 So a short while ago a gentleman by the name of Lewis Rossman watched my video where I baked a video card and made a video response outlining what an idiot I was He said a lot of bad words and a lot of mean things Very often the issue that somebody is having when they have no video or something is dead is not an issue that you're going to Fix by taking a heat gun to it by putting it into an oven by burning it so I I showed up here in New York City at his shop to either get an apology out of him or for him to Restate that in fact he is right and show me his super fancy soldering rework multiple thousands of dollar setup that is Actually how you repair graphics cards or other PCBs properly let's find out which one of those things it's going to be Okay, so Employees only means nothing to me, so I guess we'll just Go ahead and head inside Look at all this stuff. It's like Linus's paradise broken max Knock knock So Here we are the way I see it. There's there's a couple of there's a couple of options here. You can either Apologize and say I was right and you were wrong Or there's the much more likely scenario where you show us the super cool piece of machinery that you use to properly repair all of this stuff So this is Lewis Say hi to the Linus tech tips folks. I'm sorry for your right hand Oh, yeah, no, no, that's no problem so guys This right here is where the magic happens one does not repair PCBs in an oven one uses one of these that is to Say if one can afford it how much does one of these cost about? $7,300 about $7,300 and Lewis here is going to walk us through the ins and outs of how this bad boy works Including you said you obtained a donor board do I actually get to operate it? Oh, yeah You're the one who's gonna be putting this on that's the whole point of having you come here is to reduce my workload Fantastic let's do it. Okay, so I think we all saw this coming He's not apologizing and he is definitely showing me how to do it the real way So this right here is a PCH that was Sourced from somewhere because you can't actually buy this stuff directly from the manufacturer. That's one of your frustrations, right? Incredible, so maybe it works. Maybe it doesn't and then behind me We've got a PCB from a main board that was literally thrown and had its PCH pop off So without knowing if that works and without knowing if this works we are going to re solder this BGA chip Onto that PCB. I'm gonna do it and it is not gonna involve an oven and it is hopefully gonna work. But if it doesn't then That would be pretty fun. Yeah, it'll be fun either way Okay, so step one is we want to tighten up these little retainers that use the mounting screw points And without ruining it too hard they use the mounting screw points on the PCB to hold it in place as securely as we as we can Next we pull out this fancy pants camera So we get a live feed right here of the solder points on the main board Next step we turn on the manual vacuum right here. We take our PCH We orient it correctly, which I mean is there some guesswork involved there? Google image search and try to find the GIF that's above 50 by 50 pixels like I did five minutes before you came here Perfect. So we put this sucker on the little vacuum right there hoping that it doesn't come off. There we go So we've got a ring of LEDs on the top. We've got a ring of LEDs on the bottom That makes sure we've got great illumination from all angles both down here and up here And then what we've got on this display are two superimposed images So the brown version is the one below and the blue version is the one above and the idea is that we use our horizontal and vertical adjustment knobs here as Well as our angle adjustment knob right here to try to align all the blue dots with all the brown smudges below them Uh-huh, so as soon as I align it there it stops aligning up there Feel free to step in and correct what I'm doing at any point in time You can give yourself more lights you can see over there. Hey, there we go. You can zoom in and out How far in can we go I honestly can't tell but you have no way of checking if it's right until you just yeah You don't know if it's right until you put it on. I'm just looking at one corner at a time So you see that one's the line. Yeah, this one looks okay. This is a pain in the ass So is this pretty aligned? Okay, let's get yourself a thin layer of flux on there. Okay For the next step we will need the gloves So now we put just a line of flux just right on the middle Yeah, so with the flux in place we use this clean room wipe as you can see we are in a completely professional clean room environment here So now we've got to check and see if our chip moved out of alignment from messing around with it This thing messes with your eyes after a while man. Let me tell you Are we back on? I think that's actually good. Okay. I would say this is good Okay, so next we move our light out of the way and we actually lower the chip Whoa, that goes really fast. Oh It's gonna stop. Oh, okay. See right now. It's touching the