you may not get many viewers that will stay and watch the whole video, but those that do stay greatly appreciate your hard work!!

Nice video, thank you very much. May be as an idea, I saw some similar videos from Russian guys and they all told, that if on of the MOSFETs blew up, it is usually not sufficient just to replace it. In the best case it will work for another week or so and, in the worst, like in yours, it will blow up immediately again. They say, that if you have to replace a MOSFET, you always also have to replace the controller, because it usually is the reason, why the MOSFETs blew up in the first place anyway.

"we did actually burn test this one" You sure did! 🤣

Dude, this is epic. I never knew it would be such an emotional roller-coaster. Haven't watched to the end yet but I'm rooting for you

I CANNOT TELL YOU how GOOD your content is ... and more importantly, how SUPERIOR your educational value is to anything I've seen.

YOU ARE REALLY AMAZING. MY REGRET IS WHY I DIDNT FIND YOUR CHANNEL EARLIER! A GOOD CRAFTSMAN ALWAYS SHOW HIS MISTAKES SO WE ALL DONT MAKE THEM! YOU ARE EXCELLENT EXAMPLE! REALLY LIKE YOUR TROUBLESHOOTING CYCLES!

I am watching you solder at 2am and find it fascinating. Love your videos 👍

I paid 15k for electronics school and I learned more in this video than I did in 2 years at school.

Oh yay! I just watched the ghetto fix and was hoping there was an update video, and behold, here we go! Thanks again for the great content!

I’m watch these every night before I go to sleep. Wonderful info!

Thank you for the details and explaining clearly how all this works. Very helpful. Would like to see more.

Please try to do it you are the best guy explaining well throwing out lot of knowledge and experiment

Bravo, Graham! Super informative and entertaining.

I really like your channel as you don't floss over problems but show everything warts an' all, well done keep it going.

I would guess the driver chip was turning on the high side and low side at the same time common issue with switching supplies

That was really entertaining. Shame it didn't turn out as you hoped but hey, after all the replacement surgeries and explosions you still got it to work. That's a big win in my books. Keep it up! :D

I have tried these MOSFET replacements and failed each time. But I never tried to dig that deep and improvise. Thanks for very interesting video!

Thank you for the interesting lesson.

Love your determination and commentary.

"It's Turbo dead! Ohhh Nooo" thank you, thank you, Thank You!!! I will be bogarting this quote over and over. Thanks for being human!

Great video. Know how buck converters work, but never though about how they're used for multi-phased VRMs. Thanks for the education.

thank god for these videos. I have a evga 960 that had a similar meltdown, Inductors exploded and it shorted, and the fan bearing blew out. the blue pcb burnt to a brown color. hoping it didnt destroy the traces in the pcb, that will make this repair a thousand times harder... But i wanted to try and practise repairing components. And this video was exactly what i needed! thanks a bunch!

Great video & with a great deal of patience, well done :)

I always watching your videos, and thank you that u mentioning the degree Celsius of hot air. Make more videos where here and waiting and starting learning

Thanks for your videos. I'm really getting interested in electronic boards and their components now :-)

that was crazy long and so educional video ! Respect for making videos like this to people understand little more more stuff :)

Brilliant! Loved this video!

Thank You. And yes, learned alot (and I was sure I knew everything🙄). I enjoyed the magnum length video version. I ordered a pizza and told my GF to get lost. OK, I didn't do that.. I just let the air out of her 🤤 Anyhoot, you fought the good fight. Think I will pickup one of these classics. It will feel like an old trusted friend. Cheers 🇺🇸😁🇬🇧

i learn a lot with this Honest vlog.... i'll continue watching and leaning on you vlogs....

Thank you so much! I really learned a great deal!!!👍🏼😎👍🏼

50:20 i was so happy watching this moment your way of explaining things is amaizng

Thanks very good and nice video I learnt so much from you.

I did learn a lot from this video, thank you.

id love to see you fix some rx 570s an 580s i have a bunch i could send u man, i need fixed, but to see u do it would help me fix mine i love how u go over everything an explain it, SO AWESOME MAN i love you!!

Really enjoyed this video. Thank you.

