21 inch Widescreen LCD

I bought the gateway 21 inch monitor as it has component capabilities 3 months ago. Now when I first turn it on the monitor goes into sleep mode every minute or so except only power cycling it turns if back on the input button will not. Gateway is trying to say its the graphics card. it does this on the VGA (down converted) and DVI port. Do you know of any compatibility issues?
http://www.gateway.com/programs/lcd/?cmpid=indexhome*products*21lcdprograms/lcd/index~~shtml

Swapping the card and monitor fixed this. Ultimatly it was the Monitor. I am concerned that the replacment is going to break. It is showing some of the earlier signs of failure.

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