Asus Vivobook N7600P mosfet replacement - Why always the middle mosfet getting shorted!

[@homelessguy6947]

thanks to you i fixed my laptop today. how i can repay you for the knowledge you share. god bless you.

[@ThermalWorld_]

Sorin if you can't solder the new MOSFETs because the solder don't stick on it, is because the silver layer oxidate over time because they take the components out of the vacuum enclosure.. You have to polish first and tin it.

[@viniciusvbf22]

Yeah, I've had the same problem with new chips. The manufacturer told me that I have to let it in a furnace with a controlled temperature of 100ºC *for 24h* to remove humidity and the oxidation layer before installation - something that I doubt anyone does.

[@NXTECHPHONEREPAIR]

@@viniciusvbf22 we can't wait for the whole 24hrs sure

[@jasonhornby3161]

I bought a laptop when I visited Taiwan back in 2009. I've always wondered why it had long holes in the motherboard between the mosfets. Your heat spreading idea makes the most sense. Thank you

[@Swenser]

You are the most well reasoned person in the KZbin community. You make sense each time. Would you consider becoming king of the world? If so, what would your first priority policy be?

[@sumedharanganath]

Wow! Your're the god of electriconic repair sir. You teach us every electriconic thing what you learned and what you thinked. Thank you sir 🙏

[@StefanSolomonsz]

It's very interesting the newly started Forum, we've also joined the team and hope everything works smoother and finer.. all the best Sorin for great effort...

[@Trustsimo07]

thanks for the video, you are brilliant, detecting the manufacturing issue a bad design

[@dobaayaz]

Designer is on our side sir

[@nicksonmisiko8571]

You are my best lecturer on laptops

[@ДимитърАндонов-ъ7е]

Nice explanation as always

[@laidman2007]

Agreed, it's a design flaw. Good demo. Thanks!

[@mm0077]

Thank you for sharing the follow up of the previous video.

[@christopherbullard835]

Outstanding troubleshooting skills.

[@blackdotkiller1]

I did suggest that about the thermal pads on your last video on this laptop

[@Radek__]

8:55 just buy fibreglass pen - it will scratch gently remove the oxidation, and you can use is also when you want to do a jump wire (to easly remove the solder mask ). Or if you don't want to buy it, then use a sand paper or precision knife to scrap that oxidation. The mosfet is good and original, but It was storage in bad condition, that is why the pads are more grey, not shiny.

[@GregM]

If you use a fibreglass pen use ahdesive tape to pick up any the fibreglass fibers afterwards. You do not want fibreglass on your skin especially if you are sensitive to it.

[@Radek__]

​ @Greg M yes exactly. I was thinking of buying very small vacuum cleaner to suck out it from the desk.

[@QARepair]

Nice Video, thank You These days all designed for no long time lasting, non repairing - glues everywhere, no thermal solutions e.t.c.

[@santoshmundepi2977]

U r such a genius sorin

[@maklogetrich2378]

18:51 if I'm not mistaken, that thermal pad is for the SSD, I've seen many ASUS laptop use that thermal pad for their SSD

[@barryw.9419]

Absolutely thermal pad is the longevity solution. Unless I'm wrong; I noted the highest heat point was actually the middle inductor coil. Similar to MSI gaming unit's; seeing thermal pads particularly at BGA covering both coils, and mosfet's. Looking specifically at Mosfet temps. it looked to me as though mosfet temperatures seemed relatively uniform. 100% agree with your analysis, and practical theory, including the diagnosis as manufacturers design defect ! Luv your channel, Thank you sir.

[@mohamedhamdy-sh5tm]

My answer before I complete watching your exciting repair video is : the heat

[@petroniustrandafir4565]

I have a laptop from this series. The yellow thermal pad is on the M2 SSD from factory

[@thomasunsworth425]

Check the current flowing through each of the three MOSFETs and that will give you the true power going through them. Also, put some of the heat sink rubbers stuff on each one with a space between each rubber strip

[@moristo]

LO and HO mosfets integrated in one mosfet, I think you can try find the more high power mosfet that can replace that weak mosfet.

[@rfr653]

Good job mate 👍

[@repaircorner3322]

Nice investigation and good job!

[@MrRvdbeek]

Sorin you are electronics lover i saw the video You show us your new laptop with termopads inside

[@ablacon64]

Good observation! I never though of that but it seems pretty logic the center mosfet will get hotter. Shame on me! kkkkkk 4:30 Not a different manufacturer, that first line is code for assembly plant, date and lot. The logo difference is probably due to a different factory/building of the same manufacturer (or it's counterfeit, but I don't think so because I have seen that difference before). Onsemi has plants in several places and they produce quality components. We don't really know how the seller is storing their supplies and for how long it was stored, it seems that some oxidation formed on that mosfet pins. When the new part has a dull color like that I always clean it with some acid before soldering. New components are never shiny, of course, but that one was too much opaque to me. 19:00 that thermalpad is usually over the coils. Better if you let it over the coils and yours over the mosfets, double protection!

