ive got a duo with an asus p5b mobo. i switched it on the another day and all i got was no signal input. i used a different monitor and cable and still the same problem. I then bought a new gfx card and im still getting no output to the monitor. this is an overclocked system. does it sound as if the mobo has gone? the strange thing is its boots up, all lights are running but it just wont output a picture.