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  1. 4640 VT Sectional Control Question

    John Deere
    On my 4640 display, I can't get my Raven liquid controller to work with my John Deere 1910 Air Cart. I get this "!" exclamation point by the sprayer indicating something is wrong (see picture). Can anyone help me figure out what I'm doing wrong? I borrowed by neighbors 2630 display and it seems...
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