dromuald
Active Member
Anyone ever experience a problem on their GRT HS 1 EFIS like this. On power up it rapidly cycles through multiple displays as if a button or knob is stuck. All knobs and buttons seem to be free. The lower display works fine on all display pages. This problem occurs engine on or off, and I have reseated all of the connections on the back of the unit. Typically during power up after it loads the internal software there is a "accept" prompt. The display blows right past this and goes right into its rapid cycling routine. I will be calling GRT tomorrow and suspect I will be sending it in for repair.