Currently Being ModeratedMay 24, 2013 4:38 PM (in response to Nikmanto)
I don't know if this really works, but I have a "similar" problem (but in a macbook) and I surfed trough web and found that some iMac users solved little problems by just unplugging the power cord, waiting a little and then plugging it again. (I also found that some users press the power button for 30 seconds after unplugging the energy cord, and then connect it again, but i don't know if it's safe to do, you should google a little by this way).
I hope you solve your problem.
Currently Being ModeratedMay 24, 2013 4:40 PM (in response to Nikmanto)
Reboot, as soon as you hear the startup chime press and hold the command and R keys, release them when the recovery system loads.
Currently Being ModeratedMay 25, 2013 9:18 AM (in response to Nikmanto)
I sat last night and wanted to install bootcamp on my iMac 27 inch. I had downloaded Windows 7 as a. ISO file.
From the FAQ
Can I use a downloaded (ISO) version of Windows with Boot Camp?
MacBook Air (Mid 2011 and later), MacBook Pro (Mid 2012 and later, including Retina models), Mac mini (Mid 2011 and later), and iMac (Late 2012) can install downloaded (ISO) versions of Windows 7 and 8.
To determine if your Mac supports this feature:
- Click the Go menu and choose Utilities.
- Open Boot Camp Assistant.
- Click Continue. If you see a "Create a Windows 7 or later install disk" checkbox, your Mac supports the use of downloaded (ISO) install images. See the Boot Camp Installation & Setup Guide for more information.