Nvidia GTX 1080 Repair #2 - Computer won't power on
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- Опубліковано 8 лют 2025
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Datasheets
4C85N - xdevs.com/doc/...
QM3003M - datasheetspdf....
This is such important work. That's one less PCB with all it's shard plastic headed to Mount E-waste. Thank you!
The basic steps at the beginning really gets me interested with your gpu repair videos
Wow literally just finished last vid and here's another, great work always very informative!
One of the best explained and detailed videos i've seen, thank you
I’ve waited for your videos to come, nice work ✌️
I love these videos just sent mine in hopefully can get fixed! Glad I found this channel.
Really wonderful video. Wonder if you'll do a special video for newbies who wanna GPU repairs. To learn basics and all. Thanks again for video. Truly appreciated. (a fan from Nigeria)
good channel to start w/ basics is Zoras Tech, they will explain how to identify what components is what (in general) and more
Amazing video, keep them coming !
This video is awesome. I have this exact same card with this exact same problem. However the burned transistor fused with the board, like you mentioned in the video, and the solder pad looks like it's ripped completely off. Is there anyway to fix it?
Maybe it's confirmation bias but a lot of these dead cards are mostly the cheaper ones with the standard NVIDIA PCB design lol. I have had the same experience personally. Had two GTX 780's with reference PCB that died within 3 years (EVGA), where as my custom MSI PCB 1070 is still running fine despite near 24/7 operation for 3 years.
Yep, Reference Nvidia PCBs from this era are more or less a disaster.
Reference cards have everything wrong. Lower phase count so more current per component. Lower current rated mosfets. Blower style cooler that moves less air. They're built to survive the warranty period.
@@TechCemetery The 30-series FE PCB's seem to be of good quality, better than the reference design they sent to the AIB's at least. I wonder how they will last over the next few years, because the components are definitely packed tightly on there (and those memory modules get quite toasty, I've heard they go as high as 115 C when mining on a 3080 FE). Considering the insane volume currently being shipped I'd imagine 2-3 years from now you'll be handling a lot of Ampere cards, maybe even a lot of FE's.
Dear Tech Cemetery channel owner, I am impressed with Your skills, especially component failure tracing over multiple components, when no schematics available. And when You say, You have never studied electronics, it just blows my mind. 'Cause I have, and my skills are far from Yours. :) Also, the way You describe what You are doing is very didactical (if I can say so), always starting from search of shorts and measuring the resistances before You flip the power switch. It is especially important for those, who is just starting such repairs.
What I also wanted to propose, and maybe other subscribers will agree. It would be nice if You could justify Your channel name - to show us also Your failed attempts of repairs, where You come to conclusion, that the repair is no longer possible/economical with the explanation what symptoms and measurements leads You to the conclusion. In my opinion such videos would give us great experience and would show to us when to just stop digging. Thanks. AND BIG THANKS for what You are doing, please carry on.
@raven_uk My man doesn’t fail.
Love the vids - just one question; in all your videos you check the 12v and 3.3v pci-e rails on the board. If either are shorted is it basically a dead card? (Edit - when I say dead I meant unrecoverable, i.e. most likely a dead gpu)
It just makes it easier to narrow it down
For my card i had no easy to find issues but did find it eventually
I have a shadow busted high-side mosfet (shadow as in visually fine electronically fuggered)
I also have a dead SMD cap so will replace all 4 as it has 4 of the same
So when i go to fix it once i have the finds for tools i will be taking off the mosfet and seeing if the short goes if not then i probably also have a dead mlcc capacitor or multiple
I need a heatgun and nozzels alongside a solding iron and the components coming to a £80 repair attempt and assuming i cant fix it a waste of £25 odd and gaining of 2 tools for use probably never
@@commanderoof4578 is assumed that these would be potentially fundamental power lines to make a quick go-no go call on if it’s worth salvaging. Personally I’ve only come across the 3.3v line shorted once on a gtx690 and it was impossible to identify all the components that utilise 3.3v especially when it’s shorted to ground! Unfortunately injecting voltage didn’t help much either in my case as the gpu itself started to warm up so I assumed the worse and scraped it.
