That's why i don't replace chipset/cpu/gpu :((((((((((((((((((((

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[@viniciusvbf22]

This is something I'd like to try someday: change a chipset or SOC with a very basic pre-heater and hot air. You have done it beautifully, Sorin! It's a real shame that it didn't work. I feel that most people won't ever realize how hard is that that you have done in this video. Well done!

[@costinpopina]

Many people stay on the side and comment a lot, when give them the hot iron to do what u do, they start to mumble words, because they are not able, they are just able to talk s**t.

[@tastytechaddictsmtb]

Easiest way to cleanup pads without risking ripping pads is put super low melt solder on the pads with an iron, then use flux, low temp hot air and wick to dab and lightly brush the pads with tweezers.

[@Drottninggatan2017]

If you return the chipset then they will sell it to somebody else. 100% tested by Sorin.

[@SakthivelRM.]

😂

[@dorfschmidt4833]

These mofos force you to send defective or wrong stuff back, what do you think is the shipping fee for a registered parcel to China ? That's the trick.

[@ceciliafrompoland8360]

return this chip to China will cost more than order 2nd chip, Chinese kung-fu tactics 🤣

[@lPlanetarizado]

@@ceciliafrompoland8360 good point lol

[@alif__]

@@ceciliafrompoland8360 "kungfu tactics" 😹

[@SiETechNotebookReparatur]

After chipset replacement, you should almost always clear the ME region in the BIOS. But it probably won't help with the crack either.

[@MrHimer12]

There are some ME regions which versions are not available as "clean" so in those instances you need to take PCH from "working" donor and get ME region from donor board to make this work. To simplify you get ME region from donor's BIOS because it already has that ME region and it will work funny if tried with other or will not work at all. As far as my experience goes you cannot directly read from PCH which exact ME region it has on it. Clean ME region of course solves all the problem because on the startup it will be rewritten. In case of non clean ME region availability well without donor and it's ME region you're down. Aaaand usually planting newer or lower version of ME region will result in not working. I rarely had PCH respond correctly to newer ME region version than it had and I had to revert to version of ME it had - don't know why that is. It's my experience.

[@dorfschmidt4833]

@@MrHimer12 Why does this ME region crap exist ?

[@MrHimer12]

@@dorfschmidt4833 Simply speaking - Ask Intel. Their way of security and containment of platform and adjusting it's working. No region, no tpm, no management of their chip working or if something is wrong it boots as safe mode where everything is throttled or in this example but we don't know if it's chip or regions fault - not working at all. Except BIOS another piece of firmware on chipset. Just Intel's way of doing. No such problem with AMD platforms.

[@SiETechNotebookReparatur]

@@MrHimer12 Yes, sometimes you can play with it for days :) If I have no other idea then I take random BIOS files from laptops with the same PCH, extract the ME and try my luck with it. At some point, somehow, it fits in the end. e.g., from HP, if you find a board with the same chipset, you can extract Clear ME from the update file. Fortunately, it's relatively rare that you can't get new ME.

[@MrHimer12]

@@SiETechNotebookReparatur Well I accounted my comment to cases when someone might not be in posession of boxes and drawers with spare parts MBs like I and many do.

[@mr2000jp]

i've been doing bga soldering for many years , and i noticed that if the corner of the silicon is cracked , that doesnt necessarily have to be a damaged chip , since the circuit on the silicon doesnt reach the corners , thats why it might still work fine , happned many times with my long years experimenting with those chips , but generally , if the board have a bad chip that means the board reach a bad level and many components might already be badly damaged and finding whats bad takes a lot of time to figure out which makes the whole thing not worth it , one more advice, dont try to solder the chip with small nozzle tip when using a small heatgun , heat will be concentrated on a small spot , and might cause solder to not be soldered evenly or cause the board to burst a bouble , use the blower without a tip and try to heat the board around the chip a little i miss the old days before the BGA technology started , every thing was much more simple and it wasnt hard to change big chips

[@ericjarvie]

I hope people appreciate your hard work Sorin as its one thing repairing the customers beloved but broken laptop but faulty or inferior manufacturers supplied parts well thats another that just adds to an already heavy and overbearing workload...I swear i get physically tired just watching this and its no surprise to me to see inferior goods come through the post and you forced to work with them...but you always prevail and get there and you never accept failure so for that your an hero...!!

[@jonathaningram4672]

I think I can speak for many, changing a chip set is very stressful and many won't even contemplate doing so. I personally wouldn't do it. Top marks for effort.

