Correct, AA made the business decision (inadvisable IMO, but it's done) to not invest in IFE in Y on the 763s. There are overhead TVs through the cabin that will have movies, but that's it.
AA is actively retiring portions of the 763 fleet, but for the planes that will remain they chose to only invest in refreshing the J cabin. (That said, I'm not sure the Y cabin hasn't been refreshed since 1992, it just hasn't had IFE added).