I have configured my two axis AP by using seperate power breakers for each servo. I have done this to allow flight testing of one axis at a time. However, I found today that with the roll axis servo power turned off, the pitch axis servo will not function despite the display indicating it is engaged. Movement of the stick for and aft shows 'slip' but there is no torque applied by the servo. Restoring power to the roll axis restores torque to the pitch axis. Very puzzling !
Richard
Richard