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A1418 / EMC 2833 / Late 2015 / 3.1 GHz Core i5 or 3.3GHz Core i7 Processor. Released October 13, 2015.

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iMac Diagnostic LED Blinking

I have a iMac A1418 (emc 2833) that is not turning on

The Diagnostic LED #1 Blinks when the Power Cord is plugged in and if I press the Power Button it Blinks faster.

No other LEDS are on or turn on if I press the Power Button

I am thinking it may be the Power Supply but not sure. Anyone have info on testing the Power Supply?

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Hi

Thanks for the info

I already have taken out the Power Supply and all Caps look good

So do you or anyone have some info on testing the Output of the Power Supply like you would do on a PC ATX Power Supply?

por

Hi,

did you solve the problem? i have the same board and the same problem.

I have already exchanged the power supply but the problem is the same

Thanks a lot

por

Hi

Not did not fix it, Had a spare Motherboard so replaced that and all good now. So look like it was the Motherboard.

por

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Here’s how to replace the power supply:

Before doing so, pull the supply and examine the capacitors (cans) on the backside. Look for swelling and or leakage. This machine is rather new to have a failing power supply but. that’s what the diagnostic LED is telling you.

iMac Intel 21.5" Retina 4K Display Power Supply Replacement

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Andrew H será eternamente grato(a).
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