Turns on starts to show progress bar, then freezes at 60% can't get an
Replacing a friend’s iMac hard drive. Removed drive, pushed display (all cables but vertical sync still connected) back and removed drive. Ste up drive on other system for High Sierra. Placed drive back into the unit. Appears to boot up OK, but stops about 60% across. Tried all the usual stuff, tried internet recovery, external working drive… still can’t get it to boot to desktop, always stops 60% (when first reported here, thought display cable was bad per answer below, turns out it is OK)
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