Dell E6430 - Motherboard repair - Lets learn a quick diagnose method

[@tobiasmangoma9566]

Sorin, I wanna thank you for your videos. Just yesterday I fixed two dead laptops using the knowledge I got from your videos. The feeling is crazy. I have been paying a lot to other technicians to fix laptops for me but now I can fix other problems on my own. Are you dodgey? I don't know. All I know is I am becoming a real technician by following your videos. Thank you.

[@iamhamzamalik]

hy there can i have your whatsapp number please need your help

[@marcumihai5079]

The old-school method of repairing every electronic device. I love watching your videos. Greetings from ROMANIA to Mr. SORIN

[@baya24]

Just repaired Asus ROG's battery "not charging", tnx for lessons from all these years that i learned of your tips. Best regards from Croatia !!

[@sergelavallee913]

Mosfets are at the input of the laptop because the laptop has power internally, it might send current back into the charger if you don't block it. So when the switch is off, it blocks both current from the charger into the laptop and from the laptop into the charger. On a PC, MOSFETs help make up the VRM (voltage regulator module), which controls how much voltage other components on the motherboard, like the CPU or graphics card, receive. PC components like CPUs and graphics cards have strict operating voltages, so a motherboard’s VRM helps make sure this isn’t exceeded. MOSFETs are important to VRM functionality and have an impact on the amount of heat being generated by a VRM while it’s doing its job. MOSFETs can get quite toasty if you’re using a powerful graphics card, and a motherboard’s heatsink helps cool the MOSFETs and, thus, the VRM. In addition to keeping the overall system safe, keeping MOSFETs cool is also important for any type of overclocking. How Do They Work? MOSFETs are like switches that go on and off based on a signal from an integrated circuit (IC) called the PWM chip / controller. MOSFETs switch on and off quickly, allowing high current to flow through in short bursts. This, along with other parts of the VRM, controls voltage sent to other PC components on the motherboard.

[@electronicengineer]

@Fluke Whisperer Metal Oxide Silicon Field Effect Transistor. Bet lost!

[@sergelavallee913]

@Fluke Whisperer You're right!

[@sergelavallee913]

@@electronicengineer Exactly and it's not in there for fun.

[@thingshappen9199]

Does anyone have any idea as to were i can find some of that film/tape that Sorin is peeling back at 12:43? I restore old laptops as a hobby and sometimes that film is worn out so i need to replace it.

[@eazthitman]

watching this is surprisingly therapeutic :)

[@thingshappen9199]

except he said he was putting a little bit of thermal paste and then preceded to smother the CPU and GPU with a mudslide of paste. LOL

[@stevegee58]

I just told my wife it's like watching Bob Ross painting.

[@aw0718]

You make it look so easy to find that bad cap!!Same fault i was spend all day to find it!Thank you Master Sorin!

[@steveb1706]

Regarding the screws, I normally use cheap plastic ice cube trays to keep them separate for each area.

[@googacct]

I like using the small 30 day pill trays.

[@jamich1]

@@googacct in which one do you keep XANAX :)))))))))))))))))))))))))))))))))))))))))))))))))))))))

[@bernardvermeulen8031]

Good idea👍

[@KBez-op4wk]

Also a good idea is: Toffifee

[@FrazAhmad24]

Wow, this is called expert who knows his stuff. I opened my laptop thinking I would put new thermopaste and make it faster. I used airblow duster to clean up the motherboard etc. I put back everything it doesnt turn on. Took it to mechanic and he said I liquid damaged the motherboard. Cost me $230 to get it repaired.

