Hi. I have a similar problem with this AND gate not outputting 5V, but it is because there is no 2.4v on pin 2 of the AND gate. Anyone know where this 2.4v should come from? Thanks
There is an AND gate with the marking U29. It's on the right front side of the board near the memory Inductor. Check on pin 4 if you got any voltage. There should be voltage on pin 1, 2 and 5. Something may be missing there. Start there. It could also be that that AND gate is faulty.
Thanks bro! Your tip helped me a lot! Can I ask you what cards have this type of AND gate and is it possible for some other cards to have this kind of problem? thanks a lot.
All cards have AND gate. The one used on this card can also be found on the 2060, 2070 and 2080 cards. Apart from that the 3060 and 3060ti. 3070 is the one which dies commonly with this problem. Not observed other cards die like this.
@@GraphicsCardRepairs-tk7ql thank you for your response! I've found one on a 2080ti and while testing it, I think I accidentally caused a short circuit on the 12v line (second 8 pin connector) 😭
I have a update on my fix with the same card bro! So I found the shorted DrMosfet by removing all 4 inductors and I found the culprit and removed it. I've replaced the AND Gate that has problems but the GPU refused to be detected. At this point I decided to remove the replaced AND gate and started the GPU with mesuring the pads where the AND gate supposed to deliver 3.3V, 2.4V, 5V and 1.5V and to my biggest surprise all those voltages are present without the AND gate on the card!!! I booted the card, installed the drivers and I was surprised it worked fine! How is that possible bro? Can I leave it like this or should I definitely replace this AND gate? The card worked even without the Mosfet replaced (I couldn't find one at the moment).
Looks like the 5v from the input is shorted to 5v output. That can explain why you have 5v on the output pin which triggers the DRMOS to activate. There is no other explanation. The AND on pin 4 is output that triggers 5v to DRMOS and pin 5 where it should have 5V input. Somehow 5v is going straight to pin 4 which should not happen without the AND gate. So currently it is bypassing the logic and activating the rest of the circuit. Now there should not be any 1.5v on any pin 1 should be 2.4v pin 2 should be 3.3v pin 3 is ground pin 4 is output and pin 5 is 5v input which gets transferred to pin 4 when voltage is present in pin 2 and 3. So on which pin do you get 1.5v? If pin 5 then there is something wrong with a resistor on the line.
@@GraphicsCardRepairs-tk7ql I got 1.5V on Pin 4 and 2.4V on pin 2 (the AND gate pads). I'm currently testing the card and it's working fine with Games sor far. May I bother you with one last question bro? Can I replace the BLN0 Drmos (AOz5311nqi) to a SIC632 Drmos? I've looked for the Datasheet of those mosfets and they quite similar with little differences (If I'm not wrong).
It should be 5v on pin 4. So the AND gate is not outputting the 5v now if the 1.5v is still present with the AND gate removed then 5v is shorting to the other side and you have a blown resistor between the DRMOS and the pin 4 of the AND gate which is dropping the voltage to 1.5v. since the DRMOS is receiving it's 5v it is activating the DRMOS and card is working as rest of the voltages are present. Now about switching to Sic I really have not tried it but if the Amps rating is the same and the pin out matches it should work. Just match the datasheet for both. When I get back home in the evening I will check it too and update you. There are a few differences you should know. The switching frequency for BLNO is 2Mhz whereas SIC is 1.5Mhz may cause issues(not confident as not tested myself). The pin out are the same so it can be installed but I have never tested this combination so I would not know how it will perform after installation.
3.3V is pin 1 , the middle pin is pin 2 . The enable voltage of 2.4V on pin 2 comes from the 6 pin Q-FET marked Q5. if on the Q-FET there is nothing coming from pin 3 You will have to check another AND gate marked U29.
I agree one is enough. I run 3. About the load. I assure you there is no configuration issue. My CPU is the bottleneck but that's not the purpose of the exercise. The idea is to check if the GPU will survive the test.
Thats good. With heavens the GPU boosts at max frequency. It depends on what I want to achieve. If I was repairing memory related errors then I only use heavens. If power related I use furmark or all 3 or sometimes 3dmark. It depends on what I am trying to test, stability or artifacts.
@csCardRepairs-tk7ql for memory testing i dont have anything better than Days Gone game. it put more load than furmark and best load on rams so when card withstand 1hour of this game, it is 100% ok
I have two 3070's and they still work just fine, but I do know where to send them if needed :)
Sure
Very nice interpretation on gadgets dear Frazer
Thank you 😁
Nice work brother ❤👍🏻
Thank you
Make a video on memory testing software making mats and mods in detail
Sure I will
Great opportunity to whos living dubai and mining guys 🎉❤
Thank you 😊
Hi. I have a similar problem with this AND gate not outputting 5V, but it is because there is no 2.4v on pin 2 of the AND gate. Anyone know where this 2.4v should come from? Thanks
There is an AND gate with the marking U29. It's on the right front side of the board near the memory Inductor. Check on pin 4 if you got any voltage. There should be voltage on pin 1, 2 and 5. Something may be missing there. Start there. It could also be that that AND gate is faulty.
Thanks bro! Your tip helped me a lot!
Can I ask you what cards have this type of AND gate and is it possible for some other cards to have this kind of problem?
thanks a lot.
