Connect it to an external monitor or TV with a VGA
Connect the monitor to the
laptop's 15-pin video connection on the back of the computer
Once connected, your laptop may automatically switch to the new external display or you may be required to press a sequence of keys in order to switch from the laptop to the external display.
For example, often either Fn + F3, Fn + F5, Fn + F8, or Fn + F9 is pressed to switch between alternate displays,depends on the model.
However it sounds like you are going to require a new screen.