Nec ll550 display laptop screen black, back light is turn off [Closed]


When I connect an external screen to my NEC ll550 mg1k the lap top screen is black the back light is turned off somehow. Is there any way I can force the back light on?
The blue Fn key+F3 don't seem. to toggle between the two screens.
The bios is in Japanese so I left it alone.
Could windows 7 be the problem?

Thanks in advance regards Mondo

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