RTX 3070 12V short

[LozinMust]

Hello guys.

I have an RTX 3070 (https://imgur.com/a/xF1Be1E) that showed shorts to ground on 12V from the PCIE lane and one of the 8-pin connectors. The 5V coil also seemed low (~59 ohm). Upon visual inspection, the bottom phase mosfet was blown, so I removed it from the board. This got rid of the short on the PCI lane but not the one on the 8-pin connector. As I couldn't find anything else wrong visually and the 1.8V and PEX were not shorted, I proceeded to inject voltage (0.9V 3.5A) at the shunt resistor that was shorting to ground. I couldn't find anything getting hot with my fingers and IPA, but the GPU got very mildly warm. Does anyone have suggestions on how to proceed from here or is it a dead end?

[clock_aa]

Re: RTX 3070 12V short

You have also dead one or more DrMos(you removed one) GPU power. Your injected voltage passes through dead drmos directly to gpu so it starts to warm up

[LozinMust]

Re: RTX 3070 12V short

Thanks a lot, clock_aa. You were right, another drmosfet was shorted but I couldn't find which one from voltage injection. I started removing drmosfets from the top and on the third one the 12V short was gone. The card is now posting, I just need to order and replace the components. Thanks for the help!