Alright, My Compaq Presario works great for about 2 years until I was doing something to the connections in the back which required me to put it face down. I forget to put it right side up when I left for the day. When I came back, the computer was frozen up completely. No mouse, no keyboard, just a frozen screen. I pull the power cord out to turn it off and when I attempt to restart it I recieve no display. The first thing I think is the video card slid out after being upside down for so long. I take it apart and reseat the card but still no display. I try the monitor from another working system and still no display. Hoping to eliminate the possibility of a bad video card, I put it in another system and it worked. At this point I know its not the monitor or the video card. After further investigstion I notice that the heatsink was just caked with dirt. I mean bad... I live out in the country and there has always been a problem with dirt. My next thought was...maybe the processor overheated. I swap the processor and there is still no display. The board is getting power because the hard drive comes on. No beeps. No display. Ive almost totally concluded that the board is out. I just need confirmation. Can anybody help me? What happens when a motherboard goes out? Why would it have gone out? Any information you can offer me would be so greatly appreciated. Thank you so much.

Did you check your RAM sticks? Possibly joggled loose or shorted out? Try swapping with some other stick you know is good and see what happens... If your ram is mis-seated or bad, you won't boot.

I appreciate your response. I tried reseating, swapping, and just taking out all the ram but still nothing. Ive noticed a similar problem on the forums at http://www.computing.net/hardware/wwwboard/forum/11044.html . Any help would be greatly appreciated.