All cards have AND gate. The one used on this card can also be found on the 2060, 2070 and 2080 cards. Apart from that the 3060 and 3060ti. 3070 is the one which dies commonly with this problem. Not observed other cards die like this.
@@GraphicsCardRepairs-tk7ql thank you for your response! I've found one on a 2080ti and while testing it, I think I accidentally caused a short circuit on the 12v line (second 8 pin connector) 😭
Do you have a thermal camera. It makes the job much easier.
@@GraphicsCardRepairs-tk7ql for the time being I don't have one but I'll try alcohol or a colophane powder I guess.
What is the part number for the gate please? I have the tools to replace but finding part number difficult to read.
The part number for the Logic Gate is M74VHC1GT08DFT2G.
Thank you
Welcome
I have a update on my fix with the same card bro!
So I found the shorted DrMosfet by removing all 4 inductors and I found the culprit and removed it.
I've replaced the AND Gate that has problems but the GPU refused to be detected.
At this point I decided to remove the replaced AND gate and started the GPU with mesuring the pads where the AND gate supposed to deliver 3.3V, 2.4V, 5V and 1.5V and to my biggest surprise all those voltages are present without the AND gate on the card!!!
I booted the card, installed the drivers and I was surprised it worked fine!
How is that possible bro? Can I leave it like this or should I definitely replace this AND gate?
The card worked even without the Mosfet replaced (I couldn't find one at the moment).
Looks like the 5v from the input is shorted to 5v output. That can explain why you have 5v on the output pin which triggers the DRMOS to activate. There is no other explanation. The AND on pin 4 is output that triggers 5v to DRMOS and pin 5 where it should have 5V input. Somehow 5v is going straight to pin 4 which should not happen without the AND gate. So currently it is bypassing the logic and activating the rest of the circuit. Now there should not be any 1.5v on any pin 1 should be 2.4v pin 2 should be 3.3v pin 3 is ground pin 4 is output and pin 5 is 5v input which gets transferred to pin 4 when voltage is present in pin 2 and 3. So on which pin do you get 1.5v? If pin 5 then there is something wrong with a resistor on the line.
@@GraphicsCardRepairs-tk7ql I got 1.5V on Pin 4 and 2.4V on pin 2 (the AND gate pads).
I'm currently testing the card and it's working fine with Games sor far.
May I bother you with one last question bro?
Can I replace the BLN0 Drmos (AOz5311nqi) to a SIC632 Drmos?
I've looked for the Datasheet of those mosfets and they quite similar with little differences (If I'm not wrong).
It should be 5v on pin 4. So the AND gate is not outputting the 5v now if the 1.5v is still present with the AND gate removed then 5v is shorting to the other side and you have a blown resistor between the DRMOS and the pin 4 of the AND gate which is dropping the voltage to 1.5v. since the DRMOS is receiving it's 5v it is activating the DRMOS and card is working as rest of the voltages are present. Now about switching to Sic I really have not tried it but if the Amps rating is the same and the pin out matches it should work. Just match the datasheet for both. When I get back home in the evening I will check it too and update you. There are a few differences you should know. The switching frequency for BLNO is 2Mhz whereas SIC is 1.5Mhz may cause issues(not confident as not tested myself). The pin out are the same so it can be installed but I have never tested this combination so I would not know how it will perform after installation.
@@GraphicsCardRepairs-tk7ql I'm so thankful for your long response bro!
It's detailed and precise!
👊
Awesome video
Thank you😁
For the output of and gate how much volt is that ?
Also it don’t have 2.4v in the middle. 3.3 is on, 5v is on, output and 2.4 is missing
The output on pin 4 should be 5V.
pin number 2 is 2.4 v right? Its missing 2.4v on pin 2
3.3V is pin 1 , the middle pin is pin 2 . The enable voltage of 2.4V on pin 2 comes from the 6 pin Q-FET marked Q5. if on the Q-FET there is nothing coming from pin 3 You will have to check another AND gate marked U29.
@@GraphicsCardRepairs-tk7ql thank for the reply bro, at u29 pin 1 is 1v, pin 2 is 3.3v, pin 3 is 0, pin 4 is 0, pin 5 is 3.3v
'A quick fix'. Haha, sure. As long as you have the equipment, knowledge and experience to go deep into testing and repairing.
Your right. 😀
why u have launched 3 gpu stress test ? one is totally enought. u have it badly configured because u have only 91% load
I agree one is enough. I run 3. About the load. I assure you there is no configuration issue. My CPU is the bottleneck but that's not the purpose of the exercise. The idea is to check if the GPU will survive the test.
@@GraphicsCardRepairs-tk7ql cpu bottleneck is because u run 3apps. i use only haven and with full teselation it can put good load
Thats good. With heavens the GPU boosts at max frequency. It depends on what I want to achieve. If I was repairing memory related errors then I only use heavens. If power related I use furmark or all 3 or sometimes 3dmark. It depends on what I am trying to test, stability or artifacts.
@csCardRepairs-tk7ql for memory testing i dont have anything better than Days Gone game. it put more load than furmark and best load on rams so when card withstand 1hour of this game, it is 100% ok
Great. I can try this game then as a stress test. Thank you for this suggestion 🫡