Can't boot from cd or disk

I was in a process of upgrading os x 10.4 to 10.5 on my iMac and suddently power went out during upgrade. Then when I boot the system again normal startup apple logo appears for 1~2sec then black screen. I get an error message saids:
localhost:/ root# CSRHIDTransitionDriver::stop
IOBluetoothHCIController::start Idele Stopped
I tried booting from install cd, by holding "c"key but nothing happens.
Please help!
and thank you in advance

If you are still under the Apple warranty or have the APP, take your iMac to the Shibuya or Ginza Apple Store (If you can). If you have the APP you can request that a technician comes to your house to fix the iMac (since it is a desktop, the on location service applies).
If you are not able to boot from the OS X DVD you may need other tools such as Drive Genius, Tech tools or Disk Warrior to fix your problem. The guys at the Apple store or the telephone support may be able to help you better.

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