2010 imac display went black, but hard drive still working

Does anyone have an idea as to why the screen is black? Was on it about an hour ago with no problem. Have turned it off and back on, can hear it, but no matter what screen stays black.

Lolo55,
Thank you for visiting Apple Support Communities.
I understand that your iMac display shows a blank screen. Here is the best troubleshooting resource to go through when experiencing these symptoms.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT201177
Cheers,
Jason H.

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2010 imac display went black, but hard drive still working

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