In CS737,when turn on two FD,only captain or CO side FD show up,but in the FCOM,it say two FD in EADI will show up.And will have a green light beside the FD switch indicate which side Fly control computer is working for both CAP and CO `s FD.Can fix it?Also the FD can`t assist  flareout ,the indicate will disappeare at 50ft.