When I added a modem to my computer the monitor stopped working. I am getting the one long beep followed by two short. I then get a long pause and two more shorts. I have Windows 2000 Pro. I removed the modem but I still have the problem of no monitor. It has a video card that plugs into the motherboard but that is about all I know. The software is still on the computer because I can not remove it with no screen. I have two computers that are exactly the same and they both did the same thing. Any help PLEASE!