[DG] [DG] Autohelm multi display asking for a code on power up

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We have mix of Autohelm (not sure what model) and ST60+ instruments. Recently, the Multi display was kicked and the screen was unreadable. I had an old Multi display from a previous boat which plugged in the daisy chain just like the old one. Upon power up the screen read "Enter Code". I entered all zeros as a guess and it came up and worked fine. After powering down and back on the next day, the display again read "Enter Code". I got it working again by entering zeros, but wonder if I can eliminate this need every time. Thank you