How to solve a overheating issue when the fan is good but not spinning

[@richardjeffries466]

Even if a bit "DODGY" on the repair, your video gave me an idea when I had similar problem on Acer laptop. Your "struggle" was helpful for me. Thank you for what you inspire in your videos !!!

[@viniciusvbf22]

I agree that laptop deserved a little more investigation time spent on it, but that's how it goes: we have good days and bad days at work. This channel has actually gave me great confidence to fix 3 old laptops already. One VAIO with a shorted USB (which I found using the multimeter and then realized the chip was burned when I got my microscope over it), another one Acer with a bad capacitor and one HP with a shorted internal battery (yeah, the battery itself was shorted). This is a great channel with amazing content. Thanks!

[@lukundosichone2253]

How did you find a short with the multimeter only?

[@viniciusvbf22]

Just use it on diode mode (beep mode). It can detect shorts between positive and negative rails (that shouldn't happen).

[@lukundosichone2253]

Understood

[@menziaaronmbizane6443]

It's been a long time i thought you decided not to repair anymore was checking everyday all i was finding is helium videos 😅😅😅😅I'm glad you back

[@Whosewillwin]

😁😁

[@DanielsGameVault]

The key word here is PWM - pulse width modulation. The fan has 5v on the red (+) all the time, but the frequency applied to the fourth pin controls its speed. If this is stuck low, the fan won't spin. If you disconnect it, it will always run at full speed.

[@ДимитърАндонов-ъ7е]

Your are right it's a simple pwd controlled DC motor with a driver and the feedback is a diode for the temperature, so pwm signal is generated from the superIO from what I understand, don't know how it failed, maybe they didnt calculated properly the supplied current?

[@fcuk_x]

How did the fan work off just 5V supply in the beginning of the vid then?...

[@DanielsGameVault]

If the PWM pin is left floating, it runs at max speed.

[@1MW07F]

My laptop cpu fan is not spinning, but I checked the cpu fan and it is good and spinning. Is it possible that the faulty is the mosfet in the cpu fan pin?

[@Kane2009]

​@@fcuk_x I was wondering the same thing. Maybe he accidentally touched both the red and the yellow wires using the power supply instead of only touching the red?

[@horst.zimmermann]

Why can't people clean their shit before they bring it in for repair..... that filthy thing is disgusting

[@inwerp]

how about plastic fan connector.

[@em0_tion]

This is actually quite clean for a gaming laptop. 😀

[@nicolasbrenta357]

In case you miss the description: "After i stopped the recording, the laptop was still shutting down randomly. 3 hours later a found actually the SIO chip is faulty, that's why the fan was not working also"; In any case i liked the alternative solution for the fan.

[@robertvogel4056]

This is not the case, even if the SIO is faulty it will not cause the laptop to shut off, what would cause it to shut off is the EC which is programmed to protect your laptop if overheated or one of the fans stop working. The fix is simple, link cpu side pwn signal to gpu side on the board, would be a cheap fix and would work well in most cases and the EC will not trigger a shutdown as it will see that the pwn signal is ok and the fan is spinning.

[@0ctivate]

@@robertvogel4056 What is EC? Is it not the same as Super I/0

[@robertvogel4056]

@@0ctivate no, EC is another chip that checks if fans spin and other stuff such as if u have mxm gpu, if slot is occupied etc... and will prevent the laptop from operating in case some of the checks fail.

[@trending-tech2913]

Thank you, Doctor, teacher, and repairer. those who are old in this channel will understand

[@rifatahmed4659]

Really like your videos Sorin..... Please never stop uploading ....

[@nikolanikce5087]

Even when you do doggy work you can allways do it better, for example cut the wires a bit further away from the connector, that way no plastic would be melted, the connector would be still removable for various reasons in the future and it would be easier to solder the wires. However i envy you of your computer knowledge Sorin! Continue with the good work, i have seen almost all your videos and like allways can't wait for your next ones honestly. Thank you.

