It's not moniting. It's got the two different colors of light, the green for when it's on and yellow for standby. My computer has been away for a while getting worked on and my monitor was just sitting around unplugged. It had worked fine last time I had my computer, but now when I plug it in the light just flashes in little short blips, green if it's connected to the computer and yellow if not. The power button (or any of the others for that matter) does nothing; if it's plugged in the light is flashing, no on or off. I've tried unplugging and reconnecting and using a different outlet and trying a different power cord, all to no avail. Do I have a broken monitor on my hands? By the way it's a flat panel, about 3 years old.