Imac 27" A2115

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  • Eleways
    Senior Member
    • Oct 2014
    • 62
    • Italy
    #1

    Imac 27" A2115

    Hi there,

    I've an Apple iMac 2019 model A2115. Sometimes works fine, but many time doesn't works, the fan spinning but no chime e no video output.

    The diagnostic Led (3+2) are the same: 1-off 2-on 3-on 4 off 5 on

    Any idea?

    Ty Click image for larger version Name: IMG_1855.jpg Views: 625 Size: 39.3 KB ID: 3272594
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13829
      • Canada
      #2
      Review against the schematics on the position of these DEBUG LEDs. Each LED is an indicator to what is or is not working. Share the board # once it is known to verify the LED status. Could be a failing power rail that is causing that leg of the circuit to stop working. Have seen faulty tantalum caps do this in the past.

      When you have the fan spin - is it a high fan spin or normal? Tried a PRAM reset? Check the RTC battery (PPVBATT_G3_RTC) as well. Suggest to replace the coin cell battery for starters.

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