The issue is the width of the cable's connector tang is slightly larger in the 2011 models. Power isn't either engaging because the power supply may still be bad, the switch is faulty, the logic board SMC is corrupted or the main board is just defective. The issue you face is the LVDS cable connection on the logic board as for some reason Apple used a slightly different version of the same connector between the 20 models. If nothing happens, then you have to start pricing logic board. While still holding the power button down, plug in the power then let go the power button. Something else you can try, with the cord unplugged, push and hold the power button for a few seconds. If that checks out then you have a logic board problem. If you can find where the switch plugs into the board, with the unit disconnected from power, check the switch with an ohm meter.
![a1286 logic board power connector a1286 logic board power connector](https://i.postimg.cc/W3W2yzXQ/175889290-474447133797026-8396318364338657871-n.jpg)
Do make sure the power connection from power supply to main logic board is fully seated. If you have a known good supply, then that either leaves a faulty power switch or the main board. I Can see the green light of one of the diagnostic leds (i assume it is led 1), but if I measure the power on pin 4 on the Logic board there is no power. I replaced the power supply, but still no result. This is from an Apple Certified repair person: My iMac 27 (late 2009) died after a power shortcut in the house. Installed incorrectly or need replacement. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be This LED will be ON when the computer is turned on and video signal is being generated.
#A1286 logic board power connector for mac
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We constantly update new technologies and tools and so we are confident to provide you with expert logic board repair and replacement solutions for both Apple Mac desktop and notebook computer models including Mac Pro, Mac mini, iMac, PowerBook G4, iBook G4, MacBook, MacBook Air and MacBook Pro models.
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