I got gray screen on my imac and doesn't want to start up

I got gray screen on my imac and peep sound and doesn't want to start up what should I do?
I have mavrick OS and my firmware password is enabled. ?
Any help
I tired to hold CMD+S or V when it starts up but doesn't help !!!

zaza2009 wrote:
I got gray screen on my imac and peep sound and doesn't want to start up what should I do?
http://support.apple.com/kb/ts2570

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zaza2009 wrote:
I got gray screen on my imac and peep sound and doesn't want to start up what should I do?
http://support.apple.com/kb/ts2570

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Carolyn Samit wrote:
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Use Command + R for Lion Recovery
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I got gray screen on my imac and doesn't want to start up

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