APPLE MACBOOK PRO 15" MID 2015 RETINA IRIS INTEL i7 2.5GHZ 16GB RAM 512 SSD GB

SERIAL NUMBER   C02QJ9HTG8WP

THE LAPTOP POWER ON AND IN FULLY WORKING CONDITION BUT THE KEYBOARD AND THE TRACKPAD  DOESN'T FUNCTION  , I AM NOT SURE HOW TO FIX THIS ISSUE 

IT DOES WORKS FINE WHEN I CONNECT AN EXTERNAL KEYBOARD AND MOUSE AS IT FUNCTION FINE