Boot + Installation problem

Hi,

Yesterday my Imac crashed while playing WoW.
When rebooted my Imac wouldn't reboot from the harddrive, so I was forced to boot from CD/DVD.

First I performed a hardware test to check iff any hardware is damaged or not.
Test result negatif: nothing is broken.

So I boot from DVD and I start the installation, but when I chose Disk Utility my harddrive isn't in the list only my DVD.

I remarked then that my Imac makes some bizar noises.
Anyone have an idea?

Regards,

hmm... try wiping it clean and reinstalling OS X. If the problem persists, return your iMac and get a new one.