GPU REPAIR Tricks,Tips & Techniques. All you to know about PCI-e Lanes Socket Interface to fix stuff

[@LearnElectronicsRepair]

NOTE: 1/ I re-uploaded this video as the original upload had a couple of errors that may confuse people. The original was only public for less than 5 minutes last night, before I moved it to 'Unlisted' but I notice some of you had the URL and were able to watch it and comment, 100% positive as it turned out 🙂 Maybe I was just being too particular but I re-edited it to fix the errors. if you commented on the 'unnoficial' version I'm sorry those comments were lost. NOTE: 2/ This GPU was the topic of a poll to see if we could remove reball and replace the GPU using a variety of equipment. The poll is still active and I'm still going to attempt the reball - this is actually more interesting now because we can see if the card is working both before and after reballing it, NOTE: 3/ Yes, I know the diagramatic description of an LVDS signal isn't quite accurate, but it is a good analogy for people to understand the principle. In actual fact the inverted and no inverted signals overlap each other, so a logic zero is represented by one wire being higher voltage than the other, and a logic one by the polarity of the two wires reversing NOTE: 4 / Sorry about the slight feeling of deja vu at 45:10 LOL

[@ignacioortiz1445]

Man this videos are really excellent, thanks so much for sharing all this information. Blessings from argentina

[@VGATEC]

Congratulations on passing on your knowledge in such a spectacular way! From Brazil here!

[@LearnElectronicsRepair]

Thank you, you're welcome 🙂

[@opacky1411]

This channel is really getting priceless source of knowledge! Great job m8! 👍

[@LearnElectronicsRepair]

Much appreciated!

[@nathan5315]

Dad's army! Love it.

[@sureshlingabathina]

This what I am looking for, fortunately I found on your channel, subscribed.

[@bobpitt1261]

Excellent video Richard, thanks.

[@nevadamarschke8052]

This is the best video I have found o this topic, thank you!

[@JosepsGSX]

Thanks for taking the time both for the first version and then thise second improved one. I wouldn´t bother at all detecting (or not!) any kind of typos but I understand you keeping the lessons tidy. The ysure will gain value over time when the viewerbase grows, which for sure is a well deserved outcome.

[@1967KID]

Thank you m8 i really enjoy the information and the respect that you always show us new technology, respect from Puerto Rico.

[@tonycstech]

Pcie reset pin on the back checked in diode mode using positive to ground. Ref clock same thing, but with negative to ground. Voltage drop must be same for ref clock. Same with data lines. Diode mode, same voltage drop across all pairs.

[@Qcorner1]

Thanks for that Richard! Great stuff. I appreciate the detailed walk through of this GPU repair…I learned a lot. Cheers Darrell-🇨🇦

[@canaldrive_r]

Thank you very much for the excellent class. 👍

[@markvandesande8855]

Great explanation of pci workings thanks 😊

[@LearnElectronicsRepair]

Glad you liked it

[@mcc5651]

Bet gpu tutorial i followed. Thanks please keep it coming with these series very nice!

[@NewbFixer]

As ever Rich, Outstanding Mate.

[@LearnElectronicsRepair]

Cheers!

[@Dutch_off_grid_homesteading]

Heya, lol editing is not that easy as you want the true to being seen about the trouble shooting that you do into dept and detail I love it

[@paulb4uk]

Great video only one other guy on youtube i see repairing and explaining gpu repairs so these video,s are very useful/

[@tomglenn485]

u r a seriously good bloke

[@dougiee6589]

This is a very good video from you for us beginners with no knowledge on how gpu works

[@kazim.karabacak]

Thanks Richard, great explanation ♥

[@badboydas]

Another great video keep them coming, I'm learning a lot.

[@gregstanley2728]

Very informative video Richard. Unfortunatelly my gpu Has shorted refclk signal which indicates dead gpu😢

[@mesterak]

This is a great series, but I need to fix some AGP cards. What are your recommendations on what to check for connector pins on AGP cards?

[@zeferrum]

An idea for a future videos would be to show and explain the functionality of the various generations of vcore power supplies mosfet drmos of multiple chips versus single chip high low side drain gate. For example gtx 700 vs gtx 1000 changed in that respect but maybe before there was even previous changes.