[@gordslater]

FLIR cameras are expensive if you don't need them very often, but you can modify a infra-red thermometer gun by gluing a short length of tube over the sensor to restriuct the angle of view, giving it more of a telescope effect. Then you scan the tube end over the board and susp[ect compnents while you watch the temperature display. Or, do like I did in my teens - use your forearm gently to see where the heat is (AFTER checking that nothing is 100 degrees C+ with your fingertips - you can see him do this around 15:30 and he jumps when he feels the hot one. A third way is to brush isopropy alcohol over the board and see where it evaporates fastest. - he does this at 16:40 using Zippo Lighter fluid Feed a few volts (current limited to maybe half an amp or so) into the power jack rather than use the laptop's PSU, becasue the laptop PSU will crowbar due to the fault remember. I prefer to use a lower voltage at first, then go to the full 19v or so if nothing smokes ;)

[@KBez-op4wk]

or you buy an smartphone with build in FLIR such as CAT S60

[@em0_tion]

@@KBez-op4wk That's just stupid, why would i waste money on yet another equipment, when i can just use easily obtainable consumables from every corner of the world. What happens if your CAT dies on you? You stop working on shorts until you fix it? No thanks... K.I.S.S.

[@wefukthenwo]

Good work. There is no sin using a thermal camera. The technology is there to be used. It saves me time but there have been times where it has run out of batteries and then I fix it manually.

[@andrewyoung2415]

The screws on these models under the bottom access cover have a "P" on the chassis that tells you they have to be removed to remove the palmrest. Dell do make it easy in some ways. I love working on them.

[@ivanviduljevic]

Sir, it would be awesome if you deticate youre time to make a video about voltage injection tips and tricks, and what to avoid when using this technique.

[@sayf_Allah_lmassloul]

You are genius Sir ! I have the same issue in my laptop , thanks man

[@aminetlija1925]

Thank sorin..you are really a great teacher

[@Max_Mustermann]

True, these old Dells a real pain to disassemble. In order to replace the fan on my e5430 the whole laptop had to come apart and the motherboard had to be removed.

[@diacomservice]

Thanks for video. I would have some advice. if there is no thermal camera . you can use a check paper or flux. if there is a short circuit, at least 1v must be given there. because if there was one mosfet short circuit, not a capacitor on the motherboard, the 19 voltage you provided would go directly to the CPU or CPU or chipset line.

[@rich6245]

Good videos. Interesting to see the problem solving aproaches and thinking. I fell the fixes are sometime a bit too quick and dirty for me. Maybe good enough to allow data recovery but not best practice. I suspect removing capacitors will not be high on long term reliability. Then again even Dell's reputation in that area has become rather tarnished. Thanks for sharing.

[@kevinmoore3915]

Thank you teacher Sorin for another video!

[@winrarwin7924]

Thank You Mr. Sorin,.my laptop Dell 6430 it's fixed now,.thank you very much my teacher. GBU

[@0beejay]

It's like when you go to the dentist and he takes out the wrong tooth! I can't stop laughing 😅😂🤣

[@jtid5670]

me too :D

[@peekpt]

Strange tastes 😂

[@MrRvdbeek]

You can’t solder the tooth 🦷 back😂

[@bernardvermeulen8031]

@@MrRvdbeek but hot glue can help 😜

[@tobiasmangoma9566]

@@bernardvermeulen8031 Yessooh, we can just use hot glue. Sorin is just great

[@giorgostexnikos6976]

thenks professor.nice video.nice diferend diagnose .more like this please.

[@cbrunnkvist]

What you should buy to accompany that electric screwdriver is a magnetic tray / bowl to keep screws from running all over the place, potentially disappearing or getting between the device and the tabletop causing damage

[@bahadoromid3554]

Very good Sorin .Thanks

[@sayou13014]

Thanks for this video Sorin. Very interesting like usually

[@arayca584]

greetings from honduras master Sorin i like your video best of all i learn alot and dont even think on become a dentist

[@emmanuelamaechi5877]

Good day sir, it has been a wonderful moment watching all the videos of your computer repairs, you are really a genius in your work. Sir may I request for your e-mail

[@thebeatdown2644]

What electric screw driver are you using?

[@rhabblestechnologyworld870]

"It's like when you go to the dentist and he takes out the wrong tooth" hahaha i really love your videos...am learning alot thank you and may God bless you

[@silentsniper9531]

Hey, I have a laptop (Dell E4570) with a burned IC on the motherboard. How can I find out the name of the IC to replace it? I don`t know where to look 😅

[@franklinvaz8700]

well explained, amazing knowledge sharing, keep on going..

