Something's Wrong with my Monitor. Help Please.

[James]

All of a sudden, my monitor's display fucked up, out of the blue. It's become significantly dimmer, with some colors seemingly blurred and other looking out of whack, for lack of a better turn. Like, something orange looks REALLY orange, while everything else is still dim.

There's also horizontal grey lines going across the screen. They line up tih the side of boxes, images, text, toolbars, etc.

Someone please help.