Generally, when one resolders a joint like the pin on your iBook's IC, one should first remove the old solder, then clean the joint, possibly add a bit of rosin based flux and then resolder the joint. Oh, and then clean any flux residue.

Having your graybeard desolder the two shorted pins probably got you pretty close to the full procedure.

I find that removing solder is much easier with ample liquid flux and desoldering braid, than with a vacuum based desoldering tool. However, I also find that the desoldering braid sold at Radio Shack is almost unusable. I like the Chemtronics brand available from Digi-Key.