[@therealspixycat]

Instead of a thermo camera you can use a laser temp meter. With this you can scan an area and see the max temp encountered while pulling the trigger.

[@davidbolha]

Those eBay ones right ? 😄

[@sblitz5565]

Is this method work for phone board

[@Martin-ot7xj]

Hi sorin, please explain more about power rail, what is power rail on mainbord?? Kindly make a tutorial video about power rail and how we can recognise that. Thnx

[@Swenser]

Sorin. Hope after a hard day's work fixing electronics you can relax and switch on BT Sport channel. Women's Aussie Rules football starts tomorrow. Greetings from Melbourne.

[@esoxhu]

Hi, Nice video as always! I have a faulty DELL 6420 C96Q5R1. I think I killed two usb ports on the right with a bad service cable during phone fastboot process... Anyway, it's not starting anymore. I can enter the bios menu, I can use the 3rd usb port on the left for a mouse. I can see that port is functioning during boot process, but the notebook is stuck after selecting boot device. Empty screen...nothing else. I trled with battery off + charing cable. I also tried with and without harddrive... What should I check? Tibor from Hungary

[@m.mlf.b3680]

really u are extra technician ,i have seen your tutorials (your amazing videos). its so important to me... thank u sir.. i have dell latitude E6420 laptop here.but once upon time it suddenly fails to start up...i'v tried some times.here these are its problems 1.when i press power button its shows light on then immediately turn off. 2 when charger is plug on the charger indicator shows light on and after 2 or1 second its turns off (charger cant charging here).3 the laptop cant start on...so please help me as much as possible if u don't mind thank u

[@wienekaazrarahayu4200]

Hi Sir, i'm your subscriber from Indonesia, i'm using this model to, i have some issue for little electric shock in the side of palmrest specially when charging this laptop, my i know what is the problem and your advice? thanks in advance sorry for my english....

[@peekpt]

Everyone saw the screw falling 😅

[@bernardvermeulen8031]

And Sorin doesn't Care, if I have a falling scew I look for it immediately 😛

[@kx5449]

@Electronics repair school Hello,your series is great! thanks for all that awesome info, on my E6430 my internal microphone jack is broken by inserting a microphone in a unlucky angle, the think is bend and probably broken. Could you please show how to replace it/fix it on the E6430 that would be awesome and thanks again for your videos!

[@AnonymousRepair]

The 2 mofets from the input is to protect the battery to get 19V when the charger is plugged in, If you don't have the 2 first mosfets you will have battery voltage on the charging port , Yes the battery is protected but what happens if that fails ? Yes it has a fuse but you would eventually kill the battery

[@serwiselektroniczny8966]

Please give me a information how to fix a problem with sound on E6430. My speakers are dumb. Audio drivers (on Win7) are installed properly. When I use right key on speaker icon and i choose option 'playback devices', I see LOUSPEAKERS and COMMUNICATION HEADPHONES. While playing any sound, at right side of 'speakers' shows green 'sound indicator' - it is ok. The speakers gives no sound, but if I use option 'test device' on 'communication headphones' i can hear normal sound for the duration of this test (about one second). I tried also in LINUX, there was no sound.

[@marko176schneider5]

Super Video.Danke!

[@arbcoll]

HP Probook 6560b power led and caps lock blinking continously. Researching in the internet, it is indicated that it's the motherboard issue. Any experience with this?

[@kashi658]

Very informative video

[@Martin-ot7xj]

When we want to use power supply to check short on mainbord, we must put plus on first mosfet?? And check the which capasitor get warm??

[@jamich1]

just make sure you know what you are doing Sorin said cos its easy to burn something. Be careful where and how much voltage a amps you put in the circuit. Its not always 19V.

[@cyberpub8630]

And also what about thermal paste.. which one are u using .. i do have one with white color

[@eng-zaniar]

Thanks Mr. Sorin d=from Kurdistan keep it up

[@bardos]

Very nice, as usual

[@cyberpub8630]

Let me know sir.. which electric screw driver are u using to unscrew laptop..i need one..

