Here is a picture of the board inside the VeX controller. I expect the IFI FRC controller looks pretty much the same, just more so. Are you sure you can fix something like this? If so, first you probably need to test it and see what is still functional and what is not, and then see about replacing the non-functioning parts. However, you might be better off sending the board in to IFI for repair....which probably will cost less than replacing the whole thing if your repair attempt goes wrong.
This might be something your team should discuss?