Vertical lines on screen

lose internal video cable open>re-fasten>close (be sure to have a pill box to organize the screws)

Take out battery from laptop and disconnect power cable. Keep the power button pressed for 30 seconds and then plug the power cable. This will remove static charge from laptop and should resolve the display issue,

Your screen is in need of replacement.

The lcd inverter is on its way out and needs to changed.

your lcd screen damaged.u need to replace it with new.

You need the new LCD panel.

this is due to fault in the screen take it to the technician

Could be faulty graphics chip or faulty screen. If you can hook up external monitor and picture is fine then probably faulty screen. If external monitor shows same problem the faulty graphics chip. Take to repair shop and let them have a look.

update monitor driver
your screen may be going
how old is the system

If the double image is in a differant color, then its your convergence IC's that need replacement. This is not a job for the unexperienced person. If you have no electronic repair experience, please seek out a pro to assist you in this repair. There are two IC's, about 3"X5" that are black in color and have STK with several numbers following them. Good Luck PS please dont forget to rate this thread.