Ok, to be honest I am not 100% sure that the smoke was from the cap, it could be around. I was in hurry to switch off the power
.But I will post the result if there is any progress....
Noovas
Member
Last Activity: 04-23-2022, 10:20 AM
Joined: 01-20-2022
Location: Sevlievo
-
Re: RX 470 mining short
Ok, to be honest I am not 100% sure that the smoke was from the cap, it could be around. I was in hurry to switch off the power.
But I will post the result if there is any progress.... -
Re: RX 470 mining short
Hello,
When I find a MOSFET dead I don't use it anymore
Caps were ok but the heat from the gun melted this plastic under.
Whe I have time I will remove the cap and measure it....Leave a comment:
-
Re: RX 470 mining short
I just turn it on to measure voltages but smoke come out from the cap
...
Leave a comment:
-
Re: RX 470 mining short
I just found that with coil and MOSFET on high side burns the MOSFET.Leave a comment:
-
Re: RX 470 mining short
Thank you Didi,
Here are some more tests I made but unfortunately they didn't show where the problem could be...
Till now with MOSFETs on high side (all low side removed) and coils motherboard want run. Then I removed all coils and motherboard runs. I put one coil and motherboard want run. After that I removed this coil and put another one to other place but again motherboard want run.
Then I decided to remove all low side MOSFETs and to put the coils. Motherboard runs. After installing just a single MOSFET on low side motherboard want...Leave a comment:
-
Re: RX 470 mining short
Yes, on the GPU side all coils are together and grounded!Leave a comment:
-
Re: RX 470 mining short
I think I stucked.... After removing the first choke there was no short for the corresponding MOSFET. Then I removed the second and the short for corresponding MOSFET also was gone. This is the same and for the other two. Now I don't have chokes and no short. It looks they are parallel to the MOSFET? One side to source and the other to drain ��...Last edited by Noovas; 04-21-2022, 12:33 PM.Leave a comment:
-
Re: RX 470 mining short
I applied 0,8V, 2A and after 10 minutes I still can find a warm component.
Now I will remove chokes one by oneLast edited by Noovas; 04-21-2022, 11:37 AM.Leave a comment:
-
Re: RX 470 mining short
If I don't detect any heat is that mean that the GPU is dead?
Also if I remove all 4 chokes and there is no shortage, this means that the GPU is dead?Last edited by Noovas; 04-21-2022, 11:06 AM.Leave a comment:
-
Re: RX 470 mining short
Thank you for your reply didi79.
I also was thinking to apply 0,5volts between drain and source and see if there is something heating.Leave a comment:
-
RX 470 mining short
Hello friends,
I have RX 470 4G mining card which is not working. After removing the mosfets there is still short between drain and source pads of the PCB.
I think that the problem could be a bad cap, but without schematic it is not easy, I just dont know where to start from. I am uploading a photo of the PCB with removed mosfets. Any idea will be helpfull!! Thanks for the support !!... -
Re: Cant find any datasheet for two chips.
Thanks!!Leave a comment:
-
Asus Rx 470 mining.Cant find any datasheet for two chips.
Hello, friends
I have one not working graphic card (Asus Rx 470 mining), which I am trying to repair. There are two chips which I am reading clearly but can't find anything about them. Google just says nothing for both of them. One is AMCH675 and the other one is 71630VSW. I tried different variations of tipping but without success. I am uploading a photo for each of them. I will really appreciate if someone can help....
Thanks... -
Re: New Members - please post your introductions here
Hello there,
This is my very first post here and I am sure it want be the last.Leave a comment:
No activity results to display
Leave a comment: