IMAC won't turn on after installing Magic Mouse

Hello
I Have an intel 2 core duo aluminum. I installed the magic mouse and now I cannot star it. I get the Grey screen, Some time with the apple, some times just the gray screen. When I load the installer disk and run disk utility, the hard drive does not show up. Any Idea on how to fix my problem?
Thank you
Raoul

I'm afraid so. Still. I wonder how it just happened the exact moment I installed the magic Mouse. Thought it could be a compatibility issue
Thanks anyway
Raoul

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