@@johnwalker2468 well its not because i dont have a short on 3.3v 5v or 12v but i do have a short from all mlcc caps connected to a particular mosfet and using continuity between the 2nd from bottom pin to the other side i get a short
And i dont get the same short on any of the other mosfet of which my card has almost 20 total
What you need when the component is welded to the board is a grinding pen. Just grind the component from the top till you get down to the pads instead of ripping it off.
my not so reliable multimeter that line gets me everytime lol
Great info here, love it
Thank you for one more great video!
Your air gun is literal magic, or mine is lying about it's air temp. That was not this easy for me even going to 480C
YOU R A GPU GOD. And a damn good one :) Thank you for another jamb-packed geek fest.
si it is critical to choose the right power for a psu, like i you use a high powered psu like a 1500w psu, its overcurrent protection of course will be above that, is short happens ang it consume power below that, the card will continue to burn without psu shuting down
I have the exact card, question, when checking the resistance on the pex rail, I'm getting 67.5 ohms, is that still with heathy parameters?
Thank you for sharing all of your knowledge! I have a 1080 with the failure you described at 6:45 (failed MOSFET on memory VRM). The inductors on the bottom right are burned, just like the ones you showed here. The main difference is no burn mark next to the MOSFET and no bridged 12V to 1.8V. Current balancing transistor also looks ok. VMem is shorted to ground, and the inductor next to the MOSFET is cracked. Is this very likely a dead GPU based on your experience? Or do you also see cases with this failure mode where a single memory module is shorted and GPU survived? Looking forward to more videos and streams!
If the memory MOSFET is dead, you can dismiss the card as having a dead core with well over 95% certainty.
@@TechCemetery Got it, appreciate the insight!
Can you tell setting of hot air? Temperature and air? Nice video, i love your channel!
I have a Quick 861DW that I set to 788*F and 100 for air.
@@TechCemetery thanks a lot
@@TechCemetery I'm trying to break in to hot air rework e.t.c. I have the same machine and use amtech flux in the tube. When you pull a bga do you use a bottom heater? And what kind of temp required with out a bottom heater if possible thanks in advance. Cool videos by the way can tell you've been doing this for good while.
@@TechCemetery That's 420C for the rest of the world ;-)
@@alreed2434 I generally don't use a bottom heater except in some rarer situations where plastic may be melted etc. For a preheater, I would go with 140*C
lets go! keep the vids coming :D!
I have to ask, what is the purpose of the four inductors in the bottom right corner of the board
•As always, very good and impressive! Do you do this as hobby or you studied electronic?
•Thanks for your time and videos. 😃
Hobby, I never studied electronics
@@TechCemetery I am so impressed!!! I working on computer repairs but I do not have a quite knowledge like yours!
Good stuff man. Thanks
Hi, where can i get this 4C85N MOSFET? I have this exact same problem
you are a magician
Don't you have a nice Fluke 179? Why aren't you using that instead?
Where can we buy these resistors/chips which we need to replace ?
Failing/bad bios may cause gpuz to show wrong info ?
Hey. I need some assistance with a zotac amp extreme 1080ti. Card was working fine now it doesnt display ive tested the card voltages etc but im not getting anywhere. Can you help
Hey do you know where i can find a replacement for my 734DEH WSC55 mosfet?
I would have test first if short is still there but great vid
hope you are making a decent profit fixing these.
How long does it roughly take you to diagnose and repair a card?
Great job 👍😀 Have you made an ebook? I think it would be useful guide for anyone wanting to learn, you could sell it on amazon 👍
Do you live in the UK because i have a dead 1070 (gigabyte 1070 mini itx) in need of 4 SMD caps and a new high-side mosfet
Could be other problems that i cant find such as maybe a busted mlcc cap along side the mosfet
But i dont have the tools or parts to repair it and would love to send the card in for repairs but only if your in the UK otherwise there would be import and export taxes and stuff in the way
I know someone who lives in the U.K. that takes GPU repairs and is quite good at them. Send me an email, it's listed in the about section of my youtube channel.
hi, i have two 1080 not detected problem. can you help my to fix it?
Nice work.And by the way Northridge Fix is hiring tech for graphic card repaires if you are interested...
