Hey I know the is an older video but hoping you might have some insight. I have a Sapphire RX6800XT that is missing the vCore. I don't seem to be getting the GFX_SOC_PWRGD out of pin 18 of the XDPE132G5D controller chip. Which means that the AND gate U506 is not outputting anything to pin47 of the PWM chip. VCC and the 1.8V_EN voltages going into the PWM controller are there. Would this suggest the PWM controller is bad?
I'd have to take a look at the specific circuit, but no EN (which comes from PGOOD of the chip for the previous power rail) usually means one of three things (there are a few more depending on the circuit but this is where I'd start): - The pullup resistor that's supposed to power that circuit is bad - You're missing the power that's supposed to power the circuit through the pullup resistor (3v3_aux or a similar secondary 1.8v/3.3v rail) - PGOOD is actually being pulled down by the controller or chip of the previous power rail. This means the voltage is technically there, but it's going straight to ground through the controller/chip PGOOD is usually what's called an open drain output, which means that it doesn't actually output any voltage (the pullup resistor is what supplies voltage for the circuit), it can only pull it down to gnd, or release it. If you have 0 or near 0 ohms on that circuit (at EN of the rail with no voltage, assuming you're checking the next rail in the sequence. Cards have an order of which their power rails turn on) with the card powered on, then either the controller/chip of the previous rail is fried, or the chip is detecting that something isn't right so it's pulling that PGOOD circuit to ground instead of releasing it. Usually the latter. This is where it can get a bit tricky, if you're lucky it's going to be an obviously blown chip or resistor. If there's no visual damage, you have to find the datasheet for the chip online, and go through various pins to make sure that everything is good. If you have power output from the chip and it's the correct voltage, then it's typically going to be something to do with the feedback or current monitoring circuitry. E.g. the chip thinks it's getting 3v back when it should only be seeing 700mV, or it's seeing nothing back when it should be getting .9v (these are arbitrary values by the way). It could be another number of things, but that's up to you to figure out! Everyone thinks that graphics card repair is difficult because of the soldering, BGA work, etc. While this can be true, the people who are good at graphics card repair had to learn to read circuitry and figure out how circuits are supposed to work (or that they're not working right), in order to fix problems that aren't obvious. And as I always tell people, don't just go swapping parts. Learn how to diagnose a circuit or chip instead, and you'll be much more efficient in the future. Not to mention you won't waste time soldering when that may not be the issue. Swapping or removing things should only be a last resort. Good luck :)
Great, detailed video. I never understood how cards can get so wrecked. I have all sorts of cards in quality static bags loosely togethor that are decades old. All work
Thank you! Mostly cards with back plates being tossed around with other electronics or cards without back plates, when nothing has protection. Either that or just someone being careless and scraping it against something, etc.
Have been delving into learning board level repair myself recently and I think many others can agree that quality videos like this are sparce. Keep up the wonderful work. The structure and educational points are done well. I have a 1060 I could send you if you'd like to attempt to repair it. It's also missing vCore, but doesn't have any missing components like this one
I've got a few more 1060s and P106-100s (basically 1060s) to repair, and I'm hoping one of them is a different EN circuit problem that I can make a video on. If not, I'll hopefully come across another 10 series that's got an EN problem, since that circuit is basically the same across all 10 series. I don't take customer repairs at the moment, but maybe one day! Thank you for the offer though, and the compliment on the videos :)
@@WasatchElectronics Well actually was thinking of just sending it to you to fix and do as you please with, I was not looking to get it back. I fully understand though and definitely keep up the great work. Hopefully one day I'll be able to know enough to make videos to help others
@@4TMGames I'll consider it! At the moment I haven't got a PO box or anything set up, and I'm not very interested in just handing out my address haha. If that changes soon I'll let you know, I'd be happy to take a look and maybe do a video on it :)
Thanks for going through all the steps. I am trying to learn repair and most channels I believe know the problem and go straight to it. I need to know the steps to find the problem! Thanks again for the video.
