My imac stop suddenly..and all the disply is white

My imac 27  later 2012 stop suddenly..and all the display is white. After power off and on, the sistem does not boot anyway. Now I have a expensive white display. Can do anything ?

Hi there edic,
You may find the troubleshooting steps in the article below helpful.
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
-Griff W. 

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