Hello
What you're saying must be the capacitors and if they are swollen differently from the others it means they are broken because they have "burst" and probably spilled some liquid, although as a rule it is not so, it depends on the capacitor.
Honestly I don't think it's worth trying to fix it, it's possible that even by replacing the capacitors the board won't work due to some kind of internal damage, so if it was thrown away it must be for that reason.
If you want to try to fix it first you should replace those broken capacitors with new ones, but you need to find out what type of capacitors they are exactly to replace them with identical ones that perform exactly the same function as the damaged ones, and the truth is I don't know how you can find out the information of a capacitor on a board, I guess you could try to read the legend they supposedly have somewhere or on the board, but it's just a guess.
Regards