No respectable repair guy would work for him. He doesn't know jack about diagnosing stuff. His method of "fixing" things is changing as many parts as he can in 10 minutes.... and then quitting if that doesn't work. Better to slow down a bit and use your brain cells and test equipment.
Hi, thanks for your video, I have two rx470 cards that do not pass the stress test, I have already changed bios and it behaves the same, what should I check? Thank you
hi..do someone know where can we get graphic card schematics?
Hey! Do you know if the memory voltage rail is connected to the gpu on the RX 400/500? The memory controller voltage rail I know that is, but I'm not sure for the memory voltage rail
i have mine 0mb memory size shows in gpu z and also the bus and bandwidth shows none too.
very strange to see that many missing caps on the chip ... do you have a guess how it happened? I´m not at all careful for them when cleaning with toothbrush and IPA - never lost a single one.
Dropped the heat sink on it and scraped them off, I suspect.
Hi gigabyte 1080 g1 8gb ,fan spins checked all voltage no short but no display gpu geting hot, i boot pc from integratet hdmi and at the device manager showing a
card with a triangle but when i try to install driver pc going on blue screen ,gpuz software not showing gpu clock and no gpu memory, i can load Firmware with nflash to gpu but still no display.Can you help me. Thnx great Video
Try a memory test, I have a guide video on diagnosing cards with memory problems.
@@TechCemetery MATS dont make a report file after diagnosis i just followed all your instruction on those video by the way thnx
I have a 1080 founder edition that's busted, any chance we can get in touch and you can lend a hand in fixing it ??
I have an email listed in the about section of my youtube channel. Additionally there's a discord as well which I would prefer you try first.
Would you be able to fix one that had milk spilled on it and fried it while it's running?
Probably, depends where the milk spilled.
@@TechCemetery Around between the Nvidia square and the 6x R22 squares. Possibly onto the R22 square area.
You are god damn wizard
Guys important question! Where i can learn how to fix video cards?
Learning by doing and UA-cam. I would say that’s the best way
Just watch all his videos he has mad knowledge and explains very well so we mere mortals can understand 😂
Start trying to learn how to solder on junk boards. And don't buy junk tools it will save you money time and frustration.
i live in italy .. i have a rtx 2080 that makes strange artifacts .. i would pay any price to fix it
Hey bro! I have an 1070ti MSI no had vídeo. You can Repair this Graphic. I pay shipping and donate your canal about 60 dollar maybe 120 🤠👍
Send me an email. I have one listed in the about section of my youtube channel.
@@TechCemetery i send two mail 🤠👍
it is the same pcb as an evga 1070 sc, exactly the same wow
I have another example of the 1070 you shouldn't buy. Bought it off ebay and yeah. It's burnt in all the wrong places....
Wow Raytracing on GTX 1000 series GPUS hahahaha 7:10
Do you accept international repairs?
Yes, my website is linked in the description.
@@TechCemetery, I already submit request in your website.
"90 or so ohms" = 90.0. 👍👍
How can you say your pcb skills suck its not normal to be able to solder tiny caps on The die itself you God 😂 I had the up9115 weld itself to the board that was horrible to remove alone with some pads and traces I managed to replace pads and traces with coiling wire very skinny 😂 but the card still reports 0.0 usage and stays idle but gaming still working just no voltage control or boost clocks but card stays constantly below 55*c so still using today 😂 need your godlike mind and skills to fix properly ❤️💯
Heh, do you have discord? if yes send me an email.
@@TechCemetery hey can you help me fix a MSI GTX 970 not detected to see where are located the main voltages it was working then I remove it for a better one and now I put it back and is not working weird idk why
@@graphicscardtech3167 whatch Evans 970 video board different but. Should help u identify the components you need to check and the resistances should be pretty close to what ur msi card has
@@ewardw6062 it’s so different and I have another one MSI GTX 980 Ti with a short on 3.3V I believe is Ram I don’t know 🤷
@@graphicscardtech3167 the only card I've seen with a 3.3v short was a r9 270 and that was in the end the gpu chip itself you would have to follow the trace and check the components connected to that hopefully you have a bad cap somewhere
THATS A 1070 NOT A 1080
Pure electronics pr0n :P
Thanks for another great video.
Super cool! Great work!