Try resetting the CMOS battery and/or replace it with a new one.
After going to the site, those numbers are the number of beeps. The beep codes are at the top of the site.
In which case that doesn't show just two short beeps.
Try making sure the video card isn't loose, and if you have two RAM modules try them one at a time. If you have anything plugged into the laptop (USB, firewire, ect..) remove them.
There has to be more beeps than just two though, unless that list is outdated; what else does it do when you press the power button. Do you see anything on the screen?