hello i have a compaq 6520s laptop with ati graphic and 14.1" replacing the motherboard with 6720s which is intel 965gm with 15.4" when i put the board in 6520s body i get blank display on 14.1" how do i configure the 6720s m/b to work with a 14.1" screen do i change bios or change some setting on m/b like resistor