[@samersar3]

Nice job Sorin , but I would suggest to soldering the wires a little bit far from plastic socket ...

[@AMCTechRepairs]

Awesome video again! I think it's the first time I have seen nail clippers used in an electronic repair! 🤣

[@justinc9991]

Sorin!!! Salut! Replacing the fan solve that issue. The driver inside the fan is faulty. The blue wire is an output from that driver which is read by fan controller on pcb. Salutari din Romania!!

[@trlababalan1586]

Back home we say:" Measure three times before you cut!" You obviously cut three times before you measure LOL. Great job as usual.

[@hanzhalahahmed8827]

Thanks so much Sorin i missed you please upload more currently watching video in my college class hehe :P well I'm the teacher and I'm teaching my Computer science programming a Sorin lesson

[@christospashalis6684]

Good Afternoon Sorin from Greece

[@jeramsadventuretv4905]

i am very happy that we meet!!!!

[@rolandberendonck3900]

And So we're back!!!! Sorin is the best 👍💪⚔️

[@metamuhamudnoah2856]

Best Teacher Ever

[@milsiart4976]

Sorin, I have one suggestion: It would be very nice to show people how to convert DIS to UMA. For those who dont know what that means: It is converting laptop discrete graphic to internal cpu graphic so you save the laptop which have DIScrete chip fault.

[@tyronearendse1722]

Hi Sorin, this is a great video. You are always thinking about the lesser people, great work

[@ahmedali-dp6vn]

i really enjoyed the way you explain and go through troubleshooting steps

[@ntechlab8357]

hi, nice video, great dodgy solution, i was wondering what would you do, if there was only one fan, also as you say fan speed is probably controlled from super IO, wouldn't it be better to try and flash the bios first, to see if anything changes.

[@SoftLK]

You could simply exchange fans and check after launching a game uses heavy graphic first of all. The gpu fan may not run always bcz its also connected to the cpu fan for normal use cooling. The gpu fan may only works as extension on a special case

[@yasswaddah4098]

Pretty captivating is watching a man who rarely has the concept of what he does and why, but he claims that he has everything under control. 🙂

[@cjmendoza8599]

Hi sir sorin can you please put the link where you got the soldering iron you're using now.thanks

[@electronic7979]

Nice repair video

[@asteroidcoming]

Dodge ball. Dodge Caravan. Los Angeles Dodgers. Not your best, Sorin; but we still love you. You Da BOSS !!!!

[@Electronics_Repair_NZ]

yay ! back to Electronics repair :)

[@Bogdan.Benett]

:)) I had the same problem with a similar model, the second fan only comes on when you press the fan button next to the power button. Stupid design but unbelievably this is the way they built these MSI laptops. Literally that laptop didn't need any "fixing" in your defence I spent 2 days trying to understand why that fan wasn't working even with high temperatures. In don't understand why msi did that. Remember for the next time when you encounter the same problem. Press the fan button first, and if it doesn't work then fix it :)

[@Oak690]

Great work Sorin thank you for sharing!

[@proton8694]

Mr. Sorin amused me very much by saying during soldering, "there is a lot of plastic here". :-)

[@Beekaert]

Hello Sorin. I see you keep stripping the wires of their insulation with your teeth. This is a bad example. I have also done this several times in the past, resulting in bad incisors and a visit to the dentist that costs a lot of money. Strip the insulation off the wires with a wire stripper or sharp knife, but keep your teeth healthy and avoid this operation, tempting as it may be. A golden advice is worth money. GRTS Andy

[@PeterF590]

Just shows even with years of experience we still can make basic mistakes and end up going down a rabbit hole. :D

[@DumahBrazorf]

Aaaah Sorin, you screwed up a simple job! Well, those connectors aren't pretty anymore but it works, it's fiiiiiine :)

[@gryzman]

I do hope the owner of this laptop never sees this video, cos I;d be upset if it was mine.

