Ok i was working with him last night on skype trying to figure it out...this is what happened so that maybe a more technically able person can find a remedy...
So first thing we tried to do was check on the age of the video driver, 2005. Updated that but still no luck and despite following the directions the old driver was not overwritten. We then found that in device manager there are five (was it five?) Plug and Play Monitors when there should be only two...any ideas folks?
After reading I am assuming you are connecting your monitor to a lap top and plan to use the monitor is your only display.
There generally are two main possibilities that will cause this.
1. There is a CRT/LCD switch on your laptop. You press it once (function Key plus (laptop/CRT icon)) and it turns both of em on. You do it again and it goes solely to CRT. Some CRT displays will not show images if the image is being shared on Lappy's screen. Try pressing the function/button key combo twice.
2. Native resolution is not supported by the monitor. You can check this by starting the system in safe mode (lowest resolution/ no bells and whistles loaded) and try to use the function to swap around till you get an inage.
Let me know what you find (in detail) and I will help you resolve it.