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View Full Version : iMac shuts off immediately after powerup




Aldyn
Jun 1, 2009, 05:01 PM
Ahhhhh!

Sometimes when I turn my iMac on, it'll start doing its thing—light comes on, chime goes, fan whirrs, but then it'll make a strange click/"werrrrh" noise and turn off.

It's happened twice to me since I've brought it home from school and each time I just tilted the monitor around while turning it on and it worked.

I have been avoiding turning off / restarting my computer because I'm afraid its going to happen and I won't be able to get past it.

Could the powersupply be loose or something? I really have no idea!



iLog.Genius
Jun 1, 2009, 05:02 PM
Looks like PSU failure. If not that, then it would be the logic board but that seems unlikely. You will need to take it in to have it checked out and possibly replaced.

drzz
Jul 14, 2011, 03:24 PM
Aldyn, did you ever find a solution to this problem? I have an iMac G5 exhibiting symptoms that are nearly identical to what you describe. If you found out what was wrong (or even better - a permanent solution) I would love to hear it.

BEL86
Jul 14, 2011, 07:45 PM
I was having the same problem, and now it won't turn on AT ALL! I just bought it a month ago and I was so excited...now I'm nothing but annoyed and disappointed! Please help!

Texran
Jul 14, 2011, 09:47 PM
I was having the same problem, and now it won't turn on AT ALL! I just bought it a month ago and I was so excited...now I'm nothing but annoyed and disappointed! Please help!

http://guides.macrumors.com/Mac_doesn%27t_boot