I think I killed my computer

[shunut]

My computer only had 512mb of RAM so I decided to upgrade. I ordered 2gb of new RAM (2 x 1gb). I got it today, installed it, now my computer doesn't work. Specifically my monitor will not come on. I've tried multiple monitors and monitor cables with no luck. I put the old RAM cards back in and the monitor still doesn't work. The RAM I purchased I know is compatible with my motherboard, so that can't be the problem, especially if I put the old RAM back in and it still doesn't work. I have run out of ideas. I've checked all the connections and nothing seems to be loose. I thought maybe its the video card, but my video card is integrated into my motherboard. Any ideas?