My E-120 MFD displays boat icon pointed way off the course heading. In the past, I corrected this by swinging the compass on my ST6002 autopilot. Commands: Standby button 2 seconds, display button until Compass Cal, Auto button to display Compass Swing OFF. When I press +1 button, it no longer responds - expended instruction to turn boat. Please advise what else I may try or inspect. Dan
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