[@MrProwler112]

agreed, I cringed a lot sorry Sorin, love your videos (but nobody is perfect)

[@Customer22374rt]

how would you fix it and not upsetting the customer ? I guess make him pay over $500 to replace the motherboard !! the problem is not the fan , it is the super io . what would you do ?

[@em0_tion]

Too much high brow, we're talking about a laptop gamer. Cheap fix and it works, moving on with life... 🤷‍♂️

[@Aneesh.Asokan]

@@Customer22374rt Exactly!😁

[@dalyr6804]

You made also one of the biggest mistakes, you didn't checked the BIOS settings, there you can turn total turn off the fans from the BIOS settings on almost every bios. So next time when the fans are not working just check the bios settings, it's free and you don't need to cut wires in case the fan, wires and motherboard are ok!

[@Ghost572]

Thanks for this tip

[@fraizfester8713]

This was super dodgy! That's great, that the laptop got fixed, but it would also be possible without destroing the fan connectors =( Also, the GPU could be off, because it turns on when an GPU intensive task is launched, like a game. Thank you for the video!

[@sleepwalker6825]

Sorin ='s dodgy

[@SerenoOunce]

No issue with the final repair itself, but would have been more practical and cleaner to just de-pin rather than cutting the wires.

[@Ghost572]

Stop talkin' n start choppin'

[@fraizfester8713]

@@Ghost572 no time to explain! 😁

[@shamshadansari1765]

I would call it a budget repair . Nyc job sorin

[@hbh3144]

As an explosives specialist trained in many Hollywood courses I can assure you: Never cut the red wire!

[@mikanikolic1976]

Proper funny video. tnx Sorin!

[@kennith.]

On PC when we run out of fan header on the motherboard need a spare fan header we use a fan splitter cable to connect a second fan.

[@matanbruchim6628]

Hi' great channel ! Thanks! What can you do with a laptop fans that won't spin fast enough, they are clean, new thermal paste. The fans will spining fast but not when they should- i mean, when the laptop getting hot (90c -+ ) they keep spin low and when they finally increase the speed the temp is lowered as it should. No bios update available Asus u563x Thanks!

[@arash2paris]

sorin, some applications in gaming laptop can order fan to stop , next time check them first. i like you sorin

[@vladomedjed]

keep up the fantastic work love your videos

[@anonymous_t223]

25:30 Soldering on powered on laptop gave me a moment of anxiety. lol

[@ZubairKhan-vs8fe]

our friend is back to electronics after making millions in helium mining

[@DevilbyMoonlight]

looks like someone been using it to put their cups of coffee on... on my MSI laptop 1 fan is for the GPU and it only runs when that GPU is under load, if its running only the built in gfx on the CPU like you would if your only running the desktop the GPU fan doesnt spin, but the CPU fan does it may be worth checking the gpu fan profile in dragon center

[@MegaKojot123]

Ciekawy jestem w jakim czasie ten laptop wróci do naprawy. Podciągnięcie czujników z wentylatora pierwszego było pomysłowe ale pierwszy wentyl obsługuje zwykle kartę zintegrowaną, która nie działa w grach, więc wentyle będą sobie leciutko wiać gdy karta wewnętrzna. będzie obciążona w 100% Ciekawe czy to wystarczy.

[@djtongi]

there's plus, minus, one is TACH signal from the fan back (mostly yellow) for the rpm and one is a PWM signal from the board to control the fan speed. 99% of all fans in desktops or laptops and even in servers work this way. The first thing i'd have done is looking into the BIOS and check for the fan control. Then checking the operating system. Sometimes there are Fan-Tools, that take over control completely... and cause these problems. Not measuring and not looking into the BIOS was really dodgy...

[@intrax2tv]

Bad case of dodgy repair gone wrong ! Just put some hot glue, it will be fine...😇 Activating the fan in bios would have solved the problem right away !

[@ODRACLIVE]

Thank you Master Sorin!!!

