I hooked the laptop to an external monitor. I got it to work by disconnecting the screen from the laptop. when I turn on the laptop the external monitor has hundreds of multicolor dashes on it. the colors change as it goes through the different screens of the booting process. once it is booted if i touch the mouse pad on the laptop and move the cursor the colors change. could it be a virus or is it my graghics card. i was watching something I downloaded from the internet on the laptop when this trouble started. I do not get any of these multicolored dashes on the laptop screen. just a blue light