After replacing iMac logic Board fan spins loud and no video shows up
someone gave me a iMac 27 Mid 2011 completely taken apart so i had to put it back together. After putting it back together the machine powers on immediately the fan starts up slow and then all of a sudden the fan starts spinning super load and i have to unplug it from the back end to get it to stop. Nothing shows up on the LCD at all just wondering any idea what it could be?
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