Repairing a monitor

Gautama2

Golden Member
Jun 13, 2006
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Took a computer off of my sister's boyfriend. Dell Dimension 8400, 17" LCD screen.

To cut right into the thick of it, it will display a picture for about 1 second and then go blank with the power light remaining green.

I have swapped the video card with a known working one, no change. Tried it in my main computer, no change. Swapped power and video cables, no change. I aimed a bright flashlight at the screen and it still appears blank.

What do you think? Backlight, inverter board? I don't have too much experience with monitors.