I watch your videos like i watched The Shawshank Redemption or other great movies :))Imagine in high school i was the electronic class and none of those teacher talked like that and was so boring.Now...i watch with big curiosity, you explanation are so good and i understand no matter if my english is bad. :)) GOOD JOB!

Man you are the teacher I never had🤗

Brilliant info - really useful and educational... many thanks for taking the time to share.. Subscribed ! :-)

Very good try. I really enjoyed this video. Thank you.

I like your videos very much. Your speach is 98% understandable for a non native, non supreme speaker :) You can teach me electronics - in English! - That is way more rare than you may think...

Very nice video. I learned a lot I found an ATI RX series card in my closet going to try and fix the short with my new machine.

I dont have a desk top pc. Mostly laptops I own.. but as a electrical technician.. this Is informative and interesting to watch

Thanks for another great and very interesting video ! ;)

I DONT USUALLY STAY FOR THE LONG VID....but i was fascinated so I finished the video

Terrifc video learned a lot . I am playing around with some ebay failures , Looking into reflow if no obvious failures.

Interesting look into buck regulators. The only thing you didn't try was swapping out the driver i.c. I think that was faulty (thermally unstable) and provided the path to ground for the high side f.e.t. The driver i.c. probably switched the f.e.t. on for too long, killing it.

Thanks for posting this video - I learned a lot :)

Good work, respect chap

Boy, (i'm 63) you have done a good work. It will be that you not have fixed the phase, but for sure you have teached something of english to me!

So very interesting video. Very educational.. i injoy watching.

Fantastic video!!!

Thnx for sharing knowledge... u are great man

On top of the great content in your channel, I love your English! 👍👍

Wow, this came full circle! Good info though!

Thank you for the amazing explanation

Very interesting video! More please !

Graham bro, you are really awesome.....

Love the videos very educational

In my experience (not specifically related to graphics cards), if your MOSFETs short, you should assume the drivers have been damaged and replace them as well.

Been at NorthridgeFix , felt guilty so checking in. 😂😍

SUBSCRIBED! Keep up the good work and Thank you for this information! :)

I love the cheap compact testers/o-scopes. However in this case I'd love to see a decent analog scope, at least in an educational video. Just constructive criticism. Nicely done though.

awesome video! ive got an rx480 im trying to fix and this is super helpful.

Killer video, good info

Still, a great vid. I had no luck trying to replace a broken off 3.0 USB header pin on an older ASUS mobo, by desoldering/soldering (plan was to us a leg from a LED) but still felt satisfied with my effort in trying.

Great demonstration of how buck regulators work in real life. 👍👍👍 After theoretical explanation in a couple of previous videos it's nice to actually see it "in action". 😊😉 Thx for the effort.

Nice work mr. !

Great vid!

great content. thanks!

"the short magically disappeard" :D There's no magic, the problem lays in the method you use to solder the mosfets (or actually any QFN-type components with thermal pads), placing to much solder on pads and then trying to push it out is a bad idea, 'cause you push it in all 4 directions, 3 visible and also the one that goes to G and S pads of the mosfets which you can't see but for sure will make a short circuit ;) So in my opinion it's better to clean the pads from old solder and use solder paste (even some cheap chineese one), SnPb is preffered (by me) 'cause of lower melting temperature :) @1:09:40 you start thinking why it shorted again and burn upper mosfet while it has no connection to GND, it's all caused by failed PWM controller and/or driver which drives low side mosfets constantly so at output you have GND all the time and when swiching upper one it simply burns out ( double lower side mosfets can handle that short, single upper one will blow up)

Amazing video keep it up

Another great informative video, please Sir keep them coming but also please don't endanger the lives of yourself or your staff

Great video.

How can you be so cool?! Thanks Sir!!

I find it funny that right after I left the video and commented you need to read schematics, you start looking at schematics. Albeit not the card manufacturer schematics. I wonder why? Also critical because the phase ground didn't end there, couldn't you have traced it farther? I do understand though you showed how you can figure out without schematics what goes where, which is handy if it is obscure or old, but that card wasn't either. Can't you get small business loans to cover ultrasonic cleaners and Schematics websites? I can't find them for free but idk. Thanks, this was awesome! I learned a ton. Entertaining as well.

man youre amazing i love you

I have a GTX 970 looks like liquid damage , short out PC . Happy to post it for a attempted diagnostic video

you have exactly the same multimeter as me xD Man, I'd love to work in a repair shop with you, haha

Forget your Kyles, Jayzs and Linusus.... This real IT problem solving! I wouldnt attempt it myself though... My clumsy fat fingers wouldnt be able to be this precise

Good video 🔥💥💥

Superb!!!!!