[@filmwatchatthemovies]

Thanks papa, I have this same laptop, when you press power button, battery brinks orange 4 and 1 white pattern, but wont turn on. When you press the button again the fan rattles and shuts down, still no power on. Have you ever fixed a dell of this problem, if so please link me to the video. I can't come to you am in Africa. Thank you for your videos again.

[@mr.gautam8869]

i have acer 5738 and cleaned it after that its get shutdown abruptly after 10 to 15 min. i haven't change the thermal paste .does thermal paste is not working . i had cleaned it because it shut abruptly in 10 to 15 when using internet but running normal for hours . i am confused where the problem is

[@allymnenga1126]

What if the LED in the adapter keeps on blinking after plugging in the charger, how can I tackle that problem in dell latitude E6420?

[@trgrtechvlogs]

sir gooday i have same laptop no display hdd led blinks and wifi charging stays light what is wrong? thankyou

[@EurekaRecycler]

HI, do you clean the ribbon cable with lighter fluid? Thank you

[@m.mlf.b3680]

my laptop is Latitude E6420 when i press power button it immediately power on for 1 or 2 seconds,then shutdown itself and also when charger is plug in it show light and immediately off,it show short sign how i solve it..???

[@vashstampede4271]

how can i do that technique the touching technique? should i plug the charger in so that the bad capacitor will heat up? it is safe to do that? will i get electrocuted?

[@The_fappening]

No the charger stops the short

[@thingshappen9199]

Does anyone have any idea where can i find tape/film like the one he's peeling at 12:43? My hobby is restoring laptops and sometimes that film is worn out so i need to replace it.

[@jamich1]

aaa we dont have to put back that capacitor, it will be ok dont worry :))))))) love it

[@jorgeoyuela7161]

Do you know the specific capacitor that he replace?

[@jamich1]

@@jorgeoyuela7161 Hi, no i dont and he didnt repace it im sure of that;) He only replace cap if really needed but normaly he does not replace them.

[@jorgeoyuela7161]

So he only removed it?

[@jamich1]

@@jorgeoyuela7161 yes

[@gordthor5351]

jamich1 I would worry because I want longevity of the repair. Capacitors are used for a reason on power supplies. I waited too long to repair a desktop power supply that I knew had bad caps and the dirty power (too much ripple) took out the video card and killed a small cap on the motherboard. Maybe Sorin's reasoning is that there is still one cap left that was in parallel with the shorted cap, but if that is the case one cap failed when two were sharing the load, so one likely won't last long. Just because something works, doesn't mean it is working right and will have longevity.

[@TheMausebert]

Have you ever set the petrol liquid on fire by sparks from shorts?

[@sabjvc1]

What is the name of the petrol you use to detect the short, it's isopropyl alcohol?

[@The_fappening]

Lighter fluid

[@Porfirio.D.1965]

Sorin, what is your opinion about that thermal paste you're using, the Arctic MX-4? Thank you.

[@em0_tion]

It's the best thermal paste for its price and performance. This is what replaced the legendary Arctic Silver 5 and thankfully corrected every single flaw it had.

[@martijn4740]

great video Sorin yea the Dell laptops are prety easy to diagnose yea thermal cam is awesome got me one on ebay for 150 euro not to bad was a real good deal

[@Infiniti25]

Martijn V what brand and model you get?

[@martijn4740]

@@Infiniti25 Flir one android version

[@petejackson7976]

Where do you buy your thermal paste? My last 2 nt-h1 paste from ebay have been fakes. They acted more like glue than thermal paste, because the heat sink came off with cpu. Sometimes the laptop boots and shutdown a few seconds later or it doesn't boot at all.

[@petejackson7976]

@@danielsatko-, I bought grezzle from PC world , that too did not work.

[@legendszone4417]

Ur a funny tec mate i ever seen on you tube dude i like ur videos

[@Mrnoor-ch2ss]

Hay ... I have a problem similar to the same model, the device suddenly turns off and works shutdown without command and it works again without any use of the power button .. then the device I cannot use because of this problem This problem is repeated if it is connected to the charger or to the battery

[@zx8401ztv]

Well done :-D, the lighter fluid is handy.

