Normaly they sell the complete circuit board for these units. If you have a part that is blown out, it is very probable that there are other parts that are damaged as well.
During warranty, they do not normaly fix these boards. They replace the board with a new one.
I would be looking at replacing the complete board. What will most likely happen and I have seen it often, is in this type of case, when a blown part is replaced, it blows again, because the parts that caused the failure must be also changed. I don't think you have the necessary tools, training, and design information about the circuit board to troubleshoot it properly to know the condition of all the other parts involved.
Sometimes there boards are rather expensive. You may find it more feasible to buy a new unit.
on Oct 16, 2018