Monitor Mirroring - iMac 24 with damaged LCD screen

My iMac 24 LCD screen is damaged to the point where it is basically worthless. I have attached an external monitor via a VGA adaptor. Problem...since I cannot see the screen, I cannot get into system preferences to select "detect displays". Is there any way for the computer to detect the external monitor automatically? Or other suggestions. Thanks.

TrailTrim wrote:
My iMac 24 LCD screen is damaged to the point where it is basically worthless. I have attached an external monitor via a VGA adaptor. Problem...since I cannot see the screen, I cannot get into system preferences to select "detect displays". Is there any way for the computer to detect the external monitor automatically?
The last message of this thread may help:
http://discussions.apple.com/thread.jspa?messageID=6909570

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