No problem! I thought the same when I started. I'm trying to get a good mix of not dragging things out too much, but also not skipping any necessary steps. Glad you liked it
I'm so stoked you created this channel, you have a wealth of GPU knowledge! I have already liked and subscribed and will be eagerly awaiting more videos!
Crystal clear how you explain what you think and why you decide to do something. I would like to watch more videos explaining why you expect to find diferent components on diferent rails. Maybe a series os videos going over all main components of a working gpu explaining what they do? I havent seen that before
Thank you very much! Yeah that's a great idea. I want to sit down and do a bunch of basics on graphics cards, and a video like that would fit in perfectly.
Thanks! I've been active in the community for about a year now, at least as far as GPU repair goes, but am only just getting around to doing some videos :)
the best explanation i've ever seen so far, valuable content even with an instable microscope camera and a bad resolution "an insane skill for tracing without schematics". PS : could you pls explain more about dual NPN/PNP transistors, and gates and diodes. thank u for sharing liked and subscribed
Thank you! Trust me, the shaky microscope kills me as well. I'm working on a better solution for mounting, which I think will solve my issue. Sure, I plan on doing a video on those soon enough that will go into more detail on how they work!
Hey, great video! I've got a question that I'm hoping you can help with. My son was replacing the thermal paste on an RTX2060 mobile and knocked off possibly a resistor, and lost it. Any chance if I send you an image of the board you might know what piece is missing from that spot. We didn't have any luck with Nvidia or MSI. Thank you!!! Steve
Thank you! Sure, I can definitely help. It would probably be easier if you join this Discord discord.gg/GZR7DK5g and ask about it there. I'm sure that myself or someone else can look for a schematic that matches or is close enough, and help you figure out the component and the value!
Sir, I experienced the same thing as what was explained in the video, the GPU is ZOTAC GTX 1060 6gb AMP edition, the component layout is exactly the same as what you explained and the problem is the same, only on the GPU that I am working on there are no missing components, so I want to ask how much voltage is in the components that you replaced, especially in the transistor pins, thank you in advance.
hi i need an advice,i keep getting malfunction error in hiveos,card heats uo,but wont just fully load on hiveos,on windows it crashes on startup nvlddmkm.sys error ,
To figure that out, you'd want to check the datasheet for both. Compare pinouts and specs to see if it's replaceable. I'm not an expert and don't have an EE degree, sometimes I just guess based off of the datasheets and the knowledge I do have. I make sure to check everything properly when doing so though - Check signal output with oscilloscope, check with thermal imaging to make sure it's not heating up more than the other mosfets, etc. The ratings are mostly what you're after though, I always make sure it's got equal or higher max ratings for amperage and voltage
@@WasatchElectronics thanks for the advice! That transistor is used for Pull-down transistor for EN signal on 1,8V IC. And both MMDT and MBT tiltled as multipurpose signal transistor, and have some pinout diagram. I replace it anyway, and it work like what it used to be.... Cheers
Thank you! Yeah, that's just due to the fact that I'm using a webcam to record at the moment. I did some post processing, but even then it can only get so good. I'm on the hunt for something better at the moment, should be only a short bit and the quality will greatly improve! I'm also trying to figure out the shaking, I'm not sure what causes that on my scope. It's attached to two desks and seems to be very solid, so I'm thinking maybe it's my desk moving slightly. I'm looking into attaching it to the wall to solve that. Thanks for the feedback :)
Hey I know the is an older video but hoping you might have some insight. I have a Sapphire RX6800XT that is missing the vCore. I don't seem to be getting the GFX_SOC_PWRGD out of pin 18 of the XDPE132G5D controller chip. Which means that the AND gate U506 is not outputting anything to pin47 of the PWM chip. VCC and the 1.8V_EN voltages going into the PWM controller are there. Would this suggest the PWM controller is bad?