[@johnbos4637]

Oh god, please don't hack up connectors like that. If you need to test something, simply lift up the little plastic tab holding the pin in the connector and it will pull out easily! Geez! If I was that customer I would bring the laptop back and tell you to replace the connector again because that is just butchery beyond belief. Don't hack up connectors! Just lift the plastic tab and remove a pin if you need to do that. Think......

[@infinitygarage1618]

I have an MSI GE72VR 6RF Apache Pro (basically the same but a newer model) and the gpu fan only comes on when the gpu is hot or you turn on cooler boost. It is not supposed to run all of the time.

[@MrRvdbeek]

Nice thinking 🤔 But dit the customer say something about trying to do software changing and test the fan. He can turn it off. If he didn’t you did the best you can to make is cool enough.👌🙏

[@MrProwler112]

Syncing GPU & CPU PWM fans is a really REALLY bad idea, cause depending on the load (gaming or video editing etc) you can have a high CPU load thus high CPU temp while at the same time having a low GPU temp and vice versa. For example, if you use AIDA64 your CPU can go up to 100C while the GPU stays at 50C and if you run a GPU intensive game you can have 60C on the CPU and 90+ on the GPU easy. Now imagine having a low RPM on the GPU fan on the 2nd scenario cause it is synced with the CPU thermal sensor...

[@sakisgri2165]

You have a point but the heat pipes from the gpu go to both fans, Sorin did talk about it at about 4:00 . And the fans did spin faster when he heated the pipes on the gpu with the hot air gun so it seems to be ok. Even if not the pc is smart enough to shut it self down if temp was to exceed in some case.

[@inwerp]

@@sakisgri2165 thats not correct Even if half of pipes where shared there is no way heat on one chip could warm up another crystal hot enough to get to the internal temp sensor. Hotgun is not valid test at all, this is 200-400c applied directly to the pipe.

[@ИлиянБелев]

I had a similar cooled laptop (based on clevo p670rs-g). My laptop cooling was the best I've seen for a 'slim' laptop. I'm not an engineer or someone who repairs laptops for living, but I've seen a lot of laptops as " the tech friend who understands PCs", to clean and repaste the machines of friends and family. I've never seen a laptop running a game, to be cool on the CPU and hot on the GPU with differences like 60 to 90C. IMO laptops BIOS is always trying to keep the fans quiet and even when the temps are 95C, it doesn't blow at 100%. (I've seen few laptops with a Control Center that can push the fans to 100%, which shows you how much louder they can get). My point is that when gaming, even in lighter games, from what I've seen, most laptops are going to let the CPU reach atlest 85-90 degrees on the CPU and it should't be such a big deal the way he did the repair. P.S. My experience is on older laptops with 2cores or 4c8t Intel CPUs, so you are probably correct that the CPU can be a lot colder, if you run something like Heaven's Benchmark and no load on the CPU.

[@inwerp]

@@ИлиянБелев Gaming Laptops have much more pressure on cooling system which means manufacturers try to keep low rpm as long a possible, otherwise it would be constantly loud + have much shorter lifespan. As a repair engineer i see absolutely no issue in fixing pwm signal even if its lost, worst case that would be EC replacement + flash + pwm controller replacement. However it should be considered as a board level repair, basically cooling system us as important as any other system on laptop and it is one of most common failure reasons. There are many other components which shoild be cooled like GPU RAM and switching mosfets.

[@Customer22374rt]

@@inwerp respect your idea but why are you here ? the answer is to learn . you are not in Sorin's level to be a critic . Please go do what you do and stay away from this channel or learn and be quiet . Sorin in another level above all what so called engineers . peace

[@Swede_4_TRMP]

Just reset bios. Fan issue fixed. Press f2 repeatedly when starting the laptop

[@panagiotiszafeiriadis8425]

Great job 👍

[@halirumuhammad3504]

This is good Work

[@rudrapratapsinha8880]

Is it possible that the laptop is looping without screen, just because of heating?