[@bretmutasa2676]

My laptop keeps turning off by itself after about an hour of use. Then, it won’t turn back on until it’s been left alone for several hours. What could be causing this?

[@LordAnubis0909]

how would you find value for that cap if you had to put it back?

[@Infiniti25]

LordAnubis0909 from memory what I learned with all the helpful people on the Discord server most of the time it's ok to just match the physical size of the capacitor.

[@funnboy84]

Am un laptop defect și vreau sa il trimit la o diagnoză.cum pot lua legătura cu dv?

[@johnm4962]

I love this show !!!

[@meRnn]

exellent work, thanks cap

[@freddiemortos8519]

How much did you charge a costumer with that kind of fault?

[@einfelder8262]

Construction of the Dell laptops is very solid. Businesses held onto these for 7 years, bad for Dell business.....

[@em0_tion]

How so? They costed (starting from) around $1500. That's not bad at all for a one-item sale. They knew what they were selling and smart people knew what they were getting for their money, fair game.

[@einfelder8262]

@@em0_tion Hmm. Finish your business schooling first.

[@em0_tion]

@@einfelder8262 Guess your business "schooling" has made you way smarter than Michael Dell or you're just a greedy douche? Hmm.

[@JoeyRivers]

Perhaps smaller businesses might, but larger enterprises and government departments often buy large numbers of laptops usually including a service contract which might be say 3 years. After the contract is over they are decommissioned and replaced by a new model and contract. It is quite common to see hundreds of these types of laptops (Core i5/i7) then end up in auction houses (eg: Mayson Gray Strange here in South Australia) and you can usually pick them up for $100 or less. Many units often show little use and are in great condition. Unless you have an expensive laptop that needs repair or are particularly attached to it, often it's cheaper to pickup something like these instead of paying more to have a faulty one repaired.

[@em0_tion]

@@JoeyRivers That's the best strategy til this day. Another plus is the older architecture, which allows you to not be bound to Win 10.

[@neildelgado3054]

Very good!

[@boniamar1661]

Can i use the pétrole of cars if ihave not a zippo petrole

[@WHOcARE3000]

Sir my charger don't go off and my laptop can't turn on, what happened ?

[@tiagojsky]

You are the best, told ya before, 🙏

[@Martin-ot7xj]

Where we can order your electric screw driver??

[@KBez-op4wk]

Same or maybe similar a.aliexpress.com/_U56G0

[@muhammadshoaib6938]

Nice video & Thanks

[@Onudasatooshi]

The capacitor you took out and did not replaced was not a power capacitor ,if it was you have to replace it

[@jarnovilen5259]

Use Isopropyl alcohol instead. It is more exact and faster way to find the short.

[@bardos]

Sorin explained one time I think why he prefers the lighter fluid. Something about it leaving a protective oil residue if I remember correctly

[@bblod4896]

Funny, the screws were rolling away like rats leaving a sinking ship.

[@jamich1]

:))))))))))))))))))))))))))))

[@kztech1319]

For these business class laptops, if you don't know what screws to remove or put back In, see the service manual

[@satriorudi3742]

Every type of laptop power 19v reel indicate by big capacitor or not and why u not replaced the capacitor itsnot effect to laptop performance

[@Infiniti25]

Satrio Rudi some capacitors are for filtering noise out of a circuit so attach to a line on one side and ground on the other side of the cap. Do t forget these laptops are designed to work anywhere in the world and you just need a different charger wire that plugs into local mains socket. Not all power grids are made equally or there maybe lots of construction equipment affecting the quality of mains power. This means circuits need to work in a vast array of operating conditions and caps like that are put in for that reason. Sorin knows that the quality of UK power is probably better than 75% of the worlds power and that it doesn't need replacing.

[@Grinder-one]

Please don't become a Dentist Sorin :)

[@bernardvermeulen8031]

I would think twice before I let him do thé job, hot air, hotglue, flux, zippetrol, no not be come a dentist Sorin, stay electronics repairman

[@Conservator.]

