Attached Link: http://www.sylvania-displays.com/Support/manuals/Input_Not_Supported_Win2K_XP.pdf

I found several references to the error message on Google. The one thing the ones I glanced at all refer to the resolution/refresh rate you have set. From the AOC Europe site: "This means the computer is sending an incompatible display mode to your monitor. Please check the users manual for supported display mode or input and configure your computer to those settings. The recommended setting for LCD panel is 1024x768 resolution and you may need to change the refresh rate of the monitor to 60Hz." You said you'd already played with these though. One thing everyone seems to say is use 60Hz for LCDs.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken