Its hard to tell from the photos, but the board looks filthy :-)
Ive done some recapping of Amiga boards and sometimes you cant see the leaking till you take the caps off. The liquid is literally sitting under them out of sight doing damage.
In your case, C21 looks real bad.. But the mobo looks dirty in lots of other areas. I would be taking all the caps off the board, cleaning the entire board and replacing with new caps.
I would say there is damage under the IDE port to, as there appears to be corrision on some of the legs..
IMHO this board needs a reallllly good clean and recapping.
