You can take apart the fan shroud and see if there is anything which blew up. If it’s something common like a capacitor you can find a replacement for it and see if it works.
Most likely you will see lots of burn marks and even PCB can be damaged. However you might get lucky and just need to replace a few capacitors.
Not the first time it happened. It happened to miners other times. Usually when they are in a rush to build a rig and end up plugging it in backwards.
It is unlikely that you will find blew up elements on the video card board. There is no protection on these power lines. If the voltage is too high, then it gets to the video chip and this is a serious consequence. Diagnosis is possible only in a specialized workshop, it is better not to do it yourself. Even such a video card can be sold for spare parts for 30-50% of the cost. Most likely you will see lots of burn marks and even PCB can be damaged. However you might get lucky and just need to replace a few capacitors.
Not the first time it happened. It happened to miners other times. Usually when they are in a rush to build a rig and end up plugging it in backwards.
