That's why i don't replace chipset/cpu/gpu :((((((((((((((((((((
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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.
That or just use a lot of rosin based flux, use fine wick, and make sure your tip doesn't have a sharp or blunt end. When i first started i ripped a lot of pads, but i was using a fully synthetic flux, i switched to a rosin based flux which acts as a lubricant when burned and haven't ripped a pad since.
If you return the chipset then they will sell it to somebody else. 100% tested by Sorin.
😂
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.
return this chip to China will cost more than order 2nd chip, Chinese kung-fu tactics 🤣
@@kiki83607 good point lol
@@kiki83607 "kungfu tactics" 😹
After chipset replacement, you should almost always clear the ME region in the BIOS. But it probably won't help with the crack either.
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.
@@MrHimer12 Why does this ME region crap exist ?
@@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.
@@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.
@@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.
An Epic try brother, you did everything perfectly but sometimes no matter how much you try it just won't work. Amazing video.
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...!!
Nice Removal.. Quick and Clean.
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
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.
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.
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
Just a tip on using wick whithout ripping pads: cut down small pieces, and use a larger tip.
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 😁
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!
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.
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
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 ❤
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.
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.
Sorine, ai facut totul impecabil. Deh, asa e viata ...
I like the way you handle failed attempts. you're the MAN
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!!
I recently replaced one of those SMD resistors. It was risky but I did it and it worked successfully.
omg this is so cool! best of luck to you buddy!
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
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
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.
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!
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.
Why didn't it work?
@@irishguy200007 Because the chipset from china is cracked in two spots. The chance of that chipset not being faulty is slim to none.
You are the Best. Thank you for sharing ♥
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.
yeapp. and another trick is to use low melt solder to clean (130ª)
Do u really think he didnt know that ???
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.
Great video! Appreciate you sharing.
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!
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?
Bad bad idea to change bga with hot air.U can burn the chip.You can make deformation on motherboard.You have to warming up 170 celsius down side and no more 235 on the top side.You need special tools,but u know that.
True
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.
Dear , tahnks for sharing this useful video, next time you need to pre heat the chip for hours at 90° to remove the moisture from it, i replaced many chips and learned from the hard way...
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.
Sir, your work is very good and helpful, 👌👌👍
So we are back. And this time we have a NIIIIICE package to open. 😃
We have a NIIIICE chipset to replace. 😊
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.
Love how the solder ball pattern is a Maltese cross 🙏
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
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.
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
SR40B
Please always try to say the hot gun’s temperature and airflow percentage. Thank you Sorin🎉🎉
the temperature does not matter, however the time to remove the circuit is
I am really wondering. Why don't you use a stencil for the chip? Those stencils cost around 3$.
New chip came with balls already.
still an excellent video!
Hi . Did you check the pads for the power after removing the chip check if short is gone.
When you see guys like Northwestrepair doing huge GPU cores every single day... it's pretty remarkable. Of course they use IR machines, as far as I know.
after chipset replacement, you have to take out the bios chip, and clear ME region. Maybe this is the reason.
Woow it's amazing to watching you removing BGA chip without BGA machine 😐😲
I stopped using kapton tape because when it shrinks it will shift underlying components. I use regular aluminum foil for shielding.
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)
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.
Sorin I like your videos, funny and somhow you butcher the things, but still can repair :). Like Rossmann is so careful, and always follows schematics or boardview , but you go state by feeling hehe.
wow how i haven't seen this video? i haven't seen all video yet but i feel the chip cracking lol
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
I use my yaxun 862D++ to replace chipsets and reballing cpu's and gpu's
How do I find out what GPU upgrade my laptop board can handle. Thank you for putting out content
"100% test very good product"
The end was very sad.
That was the saddest ending since i watched the Titanic
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.
good job
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.
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.
If you protect the middle of the chip from heat, how do you expect the solder under it to melt?
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.
and then just after resoldering the chip he goes ahead and blow to cool it down
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
I have a laptop I need to do this too. Considering getting an infrared bga rework station
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 :(
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.)
I want to know that too
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...
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.
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?
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.
just replace the whole motherboard, don't even waste 1 second with this kind of replacement.... not worth it.
40 £ + waiting time, vs a working used motherboard on ebay at 100 £ ....
show me this board on eBay for £100
What type of heat gun do you use please?
you are the best
Sometimes skill and experience cant fix everything and thats the unfortunate reality of the repair business
Dear sir.
Please tell me temperature smd
How to change without bga machine this chip with smd
Love you videos man a real engineer.
But why try and replace a bga with the hot air wand ?
The only way you will really be successful is with a hot air rework machine with underside pre heat and top heat.
The maximum temp that ic could handle is probably 250c for 30 seconds if your lucky, blasting it with just topside heat at 480 is just going to thermally shock the ic.
Further to my comments if the bga replacement isn't perfect don't even bother soldering it on.
@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...
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.
Disappointing when that happens tryed gpu ones there is something different in the solder!
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.
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.
excellent job very cleen.
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.
how do they (chinese) remove chip WITH solder balls on it? or do they add them after they remove the chip?
After chip removal they use stencil to put new balls on the chip
I suffered from the same, Sorin. That's why I decided not to do it.
You need and ir preheating plate for
Like puhui t-8082 480c is to much
It will melt around 220c
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
Mr Sorin you can't just remove the PCH using a hot air station, you need a BGA machine with bottom and top heat, you are just damaging the board. Okay fine let pretend you removed the PCH chip using the hot air as you did, obvious it won't work, you have to clean the ME region...Lol this is getting out of hand, Lol there is no shortcut or dodgy way here...This seperate boys from man
The hole moved
could be used PCH locked to another motherboard DELL
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.
There were obvious signs of physical damage on the chip...
Why heating from bottom and why the thermal compound?
i know you will fix it i love you sorin
This is a challenging BGA to replace with just a hot air gun. I'm not sure if it can be done... At least get a basic pre-heater.
ua-cam.com/video/E1t4lHaFRhY/v-deo.html
Intel's 200-300 chipset series and later are very sensitive. Replacing it with hot air is the wrong method. It would work if replaced with a BGA device. hot air is not supplied directly to a BGA chip. It has to be gradual.
I know some chinese are taking chips from scrap and selling on aliexpress... but always less cases. They are going good way
what's the cheapest you can get a working board for on eBay or Amazon?
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.
I can't believe what I just saw...
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...
在淘宝买东西。你千万得长点心，多买几个，比买一个好。
翻车的概率，不小，拍好照片。让卖家退款或者补寄一个。
这是没办法的。一旦商品价格低于运费。最好不要寄回去。
可以要求卖家赔偿。一般都退运费的。
淘宝这种东西都是二手拆机的。很难说不出问题。