Removing glued 2080Ti memory chips. Is there a better way ?

foreign tic net today is a special episode for those who will ever encounter my most beloved Foundation Edition 2080 TI um what initially started as a simple memory module replacement turned into a nightmare so the guy was complaining that he was crashing randomly and that there were artifacts so artifacts generally speaking don't cause crashing so I ended up reballing the core and once they revolve the core and replace the membership I got artifacts on a completely different ships and these chips are glued with that compound to the board and today I'm going to show you how to remove these chips safely without damaging the traces potentially not damaging the traces because if you don't do it right you will damage the trace I have done that before a number of times so I kind of learned the secret and I'm sharing it today today with you so that you will not make that mistake the process of removal this chip is a potential danger to the chip next to it so you always have to cover the chip that's right next to it for example the chip in between is actually already replaced and the chip over there is also replaced so I still have errors coming in in these two chips and the reason why that happens is because when heat is applied compound starts to do starts to move around it starts to shrink and expand and do all sorts of stuff and then if you're lucky uh you're gonna start seeing bubbles shoot from under the chip they're gonna squeeze out onto the side uh that will be an indication that you got this chip too hot and you need to remove it possibly rebol uh if the chip has survived but the problem is you cannot remove this chip safely without killing this chip what do I mean by that what I mean is I'm cranking the temperatures really high so normally I'm not going to tell you what temperatures I'm using because it's kind of irrelevant Norm you know your normal temperature that you remove a lead uh lead free soldered memory chip give it at least maybe 500 more degrees you really want to I mean not 500 I'm sorry maybe maybe 50 more give it 50 more degrees and really bake this thing really get it hot and the thing is you can't really wiggle the chip to see if it's loose or not what you have to do what you have to do is you look at the capacitors around it and once they're all nice and shiny that's your indication that you are ready to force this chip out and what I'm doing is I'm using fine tip tweezers so I'm keeping really close to this chip and I'm kind of going under it and by the way I do have a little bit of flux I'm kind of going under it and I am literally prying it off the board or maybe not so fast maybe I'll add a little bit more flux I can hear this chip is cracking so one of the capacitors flew out gotta figure out where that went it helps to uh note a picture of where everything okay so it looks like the capacitor was right there so I'm gonna I'm gonna remember that so what do I want to do now so we got the chip safely removed and by safely I mean the chip is complete toast but now we have all these um all that nonsense to fix so uh let's let's do that so we're gonna apply flux and I'm taking um a chisel tip chisel tip and uh I keep the board hot and I slowly work my way around lifting all that garbage hold on a sec yeah lifting lifting all that compound off of there it would really help if you had like a picture before you start doing this because there are capacitors that are on the edges see like this guy there I almost got it off and it could be a little difficult to remember which ones which you can always refer to a board view but the board view doesn't really specify whether or not that capacitor was there to begin with so that's all I'm doing just kind of going shaving it off like that trying to avoid all these capacitors nothing to be afraid of keep your tip clean off of any solder when you do this because you don't want your solder blob to pull on these capacitors accidentally just kind of go around every single one of them like so you don't want to scrape the board you just want to scrape the compound but when you start to accumulate all that garbage and you cannot really see what you're doing just wipe it off gently wipe it off and continue on maybe more flux flux makes things easier and you notice I'm not using the nc559 and the reason for that is nc559 is the type of flux that that I use when the soldering job is in and out something quick you know something that you solder back solder onto the board and and done you know but when you're dealing with things like that especially when you're dealing with micro soldering like you're soldering it's let's say a cracked PCB or something I like to go with the vs-213 and the reason why I do that is because it does not turn into a burnt sugar the nc95 the nc559 does it turns into burnt sugar and you can't see nothing it's contaminating the whole thing so now I'm going to add a little bit of leaded solder right there to get these pads going there will be some pads that are ripped most likely they are the no connect pads we'll have to verify if we ripped anything off hopefully not but I think I already see a couple of things that may have been damaged it's kind of unavoidable but most likely if you're if you're applying enough Heat yeah and you don't worry about the chip which you shouldn't then you're gonna be fine maybe bring a bigger tip here there we go okay so let's uh let's solder that one capacitor back where it belongs right there right there okay okay let's clean this area up here and we're gonna continue on torturing the second chip or maybe we're not done here yeah looks like we have some pads that had been lifted along with the chip so even after doing it for so long still hard to do but at the very least I don't think we're gonna those are the no connect chips okay so it looks like they're all no connect but we'll have to see it there's one chip uh one pad here in the middle uh that's ripped I I have to check what that chip is we can look at the board View file and look real quick so that's gonna be what it's gonna be right in the middle gonna be one two three four five six seven eight ninth down in the middle okay let's look at that chip ninth down hold on a sec let me bring up the board View this is this chip middle ninth down one two three four five six seven eight nine so this chip is it looks like it's paired with the chip that's right down below it looks like it's a command chip command pad we'll look into that we're not going to solder a chip right now we're gonna look into that later maybe we can fix this pad right now I want to switch over to the next chip the next chip is also bad so I'm trying to preserve the one that's right next to it right there and I'm trying to preserve the one that's on the right so maybe we can no I don't want this flux I want different flux okay and let's bake the crap out of this one you could bring in the probe and just you know monitor the temperatures to see like exactly where you're at if that's your thing might as well you know for the sake of the experiment let's just do that let's do that so I got the probe right here 300 350 370 so I'm 380 at the probe 390 so I'm going to try to crawl