[@LearnElectronicsRepair]

OK I will look into that, thanks

[@joseluisRueda]

Mis felicitaciones , sus videos son muy interesantes 🙂 mil gracias por compartir sus conocimientos

[@Simon-mz7sf]

Hi Richard and thanks for such an informative video. Congrats on attaining 10k subs subscribers. My apologies if you did cover this. Why the series capacitors in the bus signal path. I would have thought they would harm the wave shape by acting as a HPF. Hoping you might be able to explain. Thanks Simon

[@LearnElectronicsRepair]

I think it is to create DC isolation between the host and device, those LVDS receivers are very sensitive but also very easy to damage. As I posted in the pinned comment my explanation of LVDS was somewhat simplified to make it easy to understand, and to draw with pen and paper. In reality the inverted and no inverted waveforms are superimposed on each other so a 0 is represented by one wire being positive with reference to the other, and a logic zero is represented in the same way but the polarities are reversed. At the frequency that LVDS operates on a PCIe lane, the capacitors add practically no resistance to the AC signal.

[@VavrMar]

I'm about to attempt to bring into life RX 6700 XT which has broken PCIe header. From your explanation I understand that theoretically to prove GK works at all and is not damaged somewhere else only RST signal is needed? Or do I need to also connect all 12V and 3,3V? I understand that all JTAG and SMB are not necessary to be connected. Do you know if vBIOS flashing is using JTAG and SMB? Thanks a lot. Video is really great even though as non native I sometimes had and trouble to understand the accent.

[@mosfettg6857]

Thank you, interesting and informative

[@marciocorbolan]

For replacement, this configuration would be correct: 220nF 10VDC X7R 20% 0402 Ex: KEMET - C0402C224M8RACTU / TAIYO YUDEN - MAASL105SB7224MFCA01 / MURATA - GRM155R71A224KE01D

[@jesusyrose2560]

Great videos teacher

[@therealspixycat]

Can you also explain the power sequence on a typical laptop motherboard? My guess that that sequence is the same on a desktop mb

[@Sydney268]

Nice one, great video :)

[@LearnElectronicsRepair]

Thank you very much!

[@parkeryoung2471]

I have a damaged pcie connector like heavily damaged can it be somehow cut and replaced or fixed somehow

[@ttpechon2535]

Should there be capacitors above the pcie connector on EVERY graphics card? Cause on one side of my gt 730, its missing half of them, but the pads don't look like they've been knocked or ripped off though.

[@buug76]

Actually a gpu uses only few of those datalines, maybe the manufacturer of your card didn't populate the caps on the unused datalines to reduce the costs.

[@leekimdo6699]

Hi Richard!, can you make a video about ddram of man pc have all power, all signal, reset , reprogram bios but speaker alway beep beep

[@LearnElectronicsRepair]

HI is this mistyped or mistranslated?' ddram of man pc ' I'm not quite sure what you mean.

[@leekimdo6699]

@@LearnElectronicsRepair "ram of main pc" this is a mistyped

[@zeferrum]

Richard an you check something about a signal apparently reversed? On the two risers I bought from Amazon REFCLK- REFCLK+ are reversed between the riser and the insert. Is it the same for yours? I cannot seem to track down why this would be if all are like this.

[@LearnElectronicsRepair]

Yeah mine is also reversed on REFCLK+/- as I mentioned in this video actually. Or at least I think I did, but I had to re-edit it to save a couple of confusions. I also have no idea if they are all like this, but if yours also is then that is definitely two of them that are.

[@zeferrum]

@@LearnElectronicsRepair A S repair states his riser is not connected in reverse in a reply to a comment question. I wonder if this is why the RTX 3080 did not work in x1 in the other video. For reference His answer is in here in the comments. kzbin.info/www/bejne/iqmqda2Im76Yi5o

[@zeferrum]

On the other hand and supporting your comments, There are multiple mentions of "refclk polarity" (that is the google term to search) being reversed, so this appears to be fine by PCIe standards. Now whether NVIDIA supports this in the RTX 3080, I suspect we would have heard. Looking at the PCI finger this appears to have been done for trace routing purposes. www.reddit.com/r/AskElectronics/comments/n1sz69/why_is_the_pcie_clock_pair_inverted_here/

[@nocrass]

Hello , i have a dead rx580 but no motherboard yet, just a lab psu. Can you confirm this item showed in the video (the GPU PCIE adapter is mandatory to trace the fault on the gpu ? Cheers.

[@LearnElectronicsRepair]

No it is not mandatory at all, but it does make it much easier to measure voltages on the graphics card when it is running, and they are cheap to buy - look for 'mining adapter'

[@Richiesz]

Thank you!

[@biscachon18]

Hi Richard, could you share that pci-slot-big.gif file?