[@dragonlard4595]

Nice Removal.. Quick and Clean.

[@idelintodorov3022]

You can try reflowing the chip with the hot air station directly pointing to the chip. Add lots of flux. Lower the speed of the hotair station, lower the temperature to about 300C and do it until the chip shifts. You also may need to reflash the bios.

[@cj-pz2kk]

omg this is so cool! best of luck to you buddy!

[@ErickBuildsStuff]

Simplest thing would be to find a same motherboard from used market like broken laptop and get the thing replaced. You are an expert and I don't need to tell you. But it is for educational purpose and thank you for making the video

[@RTPTechTips]

Great video! Appreciate you sharing.

[@anthonydenn4345]

Unlucky Sorin, nice job reflowing it though 😄 I think that damage on the side is from a chip holder that was used to reball the chip. Maybe one of those traces next to the damage is broken, couldn't really see it on the video well enough, but the damage looks pretty close to two traces.

[@tomaszstarling1343]

An Epic try brother, you did everything perfectly but sometimes no matter how much you try it just won't work. Amazing video.

[@user-jw7mk6pc2i]

Sorin, don't be sad! You done great job! the videos like that are also need. it is not always win in our work, all good. at least it is a practice and expirience. you are good

[@berberger4814]

I would recommend preheating from the back with a boardpreheater and use a square nozzle in chipset size for the hotair from the front, so you can be more save that you didnt burn anything

[@darcell_pcbiomed5135]

Helo sir, what model of preheater did you use for removing chipset? I want to build DIY reballing machine, preheater and hotair combination. Thank you

[@ratos74]

Sorine, ai facut totul impecabil. Deh, asa e viata ...

[@antonioveloy9107]

An infrared machine can be obtained second hand via eBay for not that much money... Ofc it won't be easy to get into reballing with infrared and using stencils etc. but it's worth it if someone would like to learn the process and always better than using just hot air. Everyone hates desoldering chipsets and CPUs and the only way I do it is with a reballing machine, the risk to fail is to big even if our hot air station is a good pump. Love your vids btw., keep it on!

[@metatechnologist]

You're right reballing is exacting and he needs the right station. But the only way it pays for itself is if he's doing a lot of high end gpu repair or cell phones.

[@steveb1706]

Thank you Sorin for another entertaining and interesting video. I never really trust any items as tested working. If you take your chip, surely it cannot be tested after it was re-balled as it would surely need re-balling again etc. It's the same as people selling phone screens, unless there is some device I have not heard of that will test any screen out there you would need a open phone for every model you sell a screen for. If I am doing an injustice to the sellers then I apologise.

[@2vagner]

You are the Best. Thank you for sharing ♥

[@Pirelli.]

Sorin, don't be sad! You done great job! Have a nice weekend ☺🍺

[@worroSfOretsevraH]

Just a tip on using wick whithout ripping pads: cut down small pieces, and use a larger tip.

[@Umski]

Yep learnt this from Louis Rossmann - I've always used the wick off the reel in the past like Sorin does, but it then tends to wicks the heat away and then the wick can stick to the pads as the solder cools - a small piece is easier to move around on surface mount stuff - everyday's a learning day as the saying goes 😁

[@electronicrepairservice2020]

This is a very challenging/nerve-wracking type of repair with high risk for success. I'm not sure where else you could get a GPU chip since it seems that everything is coming out of China these days. It would probably be less stressful to use BGA infrared machine?

[@francisjah7480]

I like the way you handle failed attempts. you're the MAN

[@MrRvdbeek]

Is this a triller? My ❤was beating like crazy when you did the heating from the back. I see smoke 💨 and think that’s enough hello and you still try and heat and trying to see if the chip was soldered. I was screaming to my phone stop it’s smoking enough. Man this was a nice try and I know you did it great.

[@marksutherland774]

As others have said, cutting smaller wick pieces not only makes it easier, you can hold the hot air gun in the other hand to keep the board temp up to make the whole process alot easier. Don't get me wrong, I wouldn't attempt this, unless I have 2 identical boards to see if it worked, I'd replace the board but great skill without question.

[@laptopDoctorKZN]

Hi . Did you check the pads for the power after removing the chip check if short is gone.

[@saheb1979]

Excellent efforts to fix this damage chip….

[@tanwarcp997]

Sir, your work is very good and helpful, 👌👌👍

[@infringulitula3264]

Sorry for my English but it is more common than you think. It happens all the time used or poor quality chips. Thanks for sharing. Greetings!!

