my laptop svga out don't recognize my cabinet.

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: hi there, : i have i laptop connected to my cabinet,but when i startup in dos, the image just appears on my laptopscreen and not on my cabinet! : when i connect a external computer monitor to my laptop,and startup the image directly appears on the external monitor,so what's the difference??? : (i want to get rid of that big ugly computer-monitor!) : hope you can help me out. : thanks,Maurice :

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