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820-00597 locks up after short time during boot
21.5" 2017 iMac, A1418 EMC 3069 with 820-00597 logic board. Background: computer worked fine in 2020, wasn't used until a month ago. First boot showed these symptoms: Symptoms: Power is applied. Diagnostic lights 1,2,3 all light up properly every time. 1/3 of the time LED's 4 and 5 light up...- tbaker2500
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- Forum: Macbook Logic Board Repair Questions