crawl under the chip with my tweezer keeping it as hot as possible and 400 I'm trying to lift there we go okay the chip is out hopefully we got a little bit luckier this time and uh maybe none of the pads got damaged except for the no connect ones for which we don't really care let's see if I can Maybe remove some of that solder before I start cleaning the that stuff away that seems to work okay it seems to work oh looks like we got a capacitor removed I'm gonna get that placed back down am I going to be able to solder that capacitor back on I think I will I think it came from here somewhere so let's see if I can find where that capacitor came from I think it came from here okay all right all right let's put that capacitor back on there or at least try that thing is Tiny and it is dirty in here okay I gotta clean this place up because that capacitor is not going to be happy sitting under it and there's another capacitor right next to it that wants to get ripped so let's go ahead let's go under a microscope this is just getting a little bit out of hand a little bit out of hand okay okay so this guy here is on compound too see all that garbage there this is ridiculous absolutely hate that stuff absolutely hate that compound stuff it does not help anything why is it there I don't know okay so One's Gonna Go in here the other one's gonna go there I'm gonna throw in a little bit of solder so that they have something to grab onto right there and a little bit of here right there all right now let's see if we can put those back down you're gonna go there and you're gonna go there okay okay I think that looks good all right now let's look at what we've got going on all that garbage continuing with the removal of all this garbage you want to be careful not to scrape too hard because you could damage the traces that are going around especially when you're scraping the middle absolutely hate this any other card this job would have been done hours ago but the founders Edition good luck with that see and we didn't even rip any of the pads off from this one we went just a little bit hotter on the temperature a little bit more persistent and we succeeded far better on this side than on the left and we still have a couple of pads that are ripped those are the no connect um there are several pads on this on these 2080 TI's that are not used by anything so let me go ahead and clean this up just one more time thank you okay I think this is looking fine this is looking much better I see something here in the corner I don't know what it is I'm gonna go look under a microscope and double check some kind of a spot I don't know what that spot is let's look at it real quick foreign looks like a little bit of mask left off don't care so in here the the no connect pads lifted okay and in here um if that if that scares you this is actually isn't that scary none of these pads are used so this one's not used uh but this one looks like we might have to fix this pad this one's no use so I'm going to go ahead and fix this pad real quick and I'll be right back soldering the chips back on the board and hopefully the heat that I applied to this chip to remove did not affect this one hopefully I don't know if it did I'm gonna have to replace it too but the last time I ran the memory test this chip did not report any problems only ones that were under the compound so we'll see I can probably go ahead and check for resistances right now well not right now but let's see it's too hot to check yeah well we don't have a short on the memory rail so if we're reading above zero we don't have a short and then that's PEX and that's 1.8 so no short 39 ohms this thing is ridiculously hot right now so we're gonna I'm gonna let it cool down and I'll continue on with the testing see if we screwed anything up today or maybe we gotta fix wouldn't that be great all right let's check for resistances one more time just to make sure that we don't have anything low 15 and memory 1.8 hex okay so we're good I think uh I'm not gonna power I'm not gonna plug it into the computer just yet never know what can go wrong better be safe than sorry it's very tempting to just hurry up and plug it in and run the test but as I've seen again and again that could lead to a disaster okay one and a half amp looks good nothing blew up unfortunately maybe next time but this time we're going to run a member test and hopefully we get a pass this time because if we don't hopefully I didn't kill any of the neighboring chips because there's always a risk there's always a risk that you're working on one chip you're accidentally killing the other what can you do about that you can try protecting the other chips from the Heat but that usually isn't the problem however this is their unusual situation here because we had the compound so but we've tried to do our best because we were intentionally frying these chips in order to get them off the board so let's see I want to see a pass or at the very least error on a completely different chip or maybe one that we installed earlier no I think it's gonna pass it looks good it had artifacts all over the place so now it's pretty good we're going to get a pass and we are finally done with this one for today what a day perfect this is it this card originally came in with the complaint of artifacts and crashing so artifacts are 100 memory related crashing could be core related so my first step was to rebull the core for that reason and then I was dealing with the artifacts the first one first one first chip that came the original one that was dead was this guy so I got that replaced instantly it caused this chip to go bad so once I replace this chip these two got bad and so you could see that um things got South pretty quickly and thanks to the compound if if this if this wasn't for that stupid compound these chips would probably would have survived even in this one even this one all three of these they probably would have survived if it wasn't for the stupid compound when if there's the shrink and expand I wasn't even working in this area this chip was the first one that died that that had a compound on there this chip died first but I was working on this one here so the heat for whatever reason caused solder balls to just shoot from under the chip I don't know why I wasn't even applying a whole lot of heat in this area I was just you know working in here but whatever happened happened there's no guarantee that nothing ever goes wrong so I hope you guys learned something from this video uh me sharing a little bit of um know how to remove this compound at least the way I do it and um it makes it makes sense if you have extra of these tips one tip you know for like Dirty Work specifically for that kind of stuff and then you can keep your other tips separate for you know everything else that way you don't ruin your favorite tip and then you know it's gonna end up costing you a little bit of money because these tips aren't cheap thank you for watching hell blessed day goodbye

Channel: northwestrepair

Views: 27,147

Keywords: best, how to, repair, fix, diagnose, identify, findout, lightning, boot, detect, nvidia, artifacts, micron

Id: tLws_71Z0qE

Length: 32min 43sec (1963 seconds)

Published: Wed Aug 09 2023