[@iNdepDev]

Honestly thats a huge mess. This could be a software issue or a normal behavior without testing it properly.

[@adrianmedina7065]

Hi Sorin, I have a toshiba satellite L845 laptop with amd apu A6 4400m cpu which heats up to 98 - 100 degrees in just about 5 minutes of turning it on, then it turns off, I already changed thermal paste, the cooler fan spins well, I see it in good heatsink Status, will the motherboard have any electronic problems? Maybe some smd thermal sensor? I hope you can guide me on what to check, I already have the schematic of the motherboard but I don't know where to check it, thanks!

[@fliporflop7119]

place a thin 0.5mm copper plate (amazon) between the cpu die and cooler with thermal paste on both sides, had this exact issue with a different laptop and temps went to 40's in idle from 70's.

[@adrianmedina7065]

Hi,@@fliporflop7119 thanks for response, I had already tried this method with the copper plates attached, I bought them on Aliexpress, I had no success, the amd A6 apu cpu reaches 100 degrees in a few minutes and the laptop turns off without me being able to resolve that failure

[@fliporflop7119]

@@adrianmedina7065 maybe the copper heatsink is punctured and the small amount of gas that should be result of the liquid inside the copper is not completing the full cycle of moving the heat as is was designed to. Most gaming laptops have heatsinks with a little liquid inside, when heat is applied from the cpu die, that turns into gas and helps dissipate heat faster, if the heatsink is compromised, you can experience the issue you are describing.

[@talebtech6971]

Nice check and trick

[@jazels1070]

so replacing the fan and heatsink won't help?

[@cyberpeque]

I use to be amazed with the technical skill and dodginess of Mr. Sorin. But after watching this video I felt disappointed. Sometimes is better to take a deeper look at the mainboard before turning a fixing into a mess. On 4 wires fans, PWM signal is used to control spinning speed. That PWM signal comes usually from a tiny chip than converts the digital signal from SIO into PWM signal. There is a big chance to that tiny chip to be faulty, not SIO. Futhermore, if a discordance between the speed determined by PWM signal and the speed sensed by the fan speed sensor is detected, SIO might decide to make an emergency shutdown in order to avoid overheating damages. That can be the reason for that laptop to shutdown randomly.

[@ShiningForce07]

Quite an intesting thought that would solve my older laptops issue too. Fan change hasnt solved there the problem.

[@fliporflop7119]

Chat gpt read your comment and it's said it's almost correct, only thing he corrected is "PWM signal is typically generated by a small chip on the motherboard, not the System Input/Output (SIO) controller chip. This small chip is responsible for converting a digital control signal into a PWM signal that instructs the fan to spin at a particular speed."

[@Erkanalpalp]

Why u didn't try to switch fans and check Motherboard is ok or not?

[@rfr653]

good job mate.

[@blitzx2049]

The job is done!! Keep up sorin you're great ❤️❤️

[@ShiningForce07]

Well I had a similar issue when my Dell laptop kept rebooting from about 5 minutes running on and on. The laptops under cover were quite hot and I thought the wifi module went bad. I went to the service where they made the fan to a fixed voltage but that not solved the problem. Later they guessed the SIO chip or GPU has an issue but said the repair wont woth it. I did want to write to Sorin but now I came across this video however it would be nice to make a video about the super IO chip issue,

[@bblod4896]

Out of a perfect 10.0 in dodgy repairs, I'd give Sorin an 8.3 😎

[@purna3271]

You can press the third button near the power button to turn on both fans at full speed

[@DanBurgaud]

I have this laptop. I have to re-paste it every 3~6 months. 11:10 a wire strand broke :( be careful it might short something Did not like soldering too close to the connector melting it. I'd splice higher, about 3 inches away.

