Hi I have currently intel core2duo e4400 2ghz cpu 1gb ram and 1gb nvidia 210 graphics card. I recently started using windows 7 from xp so wanted to upgrade ram. After installing another 1gb the monitor does not display anything though the comp starts. What could be the problem ? The comp starts with single ram, i even tried interchaging the ram in slots still problem persists. The PC is woring fine with 1 gb ram albit slowly. What should i do ?