[@lovejoymakhaza5229]

Thank you so much Master

[@CipyLan]

Great job!

[@laptopDoctorKZN]

what is the back cover maid off .. maybe metal.. or there a copper like tape there and thermal pads go over the fets

[@paulrockwell2644]

still mhave been working on pc,s cromebooks,apple imqacs 10years

[@NewsonsElectronics]

what camera do you use?

[@carlosgarciaoropeza5480]

If a thin sheet of aluminum with two anchors had been placed on top of these three components (like the one used in TV tuners and/or cell phone), I think it would be a feasible solution for the new boards that this manufacturer will build. Another way of saying it, it's up to Asus engineers, not us, that is, it's up to them. All the best.

[@mikanikolic1976]

is it perhaps better to put a new mosfet in the middle because it heats up more?

[@laidman2007]

Do you think it would have helped if they'd given more separation between them?

[@Ed31003]

@ 5:40 does it matter that two top left pins of middle are soldered together?

[@SianaGearz]

Yeah it's all good, no harm at all.

[@carlosgarciaoropeza5480]

@Ed Boss: It's normal, it doesn't matter; (5:42) Notice that both top left pins are soldered into a wide (thick) circuit line leading to one end of an smd ceramic capacitor. On the other hand, if the two pins in the upper right corner were soldered together, then we DO have a problem (short circuit) since they go one by one to each end of the small black body smd component. All the best.

[@HalifaxComputersRepair]

where od you buy your mosfetS?????

[@chumatez]

Nice one 🎉🎉

[@skullkidn64]

Does anyone know the episode when Sorin fixed a Sewer Camera?

[@electronicsrepairschool]

kzbin.info/www/bejne/oZqZgaV7ba2gqc0 this one?

[@pirelli77]

Sorin im sure you would surely put a thiiick layer of thermal pads on the mosfets. I would do that too, because heat always kills electronics.😣☺

[@AlaskanInsights]

been seeing this a lot lately, oxidized pins on new chips.

[@GlishaSo]

its dirty mosfet clean it with isoprophil and than solder. amazing solution on end it will fix problems 100% ! GG

[@AtParla]

Salutare Care dintre cele două șurubelnițe electrice e mai buna? Care recomanzi tu ?

[@thomasunsworth425]

Suggested adding the rubber heat sink pads while watching, then at the end of the video, you added them ..... Great minds hey

[@freeuyghurspalestinekashmir]

Sorin, did you help the customer to apply some of your thermal pad?

[@WeFixTvs]

geat thanks

[@SidneyCritic]

Was the resistance at the coils the same.

[@carlosgarciaoropeza5480]

@SidneyCritic: Hi. (4:07) The three part numbers of those coils located just below each Mosfet are similar, so in theory the resistance should be the same value but we don't usually want to unsolder them, so if we have different readings between them it is due to the resistance added by the other components mounted (related to them) on the PCB. Due to the area where they are mounted, the values ​​should be [0.2 - 100] ohms, that is, less than one hundred ohms. All the best.

[@SidneyCritic]

@@carlosgarciaoropeza5480 Usually VRMs are in parallel, ie same resistance, but I was thinking it might be something like a graphics card. Basically GPUs have identical VRMs, but some are for VRAM and some are for GPU, ie, different loads. I was only interested in the resistance on the load side, so it's just a measure from the coil/inductor side to GND. It was a long-shot that they are separate, but it would've been nice if it was confirmed - I've noticed Sorin glosses over most stuff, ie, he knows in his head, but never tells us -. Oh well

[@moisessto.domingo4655]

that thermal pad is for SSD .

[@cephasbanda1531]

Genius

[@pcmedicbiz]

I'm confused! MOSFETs are positive temperature coefficient devices. Therefore, as the temperature of the device increases, the resistance increases. In other words, higher temperatures result in lower currents, thereby surely working less, not more?

[@Maciej.R.]

Pisałem już wielokrotnie że nowe komponenty wymagają ręcznego pobielenie cyną. Zawsze tak robię. Oksydacja.

[@MartinRepairs]

Try cleaning mosfet with cotton swab and alcohol before soldering

[@fbifido2]

Does this mean the laptop will come back with the same problem? maybe?

[@fbifido2]

ok i see the pad at the end.

[@elviejoperro3077]

👏👏👏

[@TheMausebert]

The pad was not pressing against the motherboard. If it did, it would have marks of the mosfets or coils.

[@xx3868]

Maybe... Use 2 very thin pads with aluminium wedge between and this will dump the heat better to the cover, than a big chunk of pad or pads as when thick they resist heat more. Unless the part expands a lot, i use thin .5mm pads to transfer the heat as much as possible to copper or Aluminium. Gaming Mosfets can get really hot and you only had it idling, so really hot when running hard? No wonder they fail early. Maybe ASUS could use heavy mosfets to take the stress??

[@gorky_vk]

Asus should just use one more phase and it will work fine. But which company wants to make product that last long time amy,pre?

