sounds like it could also be a screwd I.C.     OR it wasnt a equiv replacement board part.

NEXT MOVE - phone the best pinball tech in Australia who is a member here - Andrew(Beaky) on 0755 29 8886.  Andy will look after u with a multi-meter in hand.  (Note - I have spoken to Andy this morn and he said give him a quick call etc - he is happy to help u out).
 
Andy looks after all my 3 dozen dmd machines and can help u out over the phone I am sure.

Cavey !