He’ll be like - No you don’t need this tooth - No you don’t need that tooth - you’ll be perfectly fine without it.

[@bernardvermeulen8031]

Even better 😭

[@gordthor5351]

@@bernardvermeulen8031 Haha! "Oops I removed the wrong tooth, just give me a minute to get my flux and hot air and we will quickly put that tooth back in".

[@bctoner]

Well done

[@PrasetyoMuhammadDwiBiology]

12:40 if you want to go direct diagnose

[@Jack_Mototech_Vlog]

Very easy to fix

[@ДеянГ]

Hello. I am watching your all videos, I have 1 issue. Can you give me advice - I have laptop when is off consuming 0,24 Amps from power supply. Laptop do not start. Greatings from Bulgaria. My name is Dido.

[@SamSung-rx6fo]

Sorin you drive me crazy the way you toss the screws around on your desktop which of course shows people how experienced your are at opening and closing an diagnosing a laptop fault in record time. We amateur DIY people panic when a screw go's missing.

[@Franksxs]

Nice video!

[@oualidpro8427]

i have acer aspire 7741G i dont know how but bios on usb to flash it can u help plez

[@AnonymousRepair]

Try this: community.acer.com/en/discussion/377621/acer-aspire-5349-bios-recovery-rebuild-method

[@sumonalimy]

U r really great

[@deankay4434]

As an automotive service tech (ASE Master) I have used thermal transfer grease on many ignition modules as they can switch thousands of times per minute during higher speeds. Is it a little expensive where you are located? I guess I don’t know where you are located but your speech accent is hard to pin down. Perhaps near West German? I used a great deal of dielectric grease as a preventive measure because no service tech wants a return with the same failure. Right? Also, you cleaned the video connectors terminals using a “Q-Tip”. Sorry, I don’t know what it is called where you work. Is the cleaner just an alcohol based cleaner? Ironic since I’ve used the brand “WURTH” which has a German label under it and have no clue how to pronounce it. In the upper Midwest, they use salt & sand or brine during the winter. Not so much a problem for laptops, but terrible on vehicles chassis and sheet metal. Just curious! Enjoy the videos and already subscribed but like this one as well. Still not sure how leaving a capacitor out, allows it to work the way it’s intended, but if it works, who am I to say differently. Great!

[@zameerkhan5807]

Sorin sir please do modify Normal laptop charger into Dell charger light indicator 😅😅😅

[@massimilianobarresi.]

"Ok it's like when you go to the dentist and the dentist extract the wrong tooth" ahahahahahahahah it's the same here the memory go away np man is called "STRESS"

[@recommendedforyou157]

sir more videos about brute force please.

[@TheIceblade711]

I hate working on older Dell computer just for that reason. I like the older Alienware much better 2 screw and have full access to the MB.

[@em0_tion]

Yeah, i loved AW's construction as well, but keep in mind, business class is meant to be used and constantly worked with, so you had the sliding cover to easily access your cooler - just change the thermal paste and keep going. AW on the other hand needed better access to everything, because they were pretty flexible with what components you could order in that laptop (customization). Logical step for them was a more modular design to allow for those "endless" configurations. Plus, it was double the price and actually, Alienware were a completely separate custom PC firm before Dell bought them out. From the pure repair technician and "do it right" mentality i completely agree with you. Tbh, i don't mind the complicated assembly in this model, my main gripe with it is the insufficient cooler inside. That thing gets hot like a motherfucker :D The older Studio series, even though multimedia user class and an even bigger bitch to disassemble, had much beefier cooling system in a lower price range.

[@farpsy]

The fastest short cap killer of the west.

[@dpwtechnology3907]

Sir i have learned many things from ur youtube video. I am khamsum from Bhutan. Sir if u can kindly tell me what messaging app you use and if I can add you there I will be highly grateful to you.

[@SOB821]

can we set house on fire if we dont have a dell charger, leaving parts of to get it to work is a lack of knowledge