The board number is GU502DU. I repaired this a couple weeks ago and it came back with the same issue, same mosfet failed (PQH9201). I'm hoping that the GPU was spared this time.
I used the same replacement part (purchased from Mouser) and I'm certain the soldering was done properly since it took just as much effort to remove as before. What could cause this same mosfet to fail? I'm thinking if it was unsuitable then the others would fail too. I looked for similar failures on YTube and the mosfet was replaced with AOE6930 in one instance and AOE6932 in the other but it's possible that the exact replacement was not available at the time of those repairs?
While removing the black plastic on the opposite side of the board, PR9115 came off, a couple of the other components in the area also looked like they were suffering from "cold solder". It is part of the current sense circuit for this particular mosfet.
Should I consider replacing the mosfet with the AOE replacememts or is it likely that this resistor contributed to the repeat failure of this mosfet?
I used the same replacement part (purchased from Mouser) and I'm certain the soldering was done properly since it took just as much effort to remove as before. What could cause this same mosfet to fail? I'm thinking if it was unsuitable then the others would fail too. I looked for similar failures on YTube and the mosfet was replaced with AOE6930 in one instance and AOE6932 in the other but it's possible that the exact replacement was not available at the time of those repairs?
While removing the black plastic on the opposite side of the board, PR9115 came off, a couple of the other components in the area also looked like they were suffering from "cold solder". It is part of the current sense circuit for this particular mosfet.
Should I consider replacing the mosfet with the AOE replacememts or is it likely that this resistor contributed to the repeat failure of this mosfet?
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