Is the first beep longer than the three that follow? If so, that's typically a video or RAM issue. You really have to listen to beep codes and determine each beep's individual duration. It's that varying duration that actually allows for identification of the code.
Been a long time since I've had to use it, but I usually use this site because it has codes from different PC manufacturers (HP, Dell, Acer, etc.) in addition to those of actual BIOS manufacturers (AMI, Award, Phoenix): http://www.bioscentral.com/