Chosen Solution
Mac Book Air was working perfectly, now it does absolutely nothing when I try to start it. Brought it to the Apple store and they reseated cables, still nothing. They seem to be grasping at straws. Any ideas?
I would start by using the MacBook Air 13" Early 2015 Battery Replacement guide to reseat the battery connector again and using the MacBook Air 13" Early 2015 I/O Board Replacement guide to reseat the MagSafe daughterboard. If that doesn’t fix the problem, my only other guess would be a MacBook Air 13" (Early 2015) 1.6 GHz Logic Board replacement. Find the right guides for the correct year that your MacBook’s generation is.