"Fuzzy" laptop screen.

For a while now, my Toshiba Satellite M305-S4819 has had screen trouble - from the moment I turn it on, I consistently have varying degrees of greenish flickering lines across the screen. It goes black at times as well. Shifting the screen back and forth allows me to continue using it, but it's gotten progressively worse - I think it might be the connecting wires between the laptop and screen, backed up by the fact that it gets worse when my laptop isn't plugged into an outlet.