Gateway 900g monitor will not turn on. When the power button is pushed, the blue light just flashes.

Check the monitor with a known-good cable. Look for bent pins in the connector to be safe. Next, have a bright flashlight handy. Dim or turn off the lights in the room. Turn on the flashlight and hold it very close to the screen. Look around the screen carefully and try to see a dim image in the display--if you can see the computer image, it means a problem exists with either the power supply section or, the actual display section. What is happening in this case is two(2) extemely thin, very bright, fluorescent tubes are failing to ignite. These tubes are usually laid top and bottom on the larger monitors, out of view by the user. Their light is transmitted through a series of specially designed plastic sheets which reflect against a shiny back sheet--this gives you the crisp, bright whites and colors in the image. Warning: if repairable, this is a very involved repair. Have purchasing a new monitor in the back of your mind if you send the unit out to a repair facility for a quote.--Just my thoughts--Rick

Mine does the same thing if the monitor isnt connected to computer with just the power on it.
if its connected to your video card with your computer running, then your video card could be fried. =(