board once. It's touching the board Once it's touching the board then you turn the manual vacuum off and then you go back up Okay, now you can move the camera around and try to get it to focus. So you're you're almost in focus. Okay, there you go So now we can see the balls. I can't I can't make heads or tails of this image though. You got to be kidding me here Okay, the point of this is just being able to see when the solder melts So this allows us to see under it enough to know when we should apply heat and when we should stop applying heat to solder the connections Okay, so hit me with your best shot Hit start and you hope that nothing blows up Seriously? Pretty much So at this stage we're actually ready to use the infrared heating elements all around to heat the general area and then the two heating elements on the top and bottom to solder the chip to the PCB But it's not as simple as just the 200 degrees Celsius in an oven, which I noticed they have an oven This is high quality right here Yeah, I noticed you do have computer parts in your oven. Was that just to make fun of me when I got here? Exactly What you do is if you want to clean them off after you're done ultrasonic again You put it in here to get rid of the moisture before you do anything like this You also have to put them in an oven at just around the boiling temperature of water Just to get rid of any of the moisture that built up in the chips Or else you get things like popcorn And there I thought I was getting my apology after all Alright, so what we do here is we have these profiles and it comes with some pre-programmed But they're not very good so you kind of have to trial and error it or use your experience or share online To figure out what exactly the temperatures are for the period of time and the ramp up and ramp down For each of those three heating elements And then once you've got a profile you press start and hope nothing catches on fire and hope that the solder melts So once they melt if the profile is set to run a little long we can manually stop it And then start a manual cooling cycle in order to cool everything back down to a reasonable operating temperature Wow it's really hard to tell So is it, is it, is it, is it melted? Stop So we're stopping it now, we're deciding it's melted even though it's really hard to tell, okay Manual cooling and now you get to watch the balls dry Okay It's important to dry off your balls when you're done any kind of repair on them So now that the cooling cycle is done we lift this bad boy up Is that all it lifts up? Oh there it goes Then Mr. Shark grabs a PCB and whoop whoop come on And we put it, that was it we're not going to let it cool down some more I'm going to take a look at it first This is the part of the class where the teacher is like you know oh this part's kind of good but this is shit But your attendance is excellent Suspense You want to look on that one? You want to look and see what it looks like? Sure yeah let's do it Alright so let's have a quick look here So what we're trying to see is whether the balls got soldered to the pads Your guess is much better than mine at this point in time Let's see if it works So we're just going to fire it up and YOLO? Yeah So here we go moment of truth we're going to find out if a fan turns Come on baby I believe in you Oh we got a flash of light And we've got 5 volt so it's powered Got 3.3 volt on another test patch Yep not good My bad luck rubbed off on it We didn't fix it but test subject 17A contributed to the betterment of our scientific knowledge In some way that who am I kidding we didn't learn anything today But thank you guys very much for tuning into this episode Of how according to Louis Rossman one would actually fix something that had been If it had been damaged by you know something like micro fractures in the solder joints or whatever the case may be Because remember whether it's a GPU like I very temporarily resurrected in the oven Because that won't last very long Whether it's a GPU or whether it's something else There's a hundred things that could be wrong with it other than that And you actually have to know what's wrong with it before you can attempt any kind of repair So while I actually stand by the oven method as a way to put off buying a new video card while you save up for another few weeks If you are completely out of warranty and you don't happen to have a $7500 rework station It is not the real way to actually fix anything and I'm glad that I got to at least try to do it properly So thank you very much for going through this process with us and being a good sport about the whole thing And thanks to you guys for watching Whoa! 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Maybe check out the video that started this whole controversy Where I baked a video card and did manage to resurrect it However temporarily it might have been and made this gentleman mad in the process So mad that I had to come all the way here to New York to make him feel better Hopefully that's not how you feel better