Originally Posted by RedShoe

look at the top right hand side of your monitor, you'll see that along the right edge it's flat. Measure down about 3.25 inches and give it a firm tap right along that edge. If that doesn't work give it a good solid OPEN-HANDED slap on the top edge AT EXACTLY CENTER of the monitor. If that doesn't work try a closed fist and use the pinky edge of your fist it has a lot more padding there which should protect the monitor but still deliver enough force to 'jolt' the wires or whatever the fuck it does into the center of the monitor.

That's basically what you want to do. Apparently wires come loose inside and you have to (for lack of a better word) 'HIT' the monitor so the wires go back together and then it fixes monitors.

At least that's what my old man did to our TV as a kid and it always seemed to work.