Question Bypass an SJ Mosfet ?

[artk2219]

I'm not even entirely sure its a mosfet, but it was ripped off a board i was given and i was looking to do some testing to see if the card was still viable otherwise, its an OEM Dell RTX 2080. Do you guys gave any input on how i could bypass this? I know it carries risks, burning things out, etc, that's fine, its going in a test rig with random parts so that's alright. It looks like whatever knocked it out also ripped out the capacitor above it, and took part of the trace with it, but that just looks like it was a filtering cap, so eh. Its the one that would have been populated on u265.

https://imgur.com/a/GNFaIzx

View: https://imgur.com/a/GNFaIzx

 

[Aeacus]

Do you guys gave any input on how i could bypass this?

If it is two pad connection, then it is easy, solder a connection between two pads and call it a day.

But if it is 4, 6, 8 etc pad connection, then things get way difficult since we don't know how the connection goes through the chip.
E.g with 4 pad connection, it could be 1 to 3 and 2 to 4, rather than 1 to 2 and 3 to 4. Or it could be that 1 goes to 3 and 4 and 2nd trace starts/ends with the chip. We don't know.
Best to replace the chip with same, working one, when there are more than two solder pads.

 

[artk2219]

If it is two pad connection, then it is easy, solder a connection between two pads and call it a day.

But if it is 4, 6, 8 etc pad connection, then things get way difficult since we don't know how the connection goes through the chip.
E.g with 4 pad connection, it could be 1 to 3 and 2 to 4, rather than 1 to 2 and 3 to 4. Or it could be that 1 goes to 3 and 4 and 2nd trace starts/ends with the chip. We don't know.
Best to replace the chip with same, working one, when there are more than two solder pads.

Fair enough, i havent been able to find a replacement though is another issue, the only markings on it are SJ, and that has not been particularly helpful. Would anyone know what the actual component is so i can try to find a replacement on digikey or something?

 

[Aeacus]

You have few options;
1. Buy the very same GPU from 2nd hand market that is sold as parts (non-working). You can then take the missing chip from the donor board and plant it on the current one.
2. Send the GPU to Northridge Fix and pay them for the repair. Link: https://northridgefix.com
3. You could also contact Northridge Fix and ask what the missing component is. But i can't say for sure they would respond to you or tell where to buy the spare chip (they would loose business if they do it for every customer for free).

While Northridge Fix is USA based, they accept international shipping and can do repairs worldwide. (If you're located outside of USA.)

Alex, founder and owner of Northridge Fix, often posts electronics repair videos to his Youtube channel, that i find interesting and informative to watch.

Channel: https://www.youtube.com/@NorthridgeFix/videos

E.g Asus RTX 2080 Super repair;

View: https://www.youtube.com/watch?v=2WloNcR5-0k

They also sell all and every kind of equipment to do with electronics fixes. Soldering stations, microscopes, flux, capacitors, mosfets, connectors etc.