I'd have to take a look at the specific circuit, but no EN (which comes from PGOOD of the chip for the previous power rail) usually means one of three things (there are a few more depending on the circuit but this is where I'd start):
- The pullup resistor that's supposed to power that circuit is bad
- You're missing the power that's supposed to power the circuit through the pullup resistor (3v3_aux or a similar secondary 1.8v/3.3v rail)
- PGOOD is actually being pulled down by the controller or chip of the previous power rail. This means the voltage is technically there, but it's going straight to ground through the controller/chip
PGOOD is usually what's called an open drain output, which means that it doesn't actually output any voltage (the pullup resistor is what supplies voltage for the circuit), it can only pull it down to gnd, or release it. If you have 0 or near 0 ohms on that circuit (at EN of the rail with no voltage, assuming you're checking the next rail in the sequence. Cards have an order of which their power rails turn on) with the card powered on, then either the controller/chip of the previous rail is fried, or the chip is detecting that something isn't right so it's pulling that PGOOD circuit to ground instead of releasing it. Usually the latter.
This is where it can get a bit tricky, if you're lucky it's going to be an obviously blown chip or resistor. If there's no visual damage, you have to find the datasheet for the chip online, and go through various pins to make sure that everything is good. If you have power output from the chip and it's the correct voltage, then it's typically going to be something to do with the feedback or current monitoring circuitry. E.g. the chip thinks it's getting 3v back when it should only be seeing 700mV, or it's seeing nothing back when it should be getting .9v (these are arbitrary values by the way). It could be another number of things, but that's up to you to figure out!
Everyone thinks that graphics card repair is difficult because of the soldering, BGA work, etc. While this can be true, the people who are good at graphics card repair had to learn to read circuitry and figure out how circuits are supposed to work (or that they're not working right), in order to fix problems that aren't obvious. And as I always tell people, don't just go swapping parts. Learn how to diagnose a circuit or chip instead, and you'll be much more efficient in the future. Not to mention you won't waste time soldering when that may not be the issue. Swapping or removing things should only be a last resort.
Good luck :)
Great, detailed video. I never understood how cards can get so wrecked. I have all sorts of cards in quality static bags loosely togethor that are decades old. All work
Thank you! Mostly cards with back plates being tossed around with other electronics or cards without back plates, when nothing has protection. Either that or just someone being careless and scraping it against something, etc.
Insta-subbed! Another amazing resource, glad you made this channel too!
Thank you, I'm glad people are enjoying what I'm posting!
Have been delving into learning board level repair myself recently and I think many others can agree that quality videos like this are sparce. Keep up the wonderful work. The structure and educational points are done well. I have a 1060 I could send you if you'd like to attempt to repair it. It's also missing vCore, but doesn't have any missing components like this one
I've got a few more 1060s and P106-100s (basically 1060s) to repair, and I'm hoping one of them is a different EN circuit problem that I can make a video on. If not, I'll hopefully come across another 10 series that's got an EN problem, since that circuit is basically the same across all 10 series.
I don't take customer repairs at the moment, but maybe one day! Thank you for the offer though, and the compliment on the videos :)
@@WasatchElectronics Well actually was thinking of just sending it to you to fix and do as you please with, I was not looking to get it back. I fully understand though and definitely keep up the great work. Hopefully one day I'll be able to know enough to make videos to help others
@@4TMGames I'll consider it! At the moment I haven't got a PO box or anything set up, and I'm not very interested in just handing out my address haha. If that changes soon I'll let you know, I'd be happy to take a look and maybe do a video on it :)
Channel was recommended to me by Tech Cemetery. Amazing detective work right there. Instant sub
Thanks for going through all the steps. I am trying to learn repair and most channels I believe know the problem and go straight to it. I need to know the steps to find the problem! Thanks again for the video.
No problem! I thought the same when I started. I'm trying to get a good mix of not dragging things out too much, but also not skipping any necessary steps. Glad you liked it
Great video! Really appreciate the thorough explanation of your troubleshooting process
Thank you! That was the goal, I'm glad to see that it's being received well
I'm so stoked you created this channel, you have a wealth of GPU knowledge! I have already liked and subscribed and will be eagerly awaiting more videos!
Hey, thanks Aaron! There's definitely a lot I don't know, but I'm getting there :) Hopefully I'll have another video out in the next few days!
I feel like I'm hearing your parents talk every time you say "that's plenty good" :)
Crystal clear how you explain what you think and why you decide to do something. I would like to watch more videos explaining why you expect to find diferent components on diferent rails. Maybe a series os videos going over all main components of a working gpu explaining what they do? I havent seen that before
Thank you very much! Yeah that's a great idea. I want to sit down and do a bunch of basics on graphics cards, and a video like that would fit in perfectly.
Nice job. Keep it up and wellcome to the repair group 👌
Thanks! I've been active in the community for about a year now, at least as far as GPU repair goes, but am only just getting around to doing some videos :)
the best explanation i've ever seen so far, valuable content even with an instable microscope camera and a bad resolution "an insane skill for tracing without schematics".
PS : could you pls explain more about dual NPN/PNP transistors, and gates and diodes.
thank u for sharing liked and subscribed
Thank you! Trust me, the shaky microscope kills me as well. I'm working on a better solution for mounting, which I think will solve my issue.
Sure, I plan on doing a video on those soon enough that will go into more detail on how they work!
subscribed... good explanation catmeow.. hehe
Very nice craft
Nicely explained. Love it
Thank you!
Hey, great video!
I've got a question that I'm hoping you can help with. My son was replacing the thermal paste on an RTX2060 mobile and knocked off possibly a resistor, and lost it. Any chance if I send you an image of the board you might know what piece is missing from that spot. We didn't have any luck with Nvidia or MSI.
Thank you!!!
Steve
Thank you! Sure, I can definitely help. It would probably be easier if you join this Discord discord.gg/GZR7DK5g and ask about it there. I'm sure that myself or someone else can look for a schematic that matches or is close enough, and help you figure out the component and the value!
@@WasatchElectronics Thank you very much! I'll forward the info to my son and let him post it on Discord. Thanks again!
Sir, I experienced the same thing as what was explained in the video, the GPU is ZOTAC GTX 1060 6gb AMP edition, the component layout is exactly the same as what you explained and the problem is the same, only on the GPU that I am working on there are no missing components, so I want to ask how much voltage is in the components that you replaced, especially in the transistor pins, thank you in advance.
I am waiting for new video, thanks for sharing 👍
I posted one last night, in case you didn't see it. I've also got another I just recorded yesterday, that should be going up in a day or two here!
@@WasatchElectronics yea i watched 2 of your videos, waiting for new ones 😊
hi i need an advice,i keep getting malfunction error in hiveos,card heats uo,but wont just fully load on hiveos,on windows it crashes on startup nvlddmkm.sys error ,
Can i replace K6N (MMDT3904) with MBT3904DW1? Both are Sot-363 dual multi purpose npn signal transistor...
To figure that out, you'd want to check the datasheet for both. Compare pinouts and specs to see if it's replaceable. I'm not an expert and don't have an EE degree, sometimes I just guess based off of the datasheets and the knowledge I do have. I make sure to check everything properly when doing so though - Check signal output with oscilloscope, check with thermal imaging to make sure it's not heating up more than the other mosfets, etc. The ratings are mostly what you're after though, I always make sure it's got equal or higher max ratings for amperage and voltage
@@WasatchElectronics thanks for the advice!
That transistor is used for Pull-down transistor for EN signal on 1,8V IC. And both MMDT and MBT tiltled as multipurpose signal transistor, and have some pinout diagram.
I replace it anyway, and it work like what it used to be....
Cheers
@@farizfadillah7557 good information, thank you
If you can make the video sharper that would be great.
Video shakes a little when you are moving mount.
Overall very nice for a first video homie.
Thank you!
Yeah, that's just due to the fact that I'm using a webcam to record at the moment. I did some post processing, but even then it can only get so good. I'm on the hunt for something better at the moment, should be only a short bit and the quality will greatly improve!
I'm also trying to figure out the shaking, I'm not sure what causes that on my scope. It's attached to two desks and seems to be very solid, so I'm thinking maybe it's my desk moving slightly. I'm looking into attaching it to the wall to solve that.
Thanks for the feedback :)
I come here from reddit)
The part I never understood was why the mining cards don't have fans
they have, display ports they dont have
thank you