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Model A1419 / EMC 3070 / Mid 2017 / 3.4, 3.5 or 3.8 GHz Core i5 or 4.2 GHz Core i7 Kaby Lake Processor (ID iMac18,3) / Retina 5K Display. Benutze die Anleitungen des iMac Intel 27" Retina 5K Display (Ende 2014 & 2015), da das Gerät sehr ähnlich ist.

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iMac will not turn on since November

Hi everyone,

My iMac has been dead since november - I’ve tried the reset procedures, new outlets and new A/C cables but nothing …

I want to get it repaired but am concerned about my SSD data. I was thinking of opening the iMac to get the data prior to taking in for repair.

The other thought was to replace the PSU myself and check our the diagnostic LED’s first.

Any advice would be much appreciated!

Thanks for reading my question!

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Carefully take the display off so you can check the onboard diagnostic LED’s following this guide iMac Intel 27" Retina 5K Display Display ersetzen You’ll need to get the tools and replacement adhesive tapes before you start iMac Intel 27" (2012-2017) Adhesive Strips & Plastic Cards

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Here's a breakdown of the onboard diagnostic LED's:

  • LED 1 - Indicates that the trickle voltage from the power supply is detected by the main logic board. This LED will remain ON while the iMac is connected to the AC power. The LED will remain on even when the computer has been shut down or put to sleep. The LED will turn off only if the AC power is disconnected or the power supply is faulty.
  • LED 2 - Indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
  • LED 3 - Indicates that the computer and the video card are communicating. This LED will be ON when the computer is communicating properly with the video card. If LEDs 1 and 2 are ON and you heard the startup sound, but LED 3 is OFF, then the video card might be installed incorrectly or need replacement.
  • LED 4 - Indicates that the computer and the LCD display panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.
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iMac Dead wird auf ewig dankbar sein.
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