Imac only starts afer being unplugged from power for 10-20 minutes

Help:
My Imac (2009) wil not restart after shutdown or reboot. It stalls, displaying a gray screen and an a running circle. When I unplugg it from the poweroutlet and leave it unplugged for 10-20 min. it starts normal.
I have reinstalled the OS, unplugged all USB and network kabels ect. don all tips and tricks I have found on the web.
anny surgestions?

If you have a (white) Retail Snow Leopard Upgrade Disc, then you should be able to Repair your Macintosh HD as per > Mac OS X - Using Disk Utility to Repair a Disk
Follow the direction for Disk Repair, not repair permissions which should only be done using Disk Utility while running in OS X.
Unfortunately if repairing the Macintosh HD as described above doesn't work, then you will have to seek help from your local Apple Store or AASP.
Apple - Support - iMac - Service FAQ

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Solved!
Go to Solution.

Hey erik,
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Imac only starts afer being unplugged from power for 10-20 minutes

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