If you have a small philips screwdriver I'd try taking it apart and reseating the video connector between the screen and the motherboard. Prior to that, though, wiggle and twist as best you can and see if something good happens. If something bad happens, the wiggling and twisting was a bad idea.
A flat screen doesn't have a red gun, a blue gun, and a green gun, just signal wires in a wide thin ribbon cable.
If that doesn't work check the back for external monitor options. Hopefully you have an old tube monitor laying around somewhere. That will keep you from going crazy for a couple of days.
Last week I tore my Dell Inspiron down to the motherboard six times to fix a power problem.