Thnx

[@yepdosinteherve2683]

thank you sorin

[@AMNOWTECH]

Great Mr Sorin

[@danielnight5717]

So the best way is buy all Male DC Connector and test laptop with a lab power supply.

[@skumbag7735]

kinda sounds stupid but it's not i guess

[@endy797]

Most common problem for old Sony Vaio was when they overheat desolder the pins on CPU every time you need hot gun to solder back and if heat again you need to do again. That was low quality solder used by Sony what I remmeber 400-500C melting point.

[@milvolts1]

I messed up my laptop. Using a boost converter without a fuse. Something in my laptop popped and now no power. What could of popped? A capacitor?

[@rokasbravo9714]

that interesting, never saw that kind of issue... i would tell its motherboard...and i be wrong... nice

[@detodounpoco2381]

hey, I used to have HP laptop with the same issue, I found out it was the wire inside the charger cable, it was making shorts, I saw it when I went to turn on the laptop and the room was a little dark, then I saw this spark coming out from the cable charger, got fixed it

[@HePBHuq]

Had some deals with bad chargers that have voltage, but when plugged in a laptop voltage drops to zero, laptop goes off, but cant sustain the current. Edit: you just said the same thing, while I was writing this comment :D

[@Hadadoh]

Ram or some auxiliary power short 😜😃 Not sure...

[@VKTricks]

Nice information

[@iddqds]

i was going to say the battery might have problem. happens with satellite laptops.

[@MindYourBusiness1970]

What about a current clamp should we try with It or It does not work , if not why?

[@brk932]

Current clamp would work if it is inductively "connected" (coulped) to the circuit loop but since the ground/negative and power(positive) wires are not separated and follow the same path also the grounding usually shields the power wire. So NOT with the stock charger. Some clamps can't measure DC and most are quite crude with small currents. DC clamps use Hall effect sensor to measure the magnetic field created by the flowing current. If you can split the wires you can ... but why not use a power supply with a built in ammeter?

[@MindYourBusiness1970]

@@brk932 got it thank you

[@alexmanning889]

I have about 6 laptops here with issue I can’t repair. I’m still learning about motherboards but I hope you can help. They power on, lights come on but nothing on screen. Then power light goes off.

[@brk932]

Stuck head on the HDD? If it is a beeping or clicking noise.

[@jpius1017]

Plz make a video on how to fix that charger

[@almamunrubel7053]

Very good lesson i learn from you.Thank you very much for tech this type of lesson.

[@Ali78sixx123]

If i were you i would have reflowed the graphics chip and wrecked the laptop😂😂😂😂

[@alcojigmpfi]

What should icheck if the voltage after the first mosfet is 18 v

[@themolka1]

frozen bios or ram

[@rudysmd7350]

Congratulation 100K sub 👍

[@britishbanglabb9576]

Hi I have a iPhone 7 plus its look like water damage but it's turning on and asking to join iTunes and reset and I try to reset but it's showing some problems some where, what I can do? Any suggestions. Thanks

[@torem2538]

Hehe, almost messed this one up with unconnected mains and wrong dc output. Nice video anyway.

[@ninshowplays52]

Very nice ... i learn a lot.

[@estherjohnson1181]

Hi sorin is possible to buy a Acer aspire f5-571 moder boad from you and what will be the cost.thanks

[@WencelPlays]

I wish I could bring my laptop to your shop

[@gaizeraguilar3377]

Noted sir.... Tnx for ur teaching

[@MrJdeb79]

The charger may not be providing enough ampere but voltage is adequate........ so is there a way to check the ampere output of the charger....

[@Shay4383]

But if the screen doesn't go on, even without the charger (only full charge battery), then how come it's a charger fault?

[@vincepirozzi9603]

You could check the charger with an electronic load device. Then you can see what kind of a load the charger would handle. It

[@selvin9845]

Great video, thanks

[@zx8401ztv]

Replace the two low esr electrolitic capacitors connected to the double diode output. Don't waste a usefull test supply :-(. Shorted plug or cable is the most common for me to see.

[@sayedwalidchekhansoori6111]

I have a Lenovo y50. it has a problem with charging. when it is turned off it is charging but when it is turned on it doesn't charge the battery. can you help me with that

[@husbyugur77]

cement thermal compound and frozen bios cms reset :)

[@richardcranium5839]

i have read older dell laptops even with a good charger will not work if the battery is bad. is this true??/ and why so?

[@adrianbadea1179]

Trebuie sa incerc cu power supply...am un Acer aspire cu touch screen...

[@margyjr]

so it should start OK when just starting off the Battery ???

[@lapdeskhrwallwk6340]

sir i help me, laptop no display case ? how to main main check in laptop. vcore volt check mainlly for why vcore volt important

[@dipankargiri9105]

Sir which instruments do you use please tell us I want to buy those

[@ThomasEnder_pt]

Can you please open to see what is wrong and how to repair it? Thank you for everything :)

[@rollycanales1155]

Thank you, another very useful tip.. :)

[@erakan6121]

Let’s see, what can you do with all these broken chargers? A charger fixing marathon, yeeeess!!!

[@marians6490]

My laptop was doing the same But the fault was the video card Emachines E642

[@Liveables]

How do you check current

[@1matejus]

Check power supplay with electronic load supplay current

[@wepipe]

if the laptop's battery pack is charged up, then it should run ok on the battery . Yes ?

[@qwertzuiop7741]

If the notebook was used as a desktop, and connected to its charger for five years, battery is probably completely dead. But othervise, yes it shoud work on battery with charger disconnected.

[@ravindraadapa2952]

TQ for your good video sir

[@lizardltd]

What if I can go to the bios, but I can't boot into anything?

[@Eric-ip8hy]

I would always use my own charger because i know it is good. If it still would not work i would check the memory after that i would tell the customer that it is a faulty motherboard and see if he want me to repair it or whatever

[@BattleStandardPainting]

Do you have any experience with Lenovo y50-70 im looking for some assistance

[@miloud-en]

Very nice advice tnx

[@hifi-service]

thanks for all video

[@JERELSALSERO]

I dont understand, i have dead one vaio, incl blue ray dvd writer, all others o.k. do you like to buy?

[@jesusimasalazar3966]

Hello there, I have a problem with my Dell Inspiron 1440 it won't turn on i have a good charger please give me some advice.. thank you.. :)

[@ingejeppesen1358]

You should allways load test it. This is the most common trouble shooting fault. People unplugging connectors, checking voltage, plugging back in. This is ohms law. There is no voltage drop if there is no current.

[@zen_gaming6468]

I gotta sub

[@techmonster2632]

How come this happens have voltage without current

[@johareymacapundag7609]

the CPU of my laptop is probably fried because i've been using it not knowing that there is no RAM installed in it and now it wont power on or even charge.. how can i fix this? can someone give a tip.