REFERENCE iPhone 6 Plus Earpiece and Proximity Sensor not working(tip)

[tochits]

iPhone 6 Plus Earpiece and Proximity Sensor not working(tip)

History: No idea

Action Taken: test ear speaker works
replace front camera: still no luck

Trace line connections
J1111-1 to FL1151-2 good
J1111-3 to FL1152-1 good
J1111-2 to FL1165-2 good
J1111-4 to FL1164-2 good
FL1152-2 to U0900-L7 good
FL1152-1 to U0900-K7 good
FL1165-2 to U0900-L5 good
FL1164-2 to U0900-K5 good

Replaced U0900 : Still no luck

HMMMMMMMM...
Replaced Charging port : DONE

ito nalang katibayan ko.