[@maklogetrich2378]

it's weird because when you enter the bios, the cpu is getting a full load it's not idling

[@kaizen1071]

Emeğine sağlık üstad. Videolarınıza Türkçe altyazılı olarak açılmıyor yardım edebilir misiniz. Sağlıklı günler dilerim.

[@thankyou7741]

nice

[@mavesoft3284]

9:06 I use a fine sandpaper to remove any impurity and then I apply tin, repeat I and works fine to me....

[@ohmware2020]

sorin, its ur mistake, if you replace a faulty mosfet, u should also replace its driver, or else u will get unlimited backjob, and correct me if im wrong, the object getting hot is not the mosfet, its the inductor 😁

[@sipansibabdreddknot5179]

if its the same mosfet as the last one then theres no reason to change or if the driver is faulty too then maybe change it

[@carlosgarciaoropeza5480]

Yeah. Okay. Mosfet stays. New or used driver IC. Another similar coil from a donor. Thermal camera, IPA and my finger (touch). Monitor temperature every half hour for a day and leave it on all night. Another way of saying it, if I were the owner I would like if it is possible to install new parts in the vital components for the repair. All the best.

[@lucataszarek8782]

Hello 🤝👏👏👏👏👍👍👍👋👋👋👋

[@joshjones4222]

Looks like the M.2 thermal pad

[@barryjensen296]

IMHO, Your pads are backwards. The small pad on the mosfets. The larger pad touching back cover. That way the heat is transferred to larger area of cover.

[@ilikeito]

You should've swapped your mosfet with one of the others to see what would've happened with the heat.

[@joeyjustin6895]

9:20. ITS CALLED REALITY ITS CALLED. N.E.W. NEVER EVER WORKS

[@jtaraskus]

14:18 it's not design problem, it's oportuniti to sell new computer to customer, as he burns out :) or oportunity for people like you :)

[@ctecrwp]

So Master Sorin don't want manufacturers to keep way open for new hardware.....hmmmmmm😂

[@davidlguerr]

The manufacturer does not care if the laptop is going to fail, because it will fail after the warranty period.

[@deleanuandrei9612]

As I am watching the video I see that the coils are getting hot. Not the mosfets. I have no intention to correct you Sorin. Just observing.

[@deleanuandrei9612]

And I got to the other video. There also. The middle coil is getting hotter.

[@SianaGearz]

Coil temperature is indicative of the temperature inside the PCB in the current carrying layers in that PCB area, since they have the best thermal contact to there. By itself it's not interesting.

[@paulrockwell2644]

dam i wish you could me my personale teacher just need that exstra help to understand it all little better

[@ieronimosgr]

Lg television... same story burn cpu

[@raynrayn.8818]

👋KSA

[@Electronics_Repair_NZ]

what did i told you ;)😅

[@bhok5228]

Laptops are for light tasks only

[@luminousfractal420]

One shim going to that heatpipe woulda done it. Seems like a lot of heat leaking across the board from there too. . .ohhh that shell...good job whichever drawing board designer chose looks over function 🤦 i bet they moved the pad so the slatted design wasnt affected 🤣. Not good for a brand like asus

[@paulrockwell2644]

do not sell your self short you no how many people youy have helped and help people like methats poor ass hell

[@zus6889]

Sorin, sorry the thermal camera showed the inductors getting hotter not the mosfets or the thermal camera is not calibrated, not be able to solder new chips is common they are oxidized use fiberglass brush to clean it :D

[@fu1r4]

The mosfet's on the outside will warm the middle one ...

[@ericjarvie]

Sorin i'm presently suffering an serious issue with an cheap ASUS laptop and i'm becoming distrusting of the manufacturer even more so with his recent AMD chip burning issue and not honouring warranties with his "dodgy" BIOS updates thats right Sorin he's the real one who is seriously dodgy...but what does all of this say about the quality of materials if your having to "tin" with solder those Mosfets? never mind the heat dissipation issue which he has clearly missed after all its not really your place to put this manufacturer right but as you can see you obviously are...I swear i'm never going to purchase anything from this manufacturer again i've had it up to here with him and the dead laptop i'm left with...

[@SianaGearz]

Well it's not like he's buying the MOSFET from ASUS. The MOSFET probably spent 10+ years at parts supplier on the way to him and grew a hard oxide layer, maybe it wasn't handled very well. So MOSFET rejecting solder is just unfortunate but neither here nor there, does not reflect badly on ASUS anyhow. The rest of the issues do reflect badly on them.

[@ogremgtow990]

More like Intentional design problem. it guarantees a failure in so much run time.

[@dannechita8577]

Asus used to have good products. not anymore i guess

[@Takedown87]

Did you learn about last big scandal about asus motherboards causing new ryzen processors to burn. Search it here, they arent that great anymore

[@Kukilo_Kumo]

That is fake mosfet 😆😆

[@AndrewBryantPianoTuner]

Put a heatsink on it