[@VincentTubed]

Thanks so much for sharing. And share the bad seller and leave bad feedback. Those people don't care about our time wasted, it's really bad. Thanks for sharing at least that is a good thing that came out of this! very good to learn from, thanks as always for your great videos and teachings!

[@pp3v42_g3h]

Please get another chipset. And a tip for BGA chips: use leaded solder to clean the pads before using the solder wick, it lowers the melting temperature of the board pads and has a waaay lower chance of cold solders when installing a leaded ball BGA chip.

[@pedroveloso9707]

yeapp. and another trick is to use low melt solder to clean (130ª)

[@Brianck1971]

Do u really think he didnt know that ???

[@vblair2911]

He knows alot but there really ain't a official technician repair school so 1 person won't know all. They don't do these things in universities either. They train technicians in the companies they work for even after passing through college. Its like high top trade secrets. 😳 If u know an official school thou then please say.

[@dev639]

Maybe even though it's not visible there's slight popcorning on the board because it wasn't preheated before removing the original chipset and before inserting the new one. The popcorn effect separates layers of the board.

[@pauljacques4157]

Hello 😊 I've seen that physically the GTX850m gpu is identical to the GTX860m and that the VRAM is also GDDR5. Do I need to change the BIOS if I solder this more powerful GPU on my laptop motherboard or just install the right driver in the Windows?

[@garypoplin4599]

19:28 - Sorin, I’m surprised you’re not using your rosin here for this critical job. I would expect the chip to fall easier into place with the less viscous rosin/alcohol solution here.

[@fbifido2]

what's the cheapest you can get a working board for on eBay or Amazon?

[@gordthor5351]

Is the chip really clean when you set it down on your dirty mat? It might not matter, but it might matter considering how close the pads are together. A little bit of dirt is a lot at the micro scale. Why risk it and lessen your odds of success?

[@GregM]

Tested aka it worked before we took it off the board. We have no idea if after all that heat we applied to it if it still works.

[@KyleSand]

I have a laptop I need to do this too. Considering getting an infrared bga rework station

[@mikes.8922]

Dear sorin, I watched almost all your videos. I love you and your work and big respect! BUT : There are pre/ heating profiles for bga and mainboards.. if you heating heat the board and the chip without controlling the time and temperature, you will destroy the chip and / or mainboard also. They will begin to warp bubble and die. Its also very important to dry the chip for 24-48h in 100c to pull out all the humidity. I was in the business for 8 year's. Anf YES ,you are right! There is also a high chance that the chips are defective. Without a bga rework machine there is no chance to change chipset or cpu. Only small chips. Best regards ❤

[@mitjats]

Why heating from bottom and why the thermal compound?

[@William51115]

still an excellent video!

[@MohamedAhmed20001]

What type of heat gun do you use please?

[@ArthurTugwell]

What brand flux do you use please?

[@davidlguerr]

You need to invest some money and buy a chip infrared soldering machine. Buying chips from China, unless the vendor is honest (which is quite rare), you can get a defective or fake chip. Also, to wick the solder from the board, you should use a larger tip, for more heat transfer. A smaller tip, like the one you used has the potential to rip off pads.

[@tunkunrunk]

it's hard to find brand new laptops' GPU chips . The only way to get one (that matches your GPU specs) is Ebay , and refurbished ones from China

[@davidlguerr]

@@tunkunrunk It is not the only way. The thing is, many chips are sold as new, but they just reball and wash them in a ultrasonic cleaner. If you can see scratches on the GPU, then it is not new.

[@robertjung8929]

@@davidlguerr if china is not the only way , then can you please share a contact to a vendor ? laptop cpus, gpus chipsets... it's china or nothing. most of the time recycled reballed chips , sometimes you find genuine new parts but it's kind of rare.

[@tunkunrunk]

@@robertjung8929 it's been nearly a decade since I started ordering refurbished CPUs from China , and up to know they've been working fine

[@karltest1314]

Thank you for the video. You should mention the supplier - name ans shame, so that others do not purchase from them

[@nightangel6192]

good job

[@mikescholz6429]

Love how the solder ball pattern is a Maltese cross 🙏

[@valinkakomputer]

good job sir, but I wanna share my trick to get this job done without pre-heat machine 1. I remove and install new chip from the back of chip. 2. covered up the components of the back of the chipset with solder mask 3. use max temp(480c) 4. you know the rest I think sir I never failed with this trick, why not to share

[@SaiyedR]

Woow it's amazing to watching you removing BGA chip without BGA machine 😐😲

[@ngwanindi]

Hey sorin I wander what repairs will look like without you. People may say dudgy but we from poor countries who have little or no electronic knowledge learn a lot from you.

