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how do i fix the white screen on my extensa 4420

caleb1997caleb1997 Posts: 1Member New User
I have an acer extensa 4420 that was given to me when I boot up it has a blank white screen it will cast through vga to my flatscreen but when I go to move the mouse the screen flickers jumps back to center of the screen how do I fix these problems. the windows version is windows 7 professional  

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