Can you still identify the component part numbers? Is it a single side board or multilayer board? I have have rebuilt them in the past (never a saw controller) with hard wire and replacing the burned components. Is it variable speed ? I wonder if a newer speed controller can be addapted? Do you have a schematic?
Sorry my Mr Fix it mode kicked in.
In reallity I would toss the saw and Buy a new one, I dont have time to fix anything anymore.