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I see this is an old thread and I am a Rancher not a Landscaper, but I have one of these boards that have the manufacturing defect the part number is 635575 and the date code is 11AP07. My Rainbird controller randomly gives me the MV ERR. I cannot get the link to the PDF file posted in this thread to work. I am a DIY, I live to far away from anyone for them to justify the trip out. I can install the"Jumper" or I can buy a new board, if I could locate one or the instruction to install the jumper. I would prefer just replacing the board. Thanks to anyone willing to help out.
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