iMac Help!
i've played 7-8 hours on my iMac (with Boot Camp - Windows 8.1) and then the iMac go out and I can't start the iMac with the Power Button.
SORTY FOR MY ENGLISH. I'M GERMAN.
iMac, OS X Yosemite (10.10.1), Boot Camp, USB Flash Drive, GPT
http://support.apple.com/kb/TS1367Troubleshooting when your computer won't turn on
http://support.apple.com/kb/TS1587Intel-based iMac: What to do if your computer won't turn on