What sometimes looks like a simple repair when a chip burns like that, just find one and put it in. It's not as simple as that. The tiny copper tracks that you CAN see may have burned, but these motherboard are multi-layer and the tracks in between on the submerged layers may also be damaged, and those you CAN'T see! You will never obtain service information because its never released and if it is, its only when its obsolete. The components are more often than not given manufacturer reference numbers to deter cloning. So I'm afraid you are wasting your time.