[@ZouKun]

you are the best

[@alexmihai22]

Maybe buying 2-3 at once may increase the chances of getting one functional. Also heating from behind will help soldering it.

[@kaiaphasful]

If you protect the middle of the chip from heat, how do you expect the solder under it to melt?

[@markkay8117]

Good point! Hot air gun is not suitable for this job anyway, as there is no control of the temperature really. Proper infrared soldering station with preheater should be used.

[@youasterix]

and then just after resoldering the chip he goes ahead and blow to cool it down

[@hendyp6325]

HELP! I replaced my PCH Chipset, The laptop is turning on fine. UNTIL i opened Valorant and it says that the laptop is required TPM 2.0 in order to play. IDK what it's not detecting it.I looked up many solutions on how to enable it but nothing works. so, i wonder if it could be the issue with the chipset that was installed. What can i do to make this fixed, I'm so tired :(

[@mohammadrazmi9467]

Please always try to say the hot gun’s temperature and airflow percentage. Thank you Sorin🎉🎉

[@BejaiaRepair]

the temperature does not matter, however the time to remove the circuit is

[@jeffsad8391]

I have a question what is that chipset:southbridge?

[@amdradeonview1406]

What flux you have used in this video?

[@Radek__]

after chipset replacement, you have to take out the bios chip, and clear ME region. Maybe this is the reason.

[@giorgostexnikos6976]

excellent job very cleen.

[@robertjung8929]

i would return it or ask for refund no matter how the seller would try to convince me the cracked chip worked :) crack on the chip means it's shot and even if it's not it will be very soon after a bunch of thermal cycles. also it's a good idea to "bake" the chips at 100celsius for few hours before soldering to drive out the moisture, it helps to avoid popcorning (developing bubles in the chip's pcb substrate)

[@user-td4ln4ct7w]

I am really wondering. Why don't you use a stencil for the chip? Those stencils cost around 3$.

[@dorfschmidt4833]

New chip came with balls already.

[@EnjoylThelSilence]

how do they (chinese) remove chip WITH solder balls on it? or do they add them after they remove the chip?

[@TimeToRelax222]

After chip removal they use stencil to put new balls on the chip

[@sodderbridge]

"100% test very good product"

[@elsi75]

Use aluminiumtape or kaptontape to cover and protect the area around bga chip. Dry bga chip for 24 hours in the oven. follow jedec temperature curve strictly. china chips are used and defective most of the time.

[@JazzEnso]

Why you not try dis to uma?

[@user-ry5ei2qi7n]

wow how i haven't seen this video? i haven't seen all video yet but i feel the chip cracking lol

[@user-ry5ei2qi7n]

oh my friend you have skills amazing job i expecting to fail but you nail it the chip was bad but you make it right good job

[@screen-protector]

I know that people don't practise it, but you could grind it ;). When I have components on the other side and I can make more harm than good, I use this technique. But, in general, those jobs are not worth most of the time. At least my customers prefer a cheaper way to fix, than when the see the labour cost high.

[@rolilois9897]

Hello Sorin, i might have that chip in some motherboards i have for spare and parts, send me the chip model, ill take a look

[@ConsoleFixMK]

SR40B

[@TheEli1963]

You need and ir preheating plate for Like puhui t-8082 480c is to much It will melt around 220c

[@baloghferenc1165]

sorin love uu

[@calebbrazeau4597]

cudos 2 you 4 trying but even the manufacture would give you no guaranty 4 work that needed 2 be done yesterday and 4 very little money and if it succeeded word would get out to bring it 2 you with very little chance of making a reasonable paycheck. thanx a bunch.

[@mastermindesrpr]

I think its better to try to find an used mainboard (maybe with a bad mosfet) than changing one of those chips...

[@mancaverepair]

Disappointing when that happens tryed gpu ones there is something different in the solder!

[@Alex-mj7km]

While it is impressive, there is a big chance chip could have died during soldering because all recent chips are kinda fragile and require precise temperature control which you just dont get with hot air. Other thing is that finding a supplier with new chips is near impossible. So yeah, I guess replacing big BGAs is not viable.

[@LagartoPT]

No ... those refurbished chips are just crap , you have to buy five to get one that works. I have a very expensive BGA soldering machine with five points temperature control , and believe me , if the chip is ok they are more tolerant to the temperature than you think , you can ressolder it more than twenty times lead or unleaded.

