IMac stuck on start up - Shuts down after progress bar complete

My iMac starts up, and immediately goes to a white screen with the apple logo and a progress bar starts. The progress bar fills up and then the computer turns off. My roommmate last used my computer and couldn't find the power button. He indicated to me he had to pull the monitor out far to find it. Could the connection to the back of the monitor have something to do with this problem?

No.
Try a SMC and PRAM reset, do each about 3 times. However before doing this ensure the power cable is firmly plugged into the back of the iMac and to the plug. If you have not done these resets before please click the link below for instructions.
https://discussions.apple.com/docs/DOC-3603
Please post back with the results.

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Macintosh HD greyed out and shut down after progress bar complets

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1) In a Finder window, select the Macintosh HD. Can you see the contents? If yes, you can select to drag over files.
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If it's under AppleCare take it in immediately.
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IMac starting and shuts down after less than one minute...

Hi !
I hope someone could help me with this problem...
I think I've tried everything... CMD+Alt+P+R / CMD+R / ... SMC...
I'm a little lost because I can't access to the computer (it shuts down before arriving on the desktop). I've also tried to access just to the hard drive by connecting 2 Mac with Firewire cable... And the same problem appears. The iMac is also shutting down to soon to backup anything...
Is there someone who has experienced the same problem ?
Thanks !
Best regards,
Jonathan.

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Just to rule out any hardware issues, might be a good time to run the OS X Lion: Use Apple Hardware Test

Ipod 2g will start and shut down after 10 secs on logo

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Think I have sorted it guys with a bit of searching:
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http://support.apple.com/kb/HT1543

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To The Apple Discussion Boards!
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On Thu, 20 Dec 2007 09:12:26 GMT, Rolf Lidvall wrote:
> See this article by Shaun Pond:
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> http://www.novell.com/coolsolutions/feature/15294.html
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Marcus Breiden
If you are asked to email me information please remove the - in my e-mail
address.
The content of this mail is my private and personal opinion.
http://www.didas.de

IMac stuck on start up - Shuts down after progress bar complete

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