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I’m having a problem on my iMac 27” Just after the chime it will show the loading bar then after a few seconds it just turns off so there’s no way I can get to use the keyboard.Is this possibly a power supply problem? I would appreciate some help.. Thanks Thundereux

  • Turns off as in the screen goes black or it’s completely powered off. The title and body don’t match, so it’s not clear – Allan Mar 30 at 18:00
  • Sorry if it may sound confusing... After the chime comes the loading bar for usually 5 seconds then it just switches off... – thundereux Mar 31 at 18:31
  • That could be any number of things from the power supply to the logic board. You'd need to get it professionally diagnosed because something is causing your power supply to shutdown. However, just going on my gut, I think you're correct and that your power supply is bad. – Allan Mar 31 at 18:44
  • Thanks very much Allan for Your time and appreciated opinion.. – thundereux Apr 2 at 2:07
  • No prob. Let us know how things come about. – Allan Apr 2 at 6:47

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