[@user-vu1nv4qb9o]

@Electronics Repair School What di u expect if u didn'r clean ME region... You should clean it after PCH replecement... Withour inswws, ir will post, bo it may take even a few mins and it's normal that it keeps rebuting, because laptop keeps restarting during PCH inicialization...

[@sabsab692008]

how can the seller be sure the ship is good? could be damaged the moment he took it from other motherboard . there"s no way to test it.

[@davidbates2161]

the quicker the better, preheat around the chipset and bring the heat in from the top. Otherwise you won't get the heat you need. 375* at 60 percent airflow.

[@ralphj4012]

The chances of static damage to components these days is fairly low, but I wouldn't handle such a chipset without basic precautions (grounded mat, wristband etc). Of course, you can't be sure what was used when the chipset was first removed / handled.

[@CoolKoon]

There were obvious signs of physical damage on the chip...

[@MrMagneh]

Sorin, let me guess the Aliexpress supplier! Only one shot. OK. SUHMS aha! did I get it right? Bought a few from them, its a shot in the dark. sometimes they work, sometimes they come with dents on the side of the silicon itself... I was not lucky with the disputes, and did not wasted much more time with it, but yeah. better to harvest from a "known good" donor or smth like that. All the best for your business :) cheers

[@ksrele]

Why do you use noise reduction on your mic? Sound is so muffled... :(

[@MrfB-br6yh]

I use my yaxun 862D++ to replace chipsets and reballing cpu's and gpu's

[@asdfg6528]

@09:33 what flux do you use?

[@electronicsrepairschool]

Warton gel flux

[@asdfg6528]

@@electronicsrepairschool thnx

[@asdfg6528]

@@electronicsrepairschool thnx

[@forsale313]

Over the years I have found that it's cheaper and faster to replace the Mother board (from a unit with a cracked screen). These days they sell really cheap and you have spare parts to boot.

[@SinsBird]

Weird that you didn't heat the bottom.

[@organelec]

could be used PCH locked to another motherboard DELL

[@JustAUser938]

They don’t test the chips. We had to buy an FPGA socket, and mount it to a pcb to test the FPGA’s because we got so many bad ones. Sorin a BGA rework station would be a good tool next.

[@danielbayugar4856]

The end was very sad.

[@daveunbranded]

That was the saddest ending since i watched the Titanic

[@mardina1a]

I’ve reballed of nvidia and ati graphic chips may be moore than a thousand with my jovy brand bga rework station infrared and 90 percent of them worked fine but intel chips was allways not worked actually north bridge chips (south bridge chips usually worked) so i can say that your chip was not working when it arrived to you from china.resoldering of an intel hm chipset needs bga rework station and you need to check temperature of the mainboard to keep under 200 degree celcius you should use amtech cream flux etc.hope you can get your money back from china.Thanks for the video

[@yourambientlight]

Salut ,e posibil de trimis la dumneavoastră un laptop pentru reparare

[@willthecat3861]

Can anyone point me to the vid where Sorin switched from his rosin flux (rosin dissolved in isopropyl alcohol) to a commercial flux? (I'm looking for the explanation of why.)

[@akierum]

I want to know that too

[@fichambawelby2632]

I suffered from the same, Sorin. That's why I decided not to do it.

[@aktiveXkontrol_gaming]

is it possible without using a machine? these boards are made with machine accuracy

[@Sydney268]

Great job fitting the chip using just a hot air gun, but it was never gonna work - the tiniest of chip on the corner of the die does them in.

[@camshaftshaft2711]

My opinion just a little to much flux I spread even with my finger very light coat and you will see the flux pull in then out then in again and the chip will be set ! Get work my friend I love your stuff

[@saheb1979]

But you need to clean ME-Region once time..But I am sure that chip damage from seller

[@dombarton2483]

I always..repeat always buy 2 of anything from china. You just cannot risk it when you have deadlines to meet. Its the safest policy to go by. Just charge your customer. Its cheap anyway. You cannot go wrong.

[@mikyboy77]

When you put the chip on the motherboard at 13:22 time the problem on the right part of the chip was already there before you heat the chip from under the board...

[@intrax2tv]

Sorin you did the best you could using basic tools, but for this job you need a professional bga rework station. So sorry you failed, but that's also because you violated your own rule from earlier video: 'know your limitations'! Anyway makes for an interesting video as always...