romac90 Posted September 26, 2018 Share Posted September 26, 2018 (edited) Hello guys, I got two iMacs 21,5" Mid 2011 which shows the exact same curious error. I have dissassembled it to test some Graphics Cards and reassembled it again. After power is plugged in, its fans start automatically. First in normal speed and after maybe 15-20 seconds at FULL speed. The last of the 4 LEDs, from left to right is lighting up. I tried a few times to dis- and reassembly this iMacs with no changes. I tried also to put out the small battery out and in. One time, I reassembled it wrong. There are to 7 PIN sockets for HDD PWR and the other 7 PIN socket for camera and other things, I accidently put them wrong in, for one time. Maybe it is one reason? I don't know. Maybe someone can help out here. Greets Edited September 26, 2018 by romac90 Link to comment https://www.insanelymac.com/forum/topic/335667-imac-215-mid-2011-wont-turn-on-1-led-lights-on/ Share on other sites More sharing options...
STLVNUB Posted October 16, 2019 Share Posted October 16, 2019 (edited) Boy I didn't know they made a 21,5 I must have been asleep edit: Oh I see 21.5, that's better Edited October 16, 2019 by STLVNUB Link to comment https://www.insanelymac.com/forum/topic/335667-imac-215-mid-2011-wont-turn-on-1-led-lights-on/#findComment-2693801 Share on other sites More sharing options...
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