IMac Windows 7 Bootcamp Problem

Hi,
I tried installing Windows 7 on my new 27" iMac using Bootcamp. When I installed, however, the installation did not complete successfully. This is because after the initial setup, Windows can't seem to continue and doesn't get onto the "Setting up for first usage" screen - I just get a black screen, and the iMac reboots after several minutes.
When I reboot, it goes straight into this setup so I cannot enter Mac OS X.
The Windows 7 installation CD is also stuck inside of the iMac, which can't seem to be removed. No shortcuts or anything seem to be working because it never starts loading Mac OS X - It starts with a white screen and then tries booting to the Windows 7 CD without the Apple logo. I can't boot into anything because I can't remove the disk.
Has anyone got any ideas? This isn't a nice situation.
Thanks,
Jake.

Hi,
the usual way of choosing which operating system to boot is to hold down the 'alt/option'-key during boot to get to the Startup Manager.
To boot from your OSX installation DVD you can also use that key or alternatively the 'C'-key.
Once booted from the DVD choose your language and then from 'Utilities' in the Top Menu run Disk Utility to see what is really on your harddisk.
There is the possibility that during the Windows 7 installation you somehow deleted your OSX form the harddisk.
Regards
Stefan

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On another thread a few people have responded saying that their imac has the same situation, the cpu is going crazy and the imac gets hot with headphones or speakers plugged in. But this doesn't happen in the mac side.
If you have an late 2009 imac and don't have these audio issues, let us hear from you. If you don't, lay out the problem here.
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Not only does the cpu run crazy but the imac 27 gets very, very hot. Since I unplugged the headphones, it runs much, much cooler.
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