Hello guys,
A friend gave me a GPU Radeon Sapphire Pulse RX580 8gb pretended to be dead. No power at all. I thought it could be a good idea witha bit of luck to fix this board regarding to the amount of videos related to GPU repairs saying it's mostly dead mosfet in this case .. I have a Lab PSU and my multimeter.. After few readings, yes i don't know where im going because the problem is nothing like the repairs video show. In my case, the 2 12V fuses, close to the 8 pins connectors, have blown but i don't find short to ground after this broken fuses...
No short on the 3v or 5v rail etheir...
So i tried to inject small voltage on the 12V rail but no amp is taken at all....
I tried to find a short obviously some caps beep some of them on the GPU ic itself but i heard its because of low resistance caps in some area..
I also found a short between VSS and VDD pins of a NCP81022 chip on the right end side of the board close to the mosfets line..
If components are in parallel i understand it can be a pain to find the problem but in my case, plenty of them are beeping around the GPU chip itself...
So i would like to know if there is a way to check if the GPU IC itself is dead and it's game over. I heard if you feed voltage on the 12v rail and you have the exact same voltage that goes to the GPU ic, it means it's game over.. but i don't know where to check.
Thank you for your help. May be im wasting my time with this board but as we say, live and learn.
Cheers
Geeom