PSU defective on iMac?

Discussion in 'iMac' started by goldengel, Mar 15, 2016.

  1. goldengel macrumors newbie

    goldengel

    Joined:
    Feb 2, 2011
    Location:
    Switzerland
    #1
    Hi



    The iMac stopped to work suddenly. It switches off and it is impossible to get anything running. No light, no sound, no life.



    I opened the iMac and looked at the power supply. Is anyone experienced with the PSU repair and have some idea how to proceed in this repair. How to check if I need to order new power supply? Or perhaps just some parts (like MOS-FET).

    Or is it possible that CPU is defective?



    PSU: ADP-200DFB



    Video about current situation:









    Regards
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    1) This is the Mac Pro forum, post on the iMac forum may give you more luck.

    2) There is a thread here not long ago about PSU, some members discuss how to repair the PSU at there (replace all the capacitors which contribute 99% of the failure). But again, that's for Mac Pro PSU, the iMac may be very different.
     
  3. jkmags, Mar 16, 2016
    Last edited: Mar 16, 2016

    jkmags macrumors member

    Joined:
    May 6, 2011
    #3
    I had an issue with my power supply, it would from time to time make a loud buzzing sound. When my video went out and I needed to repair my video card I replaced the power supply at that time. I didnt see any of the diag lights on your motherboard turning on so it very well could be your power supply.

    I bought my Power supply from iFixit but i think it was over a 100 bucks so not sure if you want to gamble with buying one and finding out it was something else. I guess you could look on ebay for a used one but not sure how much they go for.
     
  4. Strider64 macrumors regular

    Strider64

    Joined:
    Dec 1, 2015
    Location:
    Suburb of Detroit
    #4
    I don't know about the iMac, but when I was building computers I had a cheap psu tester ($7 - $10 USD) or I used a multimeter that I would check the psu with if I was having any problems with the build.
     
  5. goldengel thread starter macrumors newbie

    goldengel

    Joined:
    Feb 2, 2011
    Location:
    Switzerland

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