[@iFixConsoles]

Hi Richard there's a comment on this video with a link to another channel buddy, as much as hopefully folk are smart enough not to click the link you may want to remove it and ban the user 😁. I was lucky enough to watch this vid on the 1st upload but going to leave this 1 running too for the youtube count 🥰

[@LearnElectronicsRepair]

Thank you. If there is a comment linking to another channel then I can't see it - YT must have removed it. Actually I take that as a sign of impending success LOL. Usually little channels try to put there links on bigger channels comments. Of course I never had to do anything like that, as just from my user name. every time I comment elsewhere it is obvious I have a channel and what my channel is about. I see you had a similar idea 😀😆😁😉

[@iFixConsoles]

@@LearnElectronicsRepair I did report it mate so may have been removed after the report went in 🙂, and yes I agree they usually come out of the wood work as channels grow.

[@miosz8531]

Hi :) I have problem with my GPU, it gives picture only when i plug it in riser pci X16 to X1. In X16 slot on motherboard it's not running, i tried it on few motherboards. What do you think about it?

[@LearnElectronicsRepair]

Follow every step on this video and you should hopefully be able to find out what is causing the problem Check all the signals as I show, Check all the resistances as I show Check all of the PICe lane capacitors with a capacitance meter as one may be cracked and open circuit but physically look OK

[@miosz8531]

@@LearnElectronicsRepair i checked all that you, and all looks good

[@miosz8531]

@@LearnElectronicsRepair Ok, I noticed that this GPU works only on 775 motherboard. On 1155 and 1150 not. Do you have any idea?

[@bobg3034]

Hi! Thanks!

[@KyzuLuvsNeka]

Impressive as allways! Just one question... any tip on soldering these little b*stards... Got a similar problem and they're so tiny that i can't get enough heat to solder just one (with pointy tip ts100 solder), they are like in pairs and when i get one in place the other ones moves...

[@LearnElectronicsRepair]

To get enough heat in to the job, you need to use flux and a chunky tip - I use a KSGER T12 with a BC3 tip set to 330C. This may seem counter-intuitive but get the chunkiest tip you can find and give it a go

[@KyzuLuvsNeka]

@@LearnElectronicsRepair thanks! The ones that i have are big enough to heat but too big to just "touch" one of the capacitorsm allways end up moving two of em. I'll try with that tip and temp. Thanks again!

[@LearnElectronicsRepair]

@@KyzuLuvsNeka I have shown how I do this sort of work on various videos but I could also make a specific one on this topic 😉

[@KyzuLuvsNeka]

@@LearnElectronicsRepair I'll recheck em first. Thanks for your work as allways, love the way you work and you logic thinking. If i miss something i will ask if you don't mind jeje

[@LearnElectronicsRepair]

@@KyzuLuvsNeka Ask away.... no problem 🙂

[@NotThatGuyJD]

What is the package size of these capacitors?

[@LearnElectronicsRepair]

They are 0402

[@NotThatGuyJD]

@@LearnElectronicsRepair thanks so much.

[@anonimdark6106]

Nyimak guru

[@mahagarskakurva]

WHY TF THIS VIDEO HAS ONLY 2K VIEWS?

[@LearnElectronicsRepair]

Yeah that kinda happens on my channel, but the subscriber base is increasing quite nicely now 🙂 This video is only 12 hours since publishing - I do have some that are hitting 50k views after a couple of weeks. YT is a marathon not a sprint, I have found,

[@lun4rkid]

Consider adding time stamps

[@troymcfee960]

👍

[@broken1965]

Why can't GPU'S be designed like motherboards with mechanical sockets gpu,mem considering the cost for high-end hardware i understand the failure % probably is why and planned obsolescence

[@Venom0007]

Hello sir , if i may ask you another question . I currently have the solderingstation "Aoyue int 866" but its less watt then you recommended . Will this do ? Or otherwise i was planning on getting the "ST2090D" it has 80 watt, or if u have suggestions on what to look out for . THe T12 was currently not available here were i live ,so looking out for similar options . Kind regards ,Guy

[@LearnElectronicsRepair]

What makes the T12 so good is not the Watts (lol) it is the fact that the heater is integrated into the tip. The ST2090D looks like the old technology with a tip that slides over the heating element. This is inefficient at transferring heat into the tip and that makes all the difference. Really if you are buying a soldering station these days you need to by one with integrated heaters in the tips. The T12 is probably the best known of these but there are others. T12 is a tip type by the way, not a brand of soldering iron. Mine is KSGER branded but AliExpress lists many other options. I thought they delivered to everywhere, even little dots of islands in the Atlantic Ocean like where I live. www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20220314102809&SearchText=T12+Soldering+Iron