Ok, So I'm home from school because it's our between terms break. My brother decides that he wants me to look at his Dell Dimension 2400. So I plug everything in and it starts beeping. It beeped about 6 times and some circles with letters in them lit up on the back where the keyboard plugs in. When I turn it on the button is green and stuff but nothing happens. It seems like everything is on and should be working fine, but it's not. I haven't the slighting idea of what is wrong with it. It's gotta be the computer because I tested the monitor on another computer we have and it worked just fine. The only guesses I could even begin to make would be either something is wrong with the BIOS or maybe some kind of heating issue or possibly the HD? Anyone have any idea of what is wrong with this thing?? Any help would be greatly appreciated. Thanks in Advance.