3rd LFC video and i learned a lot already.. subbed! Why this youtube only recommend your video just now?

Question is.. have you tested the coils which the mosfets are working together with? If they all have the same characteristics to different frequencies, or if other components have measured values slightly off specs. It's a longshot, but it might be the cause of why it's the first mosfet that shorts, if the harmonics might be off tune causing standing waves, or if some other component interferes. I was thinking, maybe you could trick it into running 2 phases instead of one at lower and moderate load to smoothen the transition to 3 (or 4) phases? I really enjoy your videos and your waffling :)

cleaning with isopropyl alcohol will help a lot and I believe that part that you did not know what it did is some kind of a boos or buck converter for voltage depending on the configuration.

I'm a retired electronic tech from the USAF and I've seen a capacitor test good but then go short. Replacing the capacitor corrected the issue of a system blowing a fuse. I'd say replace the Q1 cap even if it tests good.

Hi I am loving your videos on repairs keep them coming. How ever it is not really a VRM, that term was used when the voltage regulator was on a small pluggable module, hence Voltage Regulator Module. I am guessing the the topside FET is not switching properly maybe the bootstrap capacitor or driver IC is not working properly. The input inductors are only for EMI reduction, if they were not fitted and it went short all that would happen is the PSU would go into chirp mode assuming you do not have any other components in the board that would fail 1st. I believe the weird chirping you saw on the scope was a sign it was not switching correctly, and the waveform on the output of the FET will be a pulsed one from GND the 12V, I am assuming your pocket scope cannot display the correct waveform.

Sir, it's 3:48am in the morning... WTHECK just happened.. all I heard was turbo dead.. Mosfett just dropped dead!! 😂R.I.Pieces Mr. Mosfet. Sorry sir, I was quite happy for your accomplishment. Use the donor card.. what else can work as an inductor replacement? Dr. Frankenstein we need an Abby Normal Brain.. A better Mosfet that can handle a fuller load. This way the resistors can still take care of some of the flow.

Lovely bro

It's hard to imagine it's worth your time to attempt to repair a 960 board. I don't know about the U.K. but a board like this is worth about $150 functioning, it seems like too much time and effort for not enough potential reward. Anyway, I really enjoy your videos, keep them coming!

Thank you

How have I only just found your channel?!...I'm just waiting for my graphics to come out of the oven.

well made video

aewsome dude, keep it raining...

Videocard resurections.. Nice man

at the start of page 13 of the datasheet at 21:57 sec, it's clearly written "if a phase is unused, the differential inputs to that phase's current sense amplifier must be shorted together and connected to the output"

I know this video is getting on a bit now but I just stumbled across it, and I couldn't help but notice that the electrolytic cap by the auxiliary power connector seems to have the polarity the other way round, just a thought...

Man, i am not an expert, i do repair things from time to time, but your voice and especially your English accent, really make me watch your clips. I have an issue with a keyboard: a column of keys get lights but don't send a signal, the keyboard is Logitech G pro. I try to bridge but it seems all keys ( F7, 5, T, G, V and Space) are one link on the board. Do you have any idea on how to start this repair, whats spares should I look for. This issue appeared after I try to resolder a switch ( I ve done this before, many times but never saw this type troubleshooting ). Thank you so much and Rock on!

Awesome! It's such fun going along for the ride. I don't understand everything but it's fascinating to learn :) Sorry about your "quiet night". Oh does it matter that the first coil is crooked?

i got a gtx970 that set on fire, i had it water-cooled but the pump died. there are a couple of scorch marks on the water block it looks like a couple of tiny diodes. i might have to give this a go at some point.

Did you put a fuse on the input supply, instead of the inductors (is it a potential bomb for your buddy)? Something like 10 - 12A perhaps. Enjoyed the video, cheers.