[@JazzEnso]

For me better to tap the red wire on nearest 5v suspend on that fan circuit. for sure there is resistor or Ic nearest on missing fan voltage

[@1MW07F]

Hello idol. Possible ba na may problema yung mosfet sa cpu fin pin? Ayaw kasi gumana cpu fan pero okay naman kapag sa power supply ko nirekta

[@JazzEnso]

@@1MW07F wlang kinalaman ang mosfet dyn, fan circuit ang may problem dyn.

[@1MW07F]

@@JazzEnso Bale much better palitan na yung cpu fan no idol?

[@1MW07F]

@@JazzEnso Nung chineck ko sir walang 5v sa cpu fan pin.

[@Lanz328]

same problem tayo kaya nakafull speed fan ko naka tapped sa 5v@@1MW07F

[@mikrok2]

dont yu think when the gpu raise its temperature higher from cpu its going to shut off again?I think probably you must test its playing a game to see the temp in case you have a problem when the gpu heats up properly

[@robertvogel4056]

It will shut down as the EC will shut it down since it cannot see pwn signal on one of the fans.

[@jerryanstey7058]

So only the blue wire needed to be cut ? ?

[@adamdanielbalan7291]

Hello, I have a laptop for repair. Do you have any Web with contac email anything? Regards

[@Popeyes66]

The Board Butcher of Britain. Those fan connectors now look like Brixton on Market day .

[@matrixclone1403]

"The Board Butcher of Britain." ROFLMAO

[@amielem]

29:00 No need cut the wire...you can take off from plastic conecter... GG!

[@windycl111]

so will they always spin?

[@ddjazz]

I like your other videos , but this one is a real dodgy repair and assuming the driver is over specced , without even looking up the specs or trying to diagnose the real cause. Not a fan of what you did here.

[@entertainmentguy4509]

i have fixed this issue on my hp laptop by reinstalling the OS..so i guess it was just software issue since i installed "not good" verison of windows :)

[@robbirobson7330]

its because your windows was not activated. if you activate windows it will make all fans spin with the correct speed

[@entertainmentguy4509]

@@robbirobson7330 it was activated, but it was pirate version

[@mart43]

@@entertainmentguy4509 Lol no you fan is not controled by windows UEFI/Bios controls the fan speed.

[@entertainmentguy4509]

@@mart43 ive just said what fixed my issue, nothing else

[@Customer22374rt]

@@robbirobson7330 Really ?

[@ElGentilTecnico]

I'm disgusted by the work you did here. You can't go around cutting wires without first measuring the stresses. You are not even sure if it is an ordinary fan vcc, rpm, gnd or a fan of 4 connections vcc, pwm, rpm, gnd. That machine is worth a fortune and you arrange to place jumper wire with hot silicone??? Terrible level of work. It is stupid to argue that by reviewing what happens you can be damaged more, the only way that happens is that you are a total incompetent. and so you know they are fans by pwm that are handled by the KBC based on independent thermocouples. clearly the fan works so you should check the PWM line from the fan connector to the EC/KBC. It goes through a resistor of value 0 that may have been damaged. also the connection of the EC pin with respect to the motherboard. and finally the temperature sensing lines since the EC generates an independent PWM for each fan depending on the temperatures

[@electronicsrepairschool]

idk, but the laptop was working and we charge the money for that repair, which is all that matter in a computer shop. Here is England, if you are not able the make at least a hundred pound/hour, then you are not a good addition to the shop. How you are expecting to be paid £15-£20 per hour if you can't make £100? Its all about the money in a computer shop and all what matter is the job to be done and work in the warranty time which is 3 months, sorry, but i didn't make the rules. For me, kbc/pwm/ec are just words, noise, things which are not matter, things which sound like a lot of waste of time.

