Cita: AMIBIOS: 3 Short Beeps Memory failure in the first 64 KB.
http://www.uktsupport.co.uk/reference/biosb.htm
Cita: Your computer has memory problems. First check video. If video is working, you'll see an error message. If not, you have a parity error in your first 64K of memory. First check your SIMM's. Reseat them and reboot. If this doesn't do it, the memory chips may be bad. You can try switching the first and second banks memory chips. First banks are the memory banks that your CPU finds its first 64K of base memory in. You'll need to consult your manual to see which bank is first. If all your memory tests good, you probably need to buy another motherboard.
http://www.pchell.com/hardware/beepcodes.shtml
Asi es, todo parece indicar que es la RAM. Lo mas sencillo es que consigas memoria prestada de algun amigo, cambiala y ve si arranca, si no lo hace tendras que tener una PC de repuesta en la cual ir cambiando piezas de manera de prueba y error.