Laptop screen broken connect external monitor

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vamshi - Apr 28, 2015 at 07:25 AM
Hello,

I have compaq presario c791tu with windows xp installed,resently my laptop screen broken
My problem is when connected external monitor by vga cable,the monitor is showing windows start up but when windows loads completly monitor goes to standby mode.when i press fn+f4 nothing happens pls help