[@fliporflop7119]

hello hernandg5054 - good comment ! PWM Control by KBC: In many laptops, the Keyboard Controller (KBC) or Embedded Controller (EC) plays a crucial role in fan control. The KBC is responsible for handling various system functions, including fan control based on temperature data obtained from independent thermocouples. a. PWM Line: checking the PWM line from the fan connector to the EC/KBC. This is an important step because the PWM signal generated by the EC/KBC needs to reach the fan to control its speed. If there is a problem with the PWM line, it could lead to fan speed issues. b. Resistor Damage: If the resistor is damaged, it could affect the PWM signal's integrity. It's essential to check the condition of that resistor. c. EC Pin Connection: A loose or damaged connection can disrupt communication between the EC/KBC and the motherboard, potentially affecting fan control. d. Temperature Sensing Lines: The EC/KBC generates independent PWM signals for each fan based on temperature data. Checking the temperature sensing lines is important because accurate temperature data is crucial for proper fan speed control.

[@ionutsava2547]

Laptop-ul are un buton de pornire pentru acel fan langa buttonul de power,nu functiona cu el ?

[@Damjanhd]

next time you want to heat up GPU, try to use some mining software on it, it is much safer than hot air and you can test as much as you want GPU

[@melplishka5978]

Sorins still thinking about the antennae lol

[@LAZYJOHN101]

Any idea why hard drive gets hot?

[@sabsab692008]

why cutting wires from edges? leave some room incase u need to solder back.

[@hakiminet1]

You are great

[@BP-sf7br]

I would cut the fan connector wire at the middle point instead of at the neck... It would give me freedom to connect wires properly & less messy..

[@carelectricaldiagrepair919]

Hy Sorin I have a special laptop actually is a Car diagnostic system from Snapon and it stop working maibe i can send to you for repair is just trying to start and it stops how I can send to you? And you can make a video.

[@yuditanoto6704]

I have a heat problem with vga ati, it causes a bsod with the words "atikmpag.sys" I added a thin copper plate in the gap between the VGA chipset and the heatsink then the temperature returned to normal and the laptop was normal But after a few months passed, the bsod "atikmpag.sys" came again. even this time the laptop screen won't turn on Have you experienced it?

[@gerhardschiwek6443]

h

[@Customer22374rt]

junk it

[@yuditanoto6704]

@@Customer22374rt Refusing to be trash :D , I make it an eGpu using a riser. Because I do not have a rework station to remove the bga chipset.

[@Martin-ot7xj]

Hi there , at 07:26 , what's meaning of Driver? thnx

[@ДимитърАндонов-ъ7е]

He speaks for the DC motor driver which is an ic, typically H bridge, you can Google what is h Bridge and of course a logic that controls the speed and direction, the direction also can be controlled through the H bridge, but the speed is PWM controlled

[@Martin-ot7xj]

@@ДимитърАндонов-ъ7е thankyou

[@Flavius-Tech]

I believe that fan can be controlled by bios settings or windows softwares. The wire can be a data line and it was turned off from software.

[@pihmusik]

[@jrbjeremie2354]

Last week i was facing the same issue and try this method but PC stilling shut down randomly. Finally concluded issue comes to another part of PC not a fan.

[@fir3blackdragon]

Sir, how to fix Lenovo broken bios chip?

[@MrKosnireggae]

try to flash with alternative bios ic and file for your model very simple

[@keithmcgerr3056]

There was a bad msi bios update that did something similar

[@melektutor777]

sorry sir i am Kingsamuel from Nigeria i am actually a newbie i have been watching several videos but i don't quite understand some of them can you please used beginner terms in some of the video for new subscribers

[@user-te1le7ck6b]

Lots of guys complaining about repair methods but it’s called economies of scale , what do you think was charged for this job ? When you have that , you’ll get your answer to the repair aka dodgy , yes they are better ways but they take time which the customer won’t pay for given the demographic and the age / condition of hardware.

[@petr5178]

If i must i will do it same like you, but you dont clean the dust from fans a dont apply new termal paste. I thing this is half work. Sorry

[@ivinnykov]

Solderind technique is awful. You killed plastic connectors. If you need to cut a wire, you should do it far from the connector.