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jj72
BGA stuff is usually soldered on by robots laying blobs of solder, placing the chip on and then baking the thing in an oven to melt the solder.
This looks like something needed to be removed/replaced, in which case you can't use the same process to refit the chip, so they had to solder on individual mini fly-leads.
Must have been a very good reason to go to this much trouble rather than replacing it.