Apple Logic Board
An Apple logic board is the most important thing in a computer, since it connects everything together. If your Apple computer is not working and you’ve tried everything, then most likely it’s your logic board.
Apple Logic Board 2.8 GHz (16GB) MacBook Pro 13 inch Late 2013 A1502 ME864LL/A, ME866LL/A, BTO/CTO ( 820-3476-A )
Apple Logic Board 2.3 GHz 16GB MacBook Pro 15" Late 2013 A1398 ME293